CN104518561A

CN104518561A - Civil direct current system and direct current power supply method

Info

Publication number: CN104518561A
Application number: CN201310460366.2A
Authority: CN
Inventors: 安小杰; 颜荣兴
Original assignee: Light & View Lighting Design Co Ltd
Current assignee: Light & View Lighting Design Co Ltd
Priority date: 2013-09-30
Filing date: 2013-09-30
Publication date: 2015-04-15

Abstract

The invention discloses a civil direct current system which comprises an energy collecting sub-system and/or energy accumulation sub-system, a dispatching control sub-system, an energy using sub-system and direct current power utilization network. The dispatching control sub-system controls the direct current output of the energy collecting sub-system and/or energy accumulation sub-system, so that the direct current power utilization equipment contained by the energy using sub-system is powered through the direct current power utilization network. Due to the fact that the energy collecting sub-system and/or energy accumulation sub-system mainly collects the direct currents of renewable energy sources such as solar energy, wind energy and fuel cells and the alternating currents of trough mains supply and different energy has different power supply quantity at different dates and time, the direct current output of the energy collecting sub-system and/or energy accumulation sub-system can be controlled through the dispatching control sub-system so as to supply stable direct currents to the direct current power utilization equipment. By the civil direct current system, the renewable energy sources such as the solar energy, the wind energy and the fuel cells and the trough mains supply can be effectively utilized.

Description

Civil direct current system and direct current power supply method

Technical Field

The invention relates to the technical field of direct current power utilization, in particular to a civil direct current system and a direct current power supply method for effectively utilizing renewable energy sources such as solar energy, wind energy, fuel cells and the like and trough commercial power.

Background

Energy and environmental problems have become major problems facing world and human beings, and developing new energy, enhancing the utilization and utilization efficiency of renewable energy, and the like are increasingly the hot spots concerned by various countries. The novel power technology which is efficient and economical and mainly applies new energy and renewable energy, such as solar power generation, wind power generation, micro gas turbine power generation, fuel cell power generation, biological power generation and the like, supplies power nearby at a load to meet the requirements of specific users, and has the advantages of high energy utilization rate, good energy-saving effect, less pollution and the like.

Direct current power generation facilities such as fuel cells, solar cells, and wind power generation provide direct current power, and since our electricity environment is alternating current power, it is generally necessary to convert the direct current power into alternating current power. Firstly, the ac has amplitude, frequency, and phase requirements, and additional cost is required to implement synchronous grid connection. Next, when the electric equipment needs dc power, it is necessary to convert the dc power output from the dc power generation facility into ac power and then convert the ac power into dc power, and in such a two-stage power conversion process, power loss due to power conversion increases, power utilization efficiency decreases, and further, a converter is necessary to perform ac/dc conversion, which requires more cost.

On the other hand, with the continuous development of household appliances, the internal power consumption of the household appliances tends to be direct-current, for example, most of the LED lighting sources which are gradually popularized work with direct-current power supply, and the current household audio and video and information communication devices such as televisions, computers, sound equipment, mobile phone chargers and the like all work with various direct-current power finally; although the existing air conditioner, refrigerator, washing machine, electric fan, dish washer and water heater are all supplied with AC power, data show that the DC power supply can work more efficiently along with the development of DC frequency conversion technology. Therefore, the direct current power utilization inside the household appliance is in conflict with the current alternating current power utilization environment, and the loss and cost of grid connection and conversion exist between the electric energy provided by the power generation equipment with various energy sources and the current alternating current power utilization environment.

Also, since ac power cannot be directly stored, it can be used only in real time. When the power supply is sufficient and the power demand is small or no demand is needed, electric energy is wasted, for example, the demand for power at night is small, and a large amount of power is wasted; when there is no power supply or the power supply is insufficient but the demand for useful electricity or the demand for useful electricity is large, the demand for useful electricity cannot be satisfied. However, direct current can be conveniently stored directly without real-time use, the remainder can be stored when the power supply is greater than the power demand, and the stored electrical energy can be used when the power supply is insufficient.

Therefore, the direct current generated by the direct current power generation facility is directly utilized to be used by the direct current power utilization equipment, so that the energy consumption generated by the two stages of power conversion can be reduced, and the generated direct current can be stored at any time to supply power according to the power utilization requirement.

For the utilization of solar energy among renewable energy sources, solar panels are mainly used in a manner of converting into electricity. The output voltage and power of the solar panel are changed along with the sunlight conditions in a day, under the condition of certain sunlight, if the output current of the solar panel is excessively absorbed, the output voltage is reduced to be lower than the available range, and the limit condition is that the output current is maximum, but the output voltage is zero. The sun conditions change from morning to evening, cloudy and sunny days of the weather conditions, different latitudes of regions and the like, so that effective utilization of solar energy is difficult. In a power system, the output of solar energy is matched to the load on the solar panel to achieve maximum power, and this matching is dynamically varied with time and sun exposure.

The output characteristic of wind power generation is similar to that of solar energy, if the load applied to the output of wind power generation is too heavy, the rotating speed of the fan blades is reduced, the output voltage is reduced, the fan blades stop rotating under the limit condition, although the output current is maximum at the moment, the output voltage is almost zero, and the output electric energy is also almost zero; therefore, for wind energy, the design of the power utilization system also needs dynamic load matching.

For the ac mains supply of the ac power grid, it is a subject of continuous research on how to convert the electric energy at the "trough" of the power consumption into the "peak" of the power consumption so as to greatly improve the utilization efficiency of the ac mains supply.

Disclosure of Invention

The invention aims to provide a civil direct current system and a direct current power supply method capable of effectively utilizing renewable energy sources and trough commercial power.

According to an aspect of the present invention, there is provided a domestic dc system, including:

an energy harvesting subsystem comprising one or more energy harvesting modules, the energy harvesting modules comprising a DC energy harvesting module and/or an AC energy harvesting module; the DC energy collection module is configured to collect direct current from a DC energy source and comprises an energy collection DC-DC conversion unit which is configured to convert the direct current with floating voltage into direct current with a preset specification; the AC energy collection module is configured to collect alternating current from an AC energy source and comprises an energy collection AC-DC conversion unit which is configured to convert the alternating current into direct current with a preset specification;

the energy storage subsystem comprises one or more energy storage modules, the energy storage modules comprise a first energy storage module and/or a second energy storage module, and the first energy storage module comprises a first charging unit, a first electricity storage unit and a first discharging DC-DC conversion unit; the first charging unit comprises an alternating current charging unit and/or a direct current charging unit, the alternating current charging unit is configured to charge the first power storage unit by Alternating Current (AC), and the direct current charging unit is configured to charge the first power storage unit by Direct Current (DC); the first power storage unit is configured to receive charging of the first charging unit and store electric energy; the first discharging DC-DC conversion unit is configured to convert the direct current with the floating voltage provided by the first power storage unit into direct current with a preset specification and output the direct current; the second energy storage module comprises a second charging unit, a second power storage unit and a second discharging DC-DC conversion unit, wherein the second charging unit is configured to charge the second power storage unit by direct current DC; the second power storage unit is configured to receive charging of the second charging unit and store electric energy; the second discharging DC-DC conversion unit is configured to convert the direct current with the floating voltage provided by the second power storage unit into direct current with a predetermined specification and output the direct current;

the energy utilization subsystem comprises one or more direct current electric equipment, and the direct current electric equipment uses the direct current with the preset specification as a power supply;

the direct current power utilization network is configured to transmit direct current output by the energy collection module of the energy collection subsystem and/or the energy storage module of the energy storage subsystem to the direct current power utilization equipment, and comprises at least two conducting wires, wherein one conducting wire is a positive electrode, and the other conducting wire is a negative electrode; the second energy storage module is connected with the direct current power utilization network through a connecting end, and the connecting end is an input end and an output end of the second energy storage module;

the dispatching control subsystem comprises a dispatching module, a plurality of electric quantity data acquisition modules, one or a plurality of distributed communication modules and a plurality of control modules, wherein the electric quantity data acquisition modules are connected with the distributed communication modules through signal lines, the electric quantity data acquisition modules are configured to acquire electric quantity related data from the input end and/or the output end of an AC energy acquisition module and/or the input end and the output end of a DC energy acquisition module of the energy acquisition module and/or the input end and/or the output end of a first charging unit and the input end and/or the output end of a first discharging DC-DC conversion unit of a first energy storage module of the energy storage module and/or the input end and/or the output end of a second charging unit and the input end and/or the output end of a second discharging DC-DC conversion unit of a second energy storage module, sending the electric quantity related data to the distributed communication module through the signal wire; the distributed communication module is configured to communicate with the scheduling module and/or other distributed communication modules through a communication bus, and is connected with the electric quantity data acquisition module and the control module through signal lines; the distributed communication module sends the received electric quantity related data to the scheduling module through a communication bus, receives a control instruction sent by the scheduling module through the communication bus, and sends the received control instruction to the control module through a signal line; the scheduling module is configured to generate a control instruction for controlling the acquisition of the electric energy and the output of the direct current by the energy acquisition subsystem and the storage of the electric energy and the output of the direct current by the energy storage subsystem according to a predetermined scheduling control strategy based on the electric quantity related data; the control module comprises an energy acquisition control module and an energy storage control module, wherein the energy acquisition control module is configured to control the acquisition of electric energy and the output of direct current by the energy acquisition module according to a control instruction received from the distributed communication module; the energy storage control module is configured to control the storage of electric energy and the output of direct current of the first energy storage module and/or the second energy storage module of the energy storage modules according to the control instruction received from the distributed communication module;

the input end of the energy collection module is electrically connected with an energy source through the energy collection control module, the energy collection module collects electric energy from the energy source under the control of the energy collection control module, and the output end of the energy collection module is electrically connected with the direct current power utilization network to output direct current with a preset specification to the direct current power utilization network;

the output end of a first charging unit of the first energy storage module is electrically connected with a first electricity storage unit through the energy storage control module, the input end of a first discharging DC-DC conversion unit is electrically connected with the output end of the first electricity storage unit through the energy storage control module, and the energy storage control module controls the output end of the first charging unit and the input end of the first discharging DC-DC conversion unit to be switched on or off;

the output end of a second charging unit of the second energy storage module is connected to a second electricity storage unit through the energy storage control module, the input end of a second discharging DC-DC conversion unit is connected to the second electricity storage unit through the energy storage control module, and the energy storage control module controls the connection or disconnection of the output end of the second charging unit and the input end of the second discharging DC-DC conversion unit;

the input end of a direct current charging unit in a first charging unit of the first energy storage module is electrically connected with a DC energy source, the input end of an alternating current charging unit in the first charging unit is electrically connected with an AC energy source, and the output end of a first discharging DC-DC conversion unit is connected with the direct current power utilization network so as to output direct current with a preset specification to the direct current power utilization network.

According to another aspect of the present invention, there is also provided a domestic dc system, including:

the energy collection subsystem comprises one or more energy collection modules, wherein each energy collection module comprises a DC energy collection module and/or an AC energy collection module, the DC energy collection module is configured to collect direct current by a DC energy source, the DC energy collection module comprises an energy collection DC-DC conversion unit, and the energy collection DC-DC conversion unit is configured to convert the direct current with floating voltage into the direct current with a first specification; the AC energy collection module is configured to collect alternating current from an AC energy source, and comprises an energy collection AC-DC conversion unit configured to convert the alternating current into direct current of a first specification;

an energy storage subsystem comprising one or more first energy storage modules comprising a first charging unit, a first electrical storage unit, and a first discharging DC-DC conversion unit; the first charging unit comprises an alternating current charging unit and/or a direct current charging unit, the alternating current charging unit is configured to charge the first power storage unit by Alternating Current (AC), and the direct current charging unit is configured to charge the first power storage unit by Direct Current (DC); the first power storage unit is configured to receive charging of the first charging unit and store electric energy; the first discharging DC-DC conversion unit is configured to convert the direct current with the floating voltage provided by the first power storage unit into direct current with a first specification and output the direct current;

the energy utilization subsystem comprises at least one power synthesis module and one or more direct current electric equipment, wherein the input end of the power synthesis module is connected to the output end of the energy acquisition module or the energy storage module to receive the direct current with the first specification, the direct current with the first specification is converted into the direct current with the second specification and is combined and output to a direct current electric network for transmitting the direct current, and the input end of the direct current electric equipment is connected to the direct current electric network;

the direct current power utilization network comprises at least two leads, wherein one lead is a positive pole, and the other lead is a negative pole;

the dispatching control subsystem comprises one or more dispatching modules, a plurality of electric quantity data acquisition modules, one or more distributed communication modules and a plurality of control modules, wherein the electric quantity data acquisition modules are connected with the distributed communication modules through signal lines, and the electric quantity data acquisition modules are configured to acquire electric quantity related data from the input ends and/or the output ends of the AC energy acquisition modules and/or the input ends and the output ends of the DC energy acquisition modules and/or the input ends and/or the output ends of the first charging units and the input ends and/or the output ends of the first discharging DC-DC conversion units of the energy acquisition modules and send the electric quantity related data to the distributed communication modules through the signal lines; the distributed communication module is configured to communicate with the scheduling module and/or other distributed communication modules through a communication bus, and is connected with the electric quantity data acquisition module and the control module through signal lines; the distributed communication module sends the received electric quantity related data to the scheduling module through a communication bus, receives a control instruction sent by the scheduling module through the communication bus, and sends the received control instruction to the control module through a signal line; the scheduling module is configured to generate a control instruction for controlling the acquisition of the electric energy and the output of the direct current by the energy acquisition subsystem and the storage of the electric energy and the output of the direct current by the energy storage subsystem according to a predetermined scheduling control strategy based on the electric quantity related data; the control module comprises an energy acquisition control module and an energy storage control module, wherein the energy acquisition control module is configured to control the acquisition of electric energy and the output of direct current by the energy acquisition module according to a control instruction received from the distributed communication module; the energy storage control module is configured to control the storage of electric energy and the output of direct current by the energy storage module according to a control instruction received from the distributed communication module;

the input end of the energy collection module is electrically connected with an energy source through the energy collection control module, and the energy collection module collects electric energy from the energy source under the control of the energy collection control module;

the output end of a first charging unit of the first energy storage module is electrically connected with a first electricity storage unit through the energy storage control module, the input end of a first discharging DC-DC conversion unit is electrically connected with the first electricity storage unit through the energy storage control module, and the energy storage control module controls the output end of the first charging unit and the input end of the first discharging DC-DC conversion unit to be connected or disconnected;

the input end of a direct current charging unit in a first charging unit of the first energy storage module is electrically connected with a DC energy source, and the input end of an alternating current charging unit in the first charging unit is electrically connected with an AC energy source.

The civil direct current system can effectively utilize new energy such as solar energy, wind energy, fuel cells and the like and efficiently utilize trough commercial power, can solve the problem of current energy shortage, can reduce the emission of carbon, and is beneficial to improving environmental pollution. The invention can be used in local areas such as houses, commercial buildings and the like.

Drawings

Fig. 1A shows a block diagram of a domestic dc system according to a first embodiment of the present invention;

fig. 1B is a schematic diagram illustrating a connection relationship between an energy storage module and an energy storage control module in the domestic dc system of fig. 1A;

FIG. 2 illustrates one implementation of an AC/DC charging unit;

fig. 3-5 show block diagrams of domestic dc systems with different configurations of energy collection and storage modules.

Fig. 6 shows an example of a distributed diagram of a civil dc system according to a first embodiment of the invention;

fig. 7 shows a block diagram of a domestic dc system according to a second embodiment of the present invention;

fig. 8 shows an example of a distributed diagram of a domestic dc system according to a second embodiment of the invention;

fig. 9 shows a flow chart of a dc supply method according to the invention.

Detailed Description

The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention, but the present invention is not limited thereto.

The invention provides a civil direct current system and a direct current power supply method, aiming at fully utilizing the existing natural energy and the existing trough commercial power of alternating current to solve the power utilization problem in the civil field and achieve the purposes of saving energy and being beneficial to environmental protection.

Fig. 1A shows a block diagram of a domestic dc system according to a first embodiment of the present invention, and as shown in fig. 1A, the domestic dc system of the present invention includes an energy harvesting subsystem 1000, an energy storage subsystem 2000, an energy consumption subsystem 3000, a dispatch control subsystem 4000, and a dc power consumption network 8000. Fig. 1B is a schematic diagram illustrating a connection relationship between the energy storage module and the energy storage control module in the domestic dc system of fig. 1A.

Wherein the energy harvesting subsystem 1000 and the energy storage subsystem 2000 draw electrical energy from an energy source 6000. The energy source 6000 may include one or more AC energy sources 6100, one or more DC energy sources 6200, and may also include both one or more AC energy sources 6100 and one or more DC energy sources 6200. The AC energy source 6100, for example, the utility power, may be a common utility power, preferably a trough utility power at night, and usually collects a trough utility power with a low utilization rate at night to reduce waste of electric energy at night, and in addition, the AC energy source 6100 may also be a wind power generator. The AC energy source 6100 includes an output port 6110. The DC energy source 6200 includes a DC energy source acquisition unit 6210. The DC energy source collecting unit 6210 collects energy of natural energy and converts it into electric energy to output. The DC energy source 6200 may be, for example, a DC power source from a solar panel that harvests solar energy and converts it to electrical energy and/or a wind generator that harvests wind energy and converts it to electrical energy.

The energy harvesting subsystem 1000 includes one or more energy harvesting modules for harvesting electrical energy from the energy source 6000. The energy collection module may be an AC energy collection module 1110 or a DC energy collection module 1120, and the energy collection subsystem 1000 may include one or more AC energy collection modules, one or more DC energy collection modules 1120, or both one or more AC energy collection modules 1110 and one or more DC energy collection modules 1120. The AC energy collection module 1110 is configured to collect AC power from the AC energy source 6100, and the AC energy collection module 1110 includes an energy collection AC-DC conversion unit 1111 connected to an output port 6110 of the AC energy source 6100 and configured to convert the AC power collected from the AC energy source into DC power of a predetermined specification for use by the energy subsystem 3000; the DC energy harvesting module 1120 is configured to harvest direct current from a DC energy source 6200, and the DC energy harvesting module 1120 comprises an energy harvesting DC-DC conversion unit 1121. The energy collecting DC-DC conversion unit 1121 is connected to the DC energy source collecting unit 1122 of the DC energy source 6200, and is configured to convert the DC power with the floating voltage collected from the DC energy source collecting unit 1122 into a DC power with a predetermined specification. The output end of the AC energy collection module 1110 (i.e., the output end of the energy collection AC-DC conversion unit 1111) and the output end of the DC energy collection module 1120 (i.e., the output end of the energy collection DC-DC conversion unit 1121) are respectively connected to the DC power grid 8000, and power is supplied to the energy consumption subsystem 3000 through the DC power grid 8000.

Specifically, for clarity, fig. 1A only exemplarily shows that the energy harvesting subsystem 1000 includes one AC energy harvesting module 1110 and one DC energy harvesting module 1120, and may actually include a plurality of AC energy harvesting modules 1110 and a plurality of DC energy harvesting modules 1120. When the energy harvesting subsystem 1000 includes multiple AC energy harvesting modules 1110 and/or multiple DC energy harvesting modules 1120, the multiple AC energy harvesting modules and/or the multiple DC energy harvesting modules may be centralized at one location or distributed at different locations. In addition, only one AC energy source 6100 and one DC energy source 6200 are exemplarily shown in the energy source 6000, and actually, the energy source 6000 may include one or more AC energy sources 6100, one or more DC energy sources 6200, and may also include one or more AC energy sources 6100 and one or more DC energy sources 6200. When the energy source 6000 includes two or more energy sources, the energy sources may be concentrated in one place or may be dispersed in different places.

The energy storage subsystem 2000 is configured to store electrical energy from an energy source 6000 and provide electrical energy to the energy usage subsystem 3000 according to a predetermined dispatch control strategy. As shown in fig. 1B, the energy storage subsystem 2000 may include one or more energy storage modules, which may be a first energy storage module 2100 or a second energy storage module 2200, and the energy storage subsystem 2000 may include only the first energy storage module 2100, only the second energy storage module 2200, and may also include one or more first energy storage modules 2100 and one or more second energy storage modules 2200. In particular, for the sake of clarity, the energy storage subsystem 2000 in fig. 1B only exemplarily shows one first energy storage module 2100 and one second energy storage module 2200, and may actually include a plurality of first energy storage modules 2100 and a plurality of second energy storage modules 2200, and the plurality of first energy storage modules 2100 and the plurality of second energy storage modules 2200 may be centrally located or discretely located at different locations.

The input of the first energy storage module 2100 is electrically connected to an energy source 6000. The first energy storage module 2100 includes a first charging unit 2110, a first power storage unit 2120, and a first discharging DC-DC conversion unit 2130. Among them, the first charging unit 2110 may include the ac charging unit 2111, or include the dc charging unit 2112, or include both the ac charging unit 2111 and the dc charging unit 2112 (as shown in fig. 2). The input end of the AC charging unit 2111 is electrically connected to the AC energy source 6100, and the AC power can be obtained from the AC energy source 6100 to charge the first electric storage unit 2120. The input terminal of the DC charging unit 2112 is electrically connected to the DC energy source 6200, and can obtain electric energy from the DC energy source 6200 to charge the first electricity storage unit 2120. The first power storage unit 2120 is configured to receive charging of the first charging unit 2110 and store power. The electrical output end of the first discharging DC-DC conversion unit 2130 is connected to the DC power grid 8000, and is configured to convert the DC power with floating voltage provided by the first power storage unit 2120 into DC power with a predetermined specification, and output the DC power to the DC power grid 8000, so as to supply power to the energy consumption subsystem 3000 through the DC power grid 8000. The first energy storage unit 2120 may be a battery pack, for example.

The second energy storage module 2200 is connected to the dc power supply network 8000 via a connection 20, where the connection 20 is both an input and an output of the second energy storage module 2200. According to a predetermined scheduling control strategy, the electric energy transmitted over the dc power grid 8000 may be stored in the second energy storage module 2200; the energy usage subsystem 3000 may also draw dc power from the second energy storage module 2200 via the dc power usage network 8000.

The second energy storage module 2200 includes a second charging unit 2210, a second storage unit 2220, and a second discharging DC-DC conversion unit 2230. The second charging unit 2210 is configured to charge the second power storage unit 2220 with the direct current DC transmitted over the direct current power grid 8000, and an input terminal of the second charging unit 2210 is connected to the connection terminal 20 of the second energy storage module 2200. The second power storage unit 2220 is configured to receive charging of the second charging unit 2210 and store electric energy according to a predetermined scheduling control strategy. The output of the second discharging DC-DC converter unit 2230 is connected to the connection 20 of the second energy storage module 2200. The second discharging DC-DC conversion unit 2230 is configured to convert the DC power with the floating voltage provided by the second power storage unit 2220 into DC power with a predetermined specification according to a predetermined scheduling control strategy and output the DC power to the DC power grid 8000, so as to supply power to the energy consumption subsystem 3000 through the DC power grid 8000. The second power storage unit 2220 here may be, for example, a battery pack.

The energy usage subsystem 3000 includes one or more dc power consumers 3100. The dc power consumption device 3100 is connected to the dc power consumption network 8000, and is configured to obtain dc power of a predetermined specification output by the energy collection subsystem 1000 and/or the energy storage subsystem 2000 through the dc power consumption network 8000. Wherein the dc consumer 3100 may be a household appliance using dc power, such as an LED lamp illumination source, an air conditioner, a refrigerator, a washing machine, an electric fan, a dish washer, a television, a computer, etc.

Alternatively, in the above embodiments of the present invention, the energy collection module and the energy storage module may also adopt different configurations. As shown in fig. 3, the energy source 6000 has a DC energy source 6200 and an AC energy source 6100, and accordingly, the energy capture module has a DC energy capture module 1120 that obtains energy from the DC energy source 6200 and an AC energy capture module 1110 that obtains energy from the AC energy source 6100. The DC energy collecting module 1120 and the AC energy collecting module 1110 are respectively connected to the DC power grid 8000, and transmit the DC power to the energy subsystem 3000 via the DC power grid 8000 to supply power thereto. The energy storage subsystem 2000 includes only a second energy storage module 2200 connected to the dc power grid 8000, which collects dc power transmitted over the dc power grid 8000 according to a predetermined dispatch control strategy and discharges to power the power utilization system 3000 according to the predetermined dispatch control strategy.

Fig. 4 is different from fig. 3 in that the energy storage subsystem in fig. 4 further includes a first energy storage module 2100, and the first energy storage module 2100 is connected to the DC energy source 6200 and the AC energy source 6100, and can directly obtain energy from the DC energy source 6200 and/or the AC energy source 6100 for storage.

Fig. 5 differs from fig. 4 in that a second energy storage module 2200 is not provided in fig. 5.

In fig. 3 to 5, the dotted line represents a communication bus.

The dispatch control subsystem 4000 includes one or more dispatch modules 4100, a plurality of electrical quantity data collection modules 4300, one or more distributed communication modules 4200, and a plurality of control modules 4400.

The electric quantity data collection module 4300 is connected to the distributed communication module 4200 through a signal line, and the electric quantity data collection module 4300 is configured to collect electric quantity-related data from an input and/or an output of an AC energy collection module 1110, and/or an input and/or an output of a DC energy collection module 1120, and/or an input and/or an output of a first charging unit 2110 of the first energy storage module 2100, and/or an input and/or an output of a first discharging DC-DC conversion unit 2130, and/or an input and an output of a second charging unit of the second energy storage module 2200, and an output of a second discharging DC-DC conversion unit 2230 of the energy storage module 2100. The collected electric quantity related data comprises voltage data, current data and the like, so that power and electric quantity can be calculated, and the electric quantity related data is sent to the distributed communication module through the signal wire. Therefore, it can be known how much electric energy is collected and output by the AC energy collection module 1110, how much electric energy is collected and output by the DC energy collection module 1120, how much electric energy is charged by the first charging unit 2110 and output by the first charging unit 2110, how much electric energy is input to the first discharging DC-DC conversion unit and output by the first discharging DC-DC conversion unit, how much electric energy is input or output by the second energy storage module, and so on. The distributed communication module 4200 is configured to communicate with the scheduling module 4100 and/or other distributed communication modules 4200 through a communication bus, and is connected to the electric quantity data collection module 4300 and the control module 4400 through signal lines. Specifically, the distributed communication module 4200 sends the received data related to the electric quantity to the scheduling module 4100 through a communication bus, receives the control instruction sent by the scheduling module 4100 through the communication bus, and sends the received control instruction to the control module 4400 through a signal line.

Optionally, the electric quantity data collection module 4300 may transmit the collected electric quantity related data to the scheduling module 4100 through the signal line, the distributed communication module 4200, and the communication bus at certain time intervals. In addition, optionally, the scheduling module 4100 may also query and acquire the input electric quantity related data and the output electric quantity related data of the AC energy collection module 1110 and/or the DC energy collection module 1120, the first energy storage module 2100 and/or the second energy storage module 2200 at certain time intervals.

The scheduling module 4100 is configured to generate control instructions for controlling the collection of the energy collection subsystem 1000 and the output of the direct current and/or the collection, storage and output of the direct current by the energy storage subsystem 2000 according to a predetermined scheduling control strategy based on the data related to the electric quantity collected by the electric quantity data collection module 4300, and send the control instructions to the control module 4400 through a communication bus, a distributed communication module 4200 and a signal line.

The control module 4400 may include a plurality of energy collection control modules 4410 and a plurality of energy storage control modules 4420, wherein the energy collection control modules 4410 are configured to control the collection of electric energy and the output of direct current by the energy collection modules according to control instructions received from the scheduling module 4100 via the distributed communication module 4200. Specifically, the input end of the energy collection module is electrically connected with the energy source 6000 through the energy collection control module 4410, and the energy collection module collects electric energy from the energy source 6000 under the control of the energy collection control module 4410. When the energy collection module includes the AC energy collection module 1110 and the DC energy collection module 1120, the input end of the energy collection AC-DC conversion unit 1111 of the AC energy collection module 1110 is electrically connected to the output port 6110 of the AC energy source 6100 through the energy collection control module 4410, and the input end of the energy collection DC-DC conversion unit 1121 of the DC energy collection module 1120 is electrically connected to the DC energy source collection unit 6210 of the DC energy source 6200 through the energy collection control module 4410. For example, the harvest control module 4410, based on control instructions communicated from the scheduling module 4100, may control how much electrical energy each AC and DC harvest modules 1110, 1120 respectively harvest from the AC and DC energy sources 6100, 6200, whether electrical energy is harvested from the AC and DC energy sources 6100, 6200, and whether the harvest modules harvest electrical energy from the AC or DC energy sources 6100, 6200, or both. Generally, in order to save energy, the energy collection module collects electric energy from the DC energy source 6200 preferentially, and collects electric energy from the AC energy source 6100 only when the electric energy collected from the DC energy source 6200 cannot meet the demand, and in addition, to avoid more waste of power in late night, electric energy of the valley commercial power of the AC energy source 6100 is mainly collected.

Optionally, the output ends of the AC energy collection module 1110 and the DC energy collection module 1120 may also be connected to the DC power utilization network 8000 through the energy collection control module 4410, so that the energy collection control module 4410 may control the DC power output of the AC energy collection module 1110 and the DC energy collection module 1120, including controlling how much DC power is output by the AC energy collection module 1110 and the DC energy collection module 1120 and whether to output DC power.

Here, the energy collection control module 4410 may be disposed near the scheduling module 4100, or may be disposed on the energy collection module side.

The power storage control module 4420 is configured to control the input and/or output of the first power storage module 2100 and the input or output of the second power storage module 2200 in accordance with control instructions received from the scheduling module 4100 from the distributed communication module 4200.

Specifically, as shown in fig. 1B, the energy storage control module 4420 includes a first energy storage control module and a second energy storage control module, and the first energy storage control module includes a first energy storage charging control unit and a first energy storage discharging control unit. The second energy storage control module comprises a second energy storage charging control unit and a second energy storage discharging control unit.

The output terminal of the dc charging unit of the first charging unit 2110 of the first energy storage module 2100 and/or the output terminal of the ac charging unit are electrically connected to the input terminal of the first energy storage unit 2120 via the first energy storage charging control module of the energy storage control module 4420, so that the energy storage control module 4420 can control the charging circuit between the first charging unit 2110 and the first energy storage unit 2120 to be switched on or off. The output end of the first energy storage unit 2120 is electrically connected to the input end of the first discharging DC-DC conversion unit 2130 via the first energy storage and discharge control module of the energy storage control module 4420, so that the energy storage control module 4420 can control the on/off of the discharging loop between the first energy storage unit 2120 and the first discharging DC-DC conversion unit 2130. In this way, the first energy storage unit 2120 may be in a charged state or a discharged state or a state neither being charged nor discharged.

Fig. 1B only exemplarily shows that the first energy storage control module includes a first energy storage charging control unit and a first energy storage discharging control unit. Optionally, the input terminal of the first charging unit 2110 may also be electrically connected to the energy source 6000 through the energy storage control module 4410, and in this case, the first energy storage control module may further include another energy storage control unit, which is connected between the energy source 6000 and the input terminal of the first charging unit 2110. When the input terminal of the first charging unit 2110 is electrically connected to the energy source 6000 through the energy storage control module 4410, the energy storage control module 4410 may control the input of the energy source 6000 to the first charging unit 2110 to be turned on or off. When the first charging unit 2110 includes a DC charging unit and/or an ac charging unit, the DC charging unit is electrically connected to the DC energy source 6200 through the energy storage control module 4410, and controls the DC energy source 6200 to be turned on and off; the AC charging unit is electrically connected to the AC energy source 6100 through the energy storage control module 4410, and controls the AC energy source 6100 to be turned on and off.

Optionally, the output end of the first discharging DC-DC converting unit 2130 may also be connected to the DC power grid 8000 through the energy storage control module 4410, and in this case, the first energy storage control module may further include another energy storage control unit connected between the output end of the first discharging DC-DC converting unit 2130 and the DC power grid 8000, so that the energy storage control module 4410 may control the output of the DC power of the first energy storage module 2100.

The output terminal of the second charging unit 2210 of the second energy storage module 2200 is connected to the input terminal of the second energy storage unit 2220 through the second energy storage charging control module of the energy storage control module 4420, so that the energy storage control module 4420 can control the on/off of the charging loop between the second charging unit 2210 and the second energy storage unit 2220. The output end of the second power storage unit 2220 is connected to the input end of the second discharging DC-DC conversion unit 2230 through the second power storage and discharge control module of the power storage control module 4420, so that the power storage control module 4420 can control the on/off of the discharging loop between the second power storage unit 2220 and the second discharging DC-DC conversion unit 2230; thus, the second energy storage unit 2220 may be placed in a charged state or a discharged state or a state in which it is neither charged nor discharged by the energy storage control module 4420.

Optionally, at least one energy collection control module 4410, at least one distributed communication module 4200, and at least one electric quantity data collection module 4300 in the scheduling control subsystem 4000 may be disposed on the energy collection module side. For example, when there are a plurality of AC energy modules 1110 and a plurality of DC energy modules 1120, at least one energy control module 4410, at least one distributed communication module 4200, and at least one electricity-quantity data acquisition module 4300 may be respectively disposed in each AC energy module 1110 and each DC energy module 1120.

One of the at least two energy storage control modules in the dispatch control subsystem 4000 is placed in the charging loop, and one is placed in the discharging loop), at least one of the distributed communication modules 4200 and at least one of the electricity-quantity data collection modules 4300 are placed on the first energy storage module and the second energy storage module, or may be placed together with other components in the dispatch control subsystem 4000. When there are a plurality of first energy storage modules 2100 and a plurality of second energy storage modules 2200, at least two energy storage control modules, at least one distributed communication module 4200, and at least one electric quantity data acquisition module 4300 may be disposed on each first energy storage module 2100 side and each second energy storage module 2200 side, respectively.

In the above embodiment, the energy collection control module 4410, the energy storage control module 4420, the distributed communication module 4200, and the electric quantity data collection module 4300 are included as an integral part of the dispatch control subsystem 4000. Optionally, the energy collection control module 4410, the distributed communication module 4200, and the electric quantity data collection module 4300 may also be respectively used as a component of the AC energy collection module 1110 and the DC energy collection module 1120; the energy storage control module 4420, the distributed communication module 4200, and the electrical quantity data collection module 4300 may also be included as a component of the first energy storage module 2100 and the second energy storage module 2200, respectively.

In addition, the scheduling module 4100 may include a clock unit 4110, a communication unit 4130, and a central processing unit 4120. In this case, the clock unit 4110 is configured to provide date and time information, and for the AC energy source 6100, since the AC energy source is divided into the valley commercial power and the non-valley commercial power, and the valley commercial power at night is wasted more, it is generally preferable to collect the valley commercial power of the AC energy source 6100 instead of collecting the non-valley commercial power, and it is possible to determine when to collect the electric energy from the AC energy source 6100 by the clock unit 4110. In addition, when the dc power consuming device is powered can be determined by the clock unit 4110.

The communication unit 4130 is configured to communicate with the communication unit 4130 of the distributed communication module 4200 and/or the other scheduling module 4100 (when there are a plurality of scheduling modules 4100) through the communication bus, and receive the power-amount-related data transmitted from the distributed communication module 4200.

The central processing unit 4120 is configured to generate a control instruction for controlling the energy collection module and/or the energy storage module according to a predetermined scheduling control policy according to first information, and send the control instruction to the relevant distributed communication module 4200 through the communication bus, where the first information includes the data related to the electric quantity received by the communication unit 4130 and date and time information provided by the clock unit 4110. The distributed communication module 4200 transmits the control command to the energy collection control module 4410 and/or the energy storage control module 4420, the energy collection control module 4410 controls input and/or output of the energy collection module, and the energy storage control module 4420 controls power storage and discharge of the energy storage module.

Preferably, the distributed communication module 4200 is further connected to the energy harvesting DC-DC conversion unit 1121 and/or the energy harvesting AC-DC conversion unit 1111 in the energy harvesting module, and the first charging unit 2110 and the first discharging DC-DC conversion unit 2130 of the first energy storage module 2100 in the energy storage module, and/or the second charging unit 2210 and the second discharging DC-DC conversion unit 2230 of the second energy storage module 2200, respectively, through signal lines. The energy collection DC-DC conversion unit 1121 and/or the energy collection AC-DC conversion unit 1111 of the energy collection module transmit the self status information to the scheduling module 4100 through the distributed communication module 4200 via the communication bus. The first charging unit 2110 and the first discharging DC-DC conversion unit 2130 of the first energy storage module 2100 and/or the second charging unit 2210 and the second discharging DC-DC conversion unit 2230 of the second energy storage module 2200 transmit their own status information to the scheduling module 4100 through the distributed communication module 4200 via the communication bus. At this time, the scheduling module 4100 further includes the self-state information of each component based on the first information, that is, the scheduling module 4100 may generate a control instruction according to a predetermined scheduling control policy based on the received power-related data and the received self-state information of each component, so as to control the energy collection module to collect the energy from the energy source 6000 and output the dc power, the first energy storage module 2100 obtains the electric energy from the energy source 6000 and stores the electric energy and outputs the dc power, and the second energy storage module 2200 stores the electric energy or discharges the electric energy. Here, the self status information may include status information that each component is in operation, standby, failure, and the like.

In addition, the energy harvesting DC-DC conversion unit 1121 and/or the energy harvesting AC-DC conversion unit 1111 may receive the control instruction from the scheduling module 4100 through the distributed communication module 4200 via the communication bus and put itself in a working or standby state according to the control instruction. The first charging unit 2110 in the first energy storage module 2100 may receive the control command from the scheduling module 4100 through the distributed communication module 4200 via the communication bus and place itself in an AC charging state, a DC charging state, or a standby state according to the control command. The first discharging DC-DC conversion unit 2130 may put itself in an operating or standby state according to a control instruction from the scheduling module 4100. The second energy storage module 2200 may place the second charging unit 2210 and the second discharging DC-DC conversion unit 2230 in a charging or discharging or standby state according to a control instruction from the scheduling module 4100.

In addition, the energy collection DC-DC conversion unit 1121 and/or the energy collection AC-DC conversion unit 1111 may also adjust the output voltage according to the control instruction. The first discharging DC-DC conversion unit 2130 in the first energy storage module 2100 and/or the second discharging DC-DC conversion unit 2230 in the second energy storage module 2200 may also adjust their output voltages according to the control instruction.

Optionally, the domestic dc system of the present invention may further comprise at least one environmental data collection module 7000. The environmental data collection module 7000 comprises an environmental sensor 7100 and a data transmission device 7200 connected to the environmental sensor 7100, wherein the environmental sensor 7100 is disposed near the energy source 6000 and is configured to collect environmental data around the energy source 6000, for example, for the case that the energy source is a solar cell module, the intensity of sunlight around the energy source is collected; when the energy source is a wind power plant, the wind strength around it is collected. The data transmission device 7200 is directly connected to the communication bus, or connected to the distributed communication module 4200 through a signal line, and is configured to transmit the collected environment data to the scheduling module 4100 through the signal line, the distributed communication module 4200 and the communication bus, or directly through the communication bus. At this time, the first information based on the scheduling module 4100 may further include the environmental data, that is, the scheduling module 4100 generates a control instruction for controlling the energy collection subsystem 1000 and the energy storage subsystem 2000 according to a predetermined scheduling control strategy based on the environmental data and the electric quantity related data, and controls which energy source to obtain the electric energy and how much electric energy to obtain.

For example, when the energy source 6000 includes a plurality of solar cell modules, wind generators, the environmental data collection module 7000 may include a solar irradiance measurement module for measuring irradiance of each solar cell module, a wind power measurement module for measuring wind speed around the wind generator, and an environmental temperature measurement module for measuring an environmental temperature around each solar cell module, wind generator. In this way, the scheduling module 4100 can know the current status of each energy source in time, so as to generate appropriate control instructions, so that the energy collection control module 4410 and the energy storage control module 4420 control which energy source to obtain the electric energy from and how much electric energy to obtain.

The dc powered device 3100 in the energy usage subsystem 3000 may include an electrical communication unit 3110. The electric communication unit 3110 is connected to a communication bus. The dc power consumption device 3100 transmits its own state information including, for example, whether or not the dc power consumption device 3100 is operating normally, what kind of problem is present, and the like to the scheduling module 4100 through the power consumption communication unit 3110 and the communication bus. At this time, the first information based on the scheduling module 4100 further includes self-state information of the DC electrical device 3100, that is, the scheduling module 4100 may generate a control instruction for controlling the energy collection subsystem 1000 and the energy storage subsystem 1000 and a control signal for the DC electrical device according to the self-state information of the DC electrical device 3100, the self-state information of the energy collection DC-DC conversion unit 1121 and/or the energy collection AC-DC conversion unit 1111 in the energy collection module, the self-state information of the first charging unit 2110 and the first discharging DC-DC conversion unit 2130 in the first energy storage module 2100 and/or the second charging unit 2210 and the second discharging DC-DC conversion unit 2230 in the second energy storage module 2200, the power related data, and the environment data (when the environment data collection module 7000 is provided). In this case, the enable and disable of the dc consumer 3100 may be controlled by the control signal for the dc consumer.

In addition, the dc electric device 3100 may further include an electric power consumption control unit 3120. The electricity control unit 3120 is connected to the electricity communication unit 3110 through a signal line. The power consumption control unit 3120 receives the control command transmitted from the scheduling module 4100 through the power consumption communication unit 3110 and the communication bus, and controls the dc power consumption device 3100 according to the control command. For example, when the dc power consuming apparatus is a tv, the power consumption communication unit 3110 and the power consumption control unit 3120 are provided inside the tv. When the television is turned on, the electric communication unit 3110 sends its own status information to the scheduling module 4100, and the scheduling module 4100 controls the dc power of the predetermined specification to be output from the energy collection module or the energy storage module according to the predetermined scheduling control policy and to be transmitted to the television through the dc power network 8000. In addition, when the current power is insufficient, the scheduling module 4100 may send a control command to control which dc consumers 3100 are powered on and which dc consumers 3100 are not powered on according to the importance of each dc consumer 3100. For example, when the television and the computer use the dc power at the same time and the dc power is insufficient, the scheduling module 4100 may send a control instruction to control to preferentially supply power to the computer and disconnect the power of the television. Of course, the power supply priority of the dc power consuming device may be set by the user in advance according to the needs of the user. .

Alternatively, the dc electrical device 3100 may include only the electrical control unit 3120, and in this case, the electrical control unit 3120 is connected to a communication bus, transmits its own state information to the scheduling module 4100 through the communication bus, transmits a control command generated by the scheduling module 4100 to the electrical control unit 3120 of the dc electrical device 3100, and controls the dc electrical device 3100 through the electrical control unit 3120.

Optionally, the electrical communication unit 3110 and/or the electrical control unit 3120 may also be provided in the energy consumption subsystem 3000 independently of the dc electrical device 3100, i.e. the energy consumption subsystem 3000 may comprise the electrical communication unit 3110 and/or the electrical control unit 3120, and the dc electrical device 3100. At this time, the dc electric device 3100 is connected to the electric communication unit 3110 and/or the electric control unit 3120, respectively. The electricity communication unit 3110 is connected with the communication bus and is connected with the electricity control unit 3120 through a signal line. The dc consumer 3100 transmits its own state information to the central processing unit 4120 through the electric communication unit 3110 and the communication bus; the power consumption control unit 3120 receives a control instruction transmitted from the central processing unit 4120 through the power consumption communication unit 3110 and the communication bus to control power supply and power off of the dc power consuming apparatus 3100. The electric communication unit 3110 and the electric control unit 3120 are connected to the dc power grid 8000.

In addition, the civil dc system of the present invention may further include an information subsystem 5000. The information subsystem 5000 may include at least one gateway device 5100, and one or more information terminal devices 5200. The information subsystem 5000 is suitable for communicating with other remote domestic direct current systems or upper management systems, and can also be connected with other information terminal equipment on the internet.

The gateway device 5100 and the information terminal device 5200 are electrically connected to the dc power grid 8000, respectively, to obtain dc power through the dc power grid 8000. The gateway device 5100, the information terminal device 5200 and the scheduling module 4100 are connected through a separately configured communication network or the communication bus to form an information network, forming an information communication platform.

Alternatively, the gateway device 5100 may be connected to the internet 9000. When different civil direct current systems are arranged in different places or all the civil direct current systems have upper management systems, the scheduling module 4100 in one civil direct current system can communicate information with the civil direct current systems and/or the upper management systems in different places through the gateway device 5100 and the internet 9000, so that unified and coordinated management is facilitated. The gateway device 5100 may be connected to another information terminal device on the internet via the internet, exchange information with each other, and learn with each other.

The information terminal device 5200 is connected to the gateway device 5100, and may include a human-machine interface device, such as a computer, and may further include a device for playing audio and/or a device for displaying video, and the like, for displaying status information of other remote domestic dc systems and information of dc consumers, and/or information from an upper management system, and/or information between other information terminal devices.

The dc power network 8000 may include two wires, one of which is a positive electrode and the other of which is a negative electrode. Optionally, the dc power grid 8000 may further include another wire serving as a common electrode, so that a voltage difference between the positive electrode and the common electrode, a voltage difference between the negative electrode and the common electrode, and a voltage difference between the positive electrode and the negative electrode can be obtained, thereby providing two power voltages, reducing voltages of the positive electrode and the negative electrode to the common electrode, and being safer for people.

In addition, optionally, when there are a plurality of DC energy collection modules 1120 and/or a plurality of first energy storage modules 2100 connected to a DC energy source, the input terminals of the plurality of DC energy collection modules 1120 and/or the plurality of first energy storage modules 2100 may all be connected to the same DC energy source 6200, so that the DC output power may be increased by connecting the DC power output by the plurality of DC energy collection modules 1120 and/or the plurality of first energy storage modules 2100 in parallel, and the requirement of the DC electric device 3100 with high power DC power may be satisfied. Similarly, when there are multiple AC energy harvesting modules 1110 and/or multiple first energy storage modules 2100 connected to an AC energy source, the input terminals of the multiple AC energy harvesting modules 1120 and/or the multiple first energy storage modules 2100 may all be connected to the same AC energy source 6100, and the output terminals are connected in parallel, which may increase the dc output power.

Of course, the input of one or more first energy storage modules 2100 (i.e., the input of the first charging unit 2110) and the input of one or more AC energy harvesting modules 1110 or DC energy harvesting modules 1120, respectively, may also be connected to different energy sources 6000.

In addition, the communication bus can be implemented by adopting one or more of wired communication technology, wireless communication technology and power line carrier technology.

In the above embodiment of the present invention, the predetermined scheduling control strategy may be set according to the energy collection module, the configuration of the energy storage module (power and storage capacity), and the demand of the energy subsystem (power, power consumption). For example, the following scheduling control policy may be set:

strategy 1, when the effective power of a renewable energy source (such as a solar battery pack or a solar panel) is larger than the total energy power required by all current energy using subsystems, determining that a DC energy collecting module works, collecting direct current from the renewable energy source to supply power to all the energy using subsystems, and determining that an AC energy collecting module does not work;

strategy 2, on the basis of strategy 1, when the effective power of the renewable energy source is larger than the total energy consumption power required by all energy consumption subsystems at present and the difference between the effective power and the total energy consumption power is larger than a first set threshold value (at this moment, the renewable energy source can be considered to have available power), the renewable energy source is used for charging one or more first energy storage modules and/or second energy storage modules with the minimum residual capacity. The method is mainly determined according to the size of the effective power of the renewable energy source and the power required by charging; the first setting threshold may be set manually as needed.

Strategy 3, when the effective power of the renewable energy source is less than the total energy power required by all current energy utilization subsystems, the energy utilization subsystems use the electricity stored by the first and/or second energy storage modules, and when all the energy storage modules do not store electricity, the AC energy collection module works to collect AC electricity from AC mains supply and convert the AC electricity into DC electricity to supply power to the energy utilization subsystems; if the total output power of all the energy storage modules is less than the total energy consumption power required by all the energy consumption subsystems, the AC energy collection module partially collects AC power from AC mains supply to supply power to the energy consumption subsystems;

strategy 4, on the basis of strategy 3, when alternating current needs to be collected from alternating current mains supply to supply power to the energy utilization subsystem, if the current time is in a non-trough mains supply time period, some direct current power utilization equipment of the energy utilization subsystem allowed to be closed are closed according to preset setting;

and strategy 5, on the basis of strategy 3, when the effective power of the renewable energy source is larger than a second set threshold value, charging the one or more first and/or second energy storage modules with the minimum residual quantity by using the renewable energy source.

Strategy 6, when alternating current needs to be collected from alternating current mains supply to supply power to the energy utilization subsystems, if the current time is in a mains supply trough time period and the sum of the electric energy storage quantities of all energy storage modules is smaller than the sum of the electric energy consumption quantities required by all energy utilization subsystems in normal use within a set first time period T1 (for example, 3 days), charging one or more first and/or second energy storage modules with the minimum residual electric quantity by using the alternating current mains supply;

and 7, if the sum of the electricity storage amounts of all the energy storage modules is larger than or equal to the sum of the electricity consumption amounts required by all the energy utilization subsystems in normal use within a set first time period T1 (for example, 3 days) but smaller than the sum of the electricity consumption amounts required by all the energy utilization subsystems in normal use within a set second time period T2 (for example, 5 days), supplying the energy utilization subsystems with the alternating current commercial power but not charging the first and/or second energy storage modules, wherein T2 is larger than T1.

Policy 8, device protection policy, fault handling policy, manual (external) intervention policy, etc.

It should be noted that, in order to ensure the implementation of the scheduling control strategy, the configuration of the capabilities (including power, capacity, etc.) of the energy collection module and the energy storage module needs to be carefully calculated to adapt to the requirements (power, power consumption, etc.) of the energy utilization subsystem.

The above-mentioned scheduling control strategy is only an example, and optionally, more or less strategies may be included or other scheduling control strategies may be adopted according to actual situations.

The control command generated by the scheduling module 4100 is generated according to the scheduling control strategy set above based on the aforementioned power related data, the aforementioned self-state information of each component, the aforementioned environment data, and the time and date information given by the clock unit in the scheduling module 4100, and can be adjusted at any time according to the state and demand of each component in the entire civil dc system. Therefore, the civil direct current system can save energy, fully utilize energy, ensure the direct current power supply requirement of the energy using subsystem and realize the intellectualization of direct current power utilization in the area range.

Fig. 6 shows an example of a distributed diagram of a domestic dc system according to a first embodiment of the invention. As shown in fig. 6, the energy source 6000 includes an ac energy source 6100 and a dc energy source 6200, where the ac energy source 6100 is an ac utility power, and the dc energy source 6200 is a solar cell module. Fig. 6 shows two AC energy collection modules 1110 for collecting AC power from AC mains power, two DC energy collection modules 1120 for collecting DC power from solar DC energy sources, and three first energy storage modules 2100 for collecting and storing electric energy from AC energy sources and solar DC energy sources, wherein the output terminals of the AC energy collection modules 1110, the output terminals of the DC energy collection modules 1120, and the output terminals of the first energy storage modules 2100 are connected to a DC power grid 8000, and a plurality of DC electric devices 3100 are connected to the DC power grid 8000. The AC power collecting module 1110 collects 220V AC power from AC mains and converts the AC power into ± 24V dc power; the DC harvesting module 1120 harvests the DC power with floating voltage from the solar DC energy source, converts it to DC power of, for example, ± 24V; the first energy storage module 2100 collects 220V ac power from ac utility power and/or collects floating DC power from a solar DC power source, converts it into battery-charged DC power, and stores it. The DC power grid 8000 transmits, for example, ± 24V DC power output from the AC power collection module 1110, the DC power collection module 1120, and the first energy storage module 2100 to the DC power consumer 3100 for use. Wherein here 24V is only an example and can be any other desired voltage.

Fig. 6 also shows a plurality of second energy storage modules 2200, which are located at different locations and are connected to the dc power supply network 8000. The second energy storage module 2200 collects and stores the dc power transmitted by the dc power grid 8000, and may also supply power to the dc power consumer 3100.

Fig. 6 also shows a scheduling module 4100, which is connected with the AC, DC, first and second energy storage modules 1110, 1120, 2100 and 2200, respectively, through communication buses for transmitting control instructions thereto. In addition, in fig. 6, an energy collection control module, an electric quantity data collection module 4300, and a distributed communication module 4200 may be respectively provided in each AC energy collection module 1110 and each DC energy collection module 1120, and an energy storage control module, an electric quantity data collection module 4300, and a distributed communication module 4200 are respectively provided in each first energy storage module 2100 and each second energy storage module 2200. In addition, the dotted line in fig. 6 represents a communication bus.

Fig. 7 shows a block diagram of a domestic dc system according to a second embodiment of the invention. As shown in fig. 7, the civil dc system of the present invention includes an energy collection subsystem 1000, an energy storage subsystem 2000, an energy consumption subsystem 3000, a dispatch control subsystem 4000, and a dc power consumption network 8000.

The energy collection subsystem 1000, the dispatch control subsystem 4000, and the dc power network 8000 are the same as the energy collection subsystem 1000, the dispatch control subsystem 4000, and the dc power network 8000 described in fig. 1A and 1B, and for brevity, a description thereof is not repeated.

The energy storage subsystem 2000 is configured to store electrical energy from an energy source 6000 to provide electrical energy to the energy usage subsystem 3000 according to a preset dispatch control strategy. In this second embodiment, the energy storage subsystem 2000 may include one or more first energy storage modules 2100, where the first energy storage module 2100 includes a first charging unit 2110, a first power storage unit 2120, and a first discharging DC-DC conversion unit 2130. The first charging unit 2110 may include an ac charging unit 2111, may include a dc charging unit 2112, and may also include both the ac charging unit 2111 and the dc charging unit 2112 (as shown in fig. 2). The input end of the AC charging unit 2111 is connected to an AC energy source 6100, the AC charging unit 2111 is configured to obtain AC power from the AC energy source 6100 to charge the first power storage 2120, the input end of the DC charging unit 2112 is electrically connected to a DC energy source 6200, and the DC charging unit 2112 is configured to obtain DC power from the DC energy source 6200 to charge the first power storage 2120. The first power storage unit 2120 is configured to receive charging of the first charging unit 2110 and store power. An electrical output terminal of the first discharging DC-DC conversion unit 2130 is connected to the DC power grid 8000. The first discharging DC-DC conversion unit 2130 is configured to convert the DC power with the floating voltage provided by the first power storage unit 2120 into DC power with a predetermined specification, and output the DC power to the DC power grid 8000, so as to supply power to the energy consumption subsystem 3000 via the DC power grid 8000.

As for the arrangement of the energy collection module and the energy storage module, the arrangement described in fig. 3 to 5 may be adopted. Of course, the configuration is not limited to the configuration described in fig. 3-5.

The energy usage subsystem 3000 includes at least one power synthesis module 3200, a dc power grid 8000, and one or more dc power consumers 3100. The dc consumer 3100 and the dc power network 8000 have the same structure as the dc consumer 3100 in the first embodiment of the civil dc system described in fig. 1A and 1B, and therefore, for the sake of brevity, a description thereof will not be repeated.

The power synthesis module 3200 is configured to convert the DC power of the first specification output by one or more of the AC energy harvesting modules 1110, one or more of the DC energy harvesting modules 1120, and/or one or more of the first energy storage modules 2100 into DC power of a second specification and combine the DC power of the second specification and output to the DC power grid 8000; the input end of the dc consumer 3100 is connected to the dc power grid 8000 to obtain the dc power of the second specification output by the power combining module 3200 through the dc power grid 8000. The power combining module 3200 includes two or more than two energy-consumption DC-DC converting units 3210, the energy-consumption DC-DC converting units 3210 are configured to convert the direct current of the first specification output by the energy collection module and/or the first energy storage module 2100 into the direct current of the second specification, and an input end of one of the energy-consumption DC-DC converting units 3210 is electrically connected to an output end of one of the energy collection modules or an output end of the first energy storage module 2100; the output ends of the two or more energy-consuming DC-DC conversion units are connected in parallel, and are connected to the DC power grid 8000 as the output end of the power combining module 3200. In this way, the power combining module 3200 can connect the outputs from the energy harvesting module and/or the first energy storage module 2100 in parallel to obtain a high-power dc output, so as to supply power to the dc consumers 3100 with various power requirements. The input end of the dc consumer 3100 is connected to the dc power grid 8000 to obtain the dc power of the second specification output by the power combining module 3200.

The dispatch control subsystem 4000 includes one or more dispatch modules 4100, a plurality of electric quantity data acquisition modules 4300, one or more distributed communication modules 4200, and a plurality of control modules 4400, as described above with respect to the dispatch control subsystem 4000 in the first embodiment of the domestic dc system shown in fig. 1A and 1B. The scheduling module 4100 may generate control instructions for controlling the input and output of the energy collection subsystem 1000 and/or the energy storage subsystem 2000 according to a predetermined scheduling control strategy based on the electric quantity related data collected by the electric quantity data collection module 4300. When the environmental data collection module 7000 is provided, the scheduling module 4100 may generate a control instruction for controlling input and output of the energy collection subsystem 1000 and/or the energy storage subsystem 2000 according to a predetermined scheduling control strategy based on the electric quantity related data collected by the electric quantity data collection module 4300, the environmental data collected by the environmental data collection module 7000. In addition, when the energy collection AC-DC conversion unit 1111, the energy collection DC-DC conversion unit 1120, the first charging unit 2110, and the first discharging DC-DC conversion unit 2130 transmit their own status information to the scheduling module 4100 via the distributed communication module 4200, the scheduling module 4100 may generate a control instruction for controlling input and output of the energy collection subsystem 1000 and/or the energy storage subsystem 2000 according to a predetermined scheduling control policy based on the electric quantity-related data collected by the electric quantity data collection module 4300, the environmental data collected by the environmental data collection module 7000, and the own status information transmitted by the above components.

In the second embodiment, the connection relationship between the first charging unit 2110, the first power storage unit 2120, and the first discharging DC-DC conversion unit 2130 in the first energy storage module 2100 and the energy storage control module 4420 is the same as that between the respective components shown in fig. 1B. In addition, the DC-DC conversion unit 3210 of the power combining module 3200 may be connected to the distributed communication unit 4300 via a signal line, and transmit the self status information to the scheduling module 4100 via the communication bus via the distributed communication unit 4300. At this time, the scheduling module 4100 may generate a control instruction for controlling input and output of the energy collection subsystem 1000 and/or the energy storage subsystem 2000 according to a predetermined scheduling control policy based on the electric quantity related data collected by the electric quantity data collection module 4300, the environmental data collected by the environmental data collection module 7000, and the self-state information of the energy collection AC-DC conversion unit 1111, the energy collection DC-DC conversion unit 1120, the first charging unit 2110, the first discharging DC-DC conversion unit 2130, and the energy use DC-DC conversion unit 3210. In addition, the energy-using DC-DC conversion unit 3210 may also receive a control instruction from the scheduling module 4100 through the distributed communication module 4300 via the communication bus and adjust its output voltage according to the control instruction.

In addition, optionally, the civil dc system according to the second embodiment of the present invention may also include an information subsystem 5000, and the information subsystem 5000 is the same as the information subsystem 5000 described in the foregoing first embodiment, and for the sake of brevity, the description will not be repeated here.

Fig. 8 shows an example of a distributed diagram of a domestic dc system according to a second embodiment of the invention. As shown in fig. 8, two sets of domestic dc systems are shown connected to each other. Each set of domestic DC systems comprises two AC energy harvesting modules 1110 and two DC energy harvesting modules 1120, two first energy storage modules 2100. The two AC energy collecting modules 1110 are connected to the same AC energy source 6100, i.e., the AC utility power, and collect AC power from the AC utility power and convert it into 48V dc power for output. The two DC power collecting modules 1120 are connected to a DC power source 6200, i.e., a solar cell module, and collect DC power with floating voltage and convert the DC power into DC power of 48V for output. The two first energy storage modules 2100 are respectively connected to an AC energy source 6100 and/or a DC energy source 6200, collect and store AC electric energy and/or DC electric energy, and can convert into a 48V DC output.

The two AC energy collection modules 1110, the two DC energy collection modules 1120, and the two first energy storage modules 2100 are each connected to an energy consumption DC-DC converter in the power synthesis module 3200, which is configured to further convert the 48V DC power from each energy collection module and energy storage module into 24V DC power for supplying each DC power device connected to the DC power grid 8000 via the DC power grid 8000. The power combining module 3200 may output the direct currents output by two or more of the plurality of energy-using DC-DC converters in parallel, so as to obtain a large power to supply power to a high-power direct-current power-using device.

In the commercial dc system according to the second embodiment shown in fig. 8, dc power supply networks 8000 of two commercial dc systems are connected in parallel. The dispatch control subsystem 4000 is respectively connected to the output ends of the AC energy collection module 1110, the DC energy collection module 1120, and the first energy storage module 2100 in the two groups of civil DC systems, and is configured to respectively control the output of the DC power of each module based on a dispatch control strategy. In addition, the dotted line therein represents a communication bus.

The civil direct current system can be used for building a direct current electricity utilization environment in a cell and in the whole building.

Fig. 9 shows a flow chart of a dc power supply method according to an embodiment of the invention. As shown in fig. 9, the dc power supply method 900 of the present invention is mainly implemented by the following steps:

in step S910, configuring an energy source based on the type and performance of the energy source and the requirement of the dc power equipment; and controlling the collection of electric energy from the energy source according to a preset scheduling control strategy, converting the collected electric energy into direct current with a preset specification and transmitting the direct current through a direct current power utilization network.

The direct current power supply method can adopt a plurality of energy sources to supply power according to requirements, the energy sources can be solar power generation equipment, wind power generation equipment, alternating current power supply and the like, and one or more energy sources can be adopted for each energy source so as to meet the requirement of power supply within a certain range. When multiple energy sources are employed, the performance of each energy source may also be different, for example, the amount of electricity it can collect, the power generated, and so on. In addition, in order to make full use of renewable energy and reduce carbon emissions, alternating current is used as little as possible. However, due to instability of electric energy supply of renewable energy sources such as solar power generation, wind power generation and the like, alternating current can be selected as an alternative energy source, and when the electric energy supplied by the renewable energy source is insufficient, the alternating current can be used for supplying power to ensure stability of power supply.

Thus, for example, when a cell uses dc power to supply users, it is necessary to calculate how many energy sources need to be allocated to the cell based on the required power consumption, available energy sources, and the performance of the energy sources of the dc power consumers in the cell. Alternatively, this cell may be configured with an energy source that exceeds the power demand required by its dc consumers.

And then, controlling the energy source to collect electric energy according to a preset scheduling control strategy, converting the collected electric energy into direct current with preset specifications required by the direct current electric equipment, and transmitting the direct current electric equipment through the direct current electric network, so that the electric energy can be provided for the direct current electric equipment connected to the direct current electric network.

In addition, step S920 may be further employed to ensure stability of power supply.

In step S920, one or more first power storage devices are configured based on the type and performance of the energy source and the demand of the dc power consuming device; and controlling the electric energy collected from the energy source according to a preset scheduling control strategy and stored in the one or more first electric storage devices, converting the direct current electric energy in the first electric storage devices into direct current with a preset specification and transmitting the direct current electric energy through a direct current power utilization network.

Since obtaining the dc power of the predetermined specification directly from the energy source does not necessarily ensure that sufficient dc power is provided or ac utility power may be enabled, for this reason, how many first power storage devices are configured may be determined according to the type and performance of the energy source used and the requirements of the dc power consuming device. Here, the first electrical storage device is a device that collects and stores electrical energy from an energy source. Therefore, the electric energy of the renewable energy source can be stored, and the trough commercial power of the alternating current commercial power can also be stored to supply power for the direct current electric equipment, so that the effect of fully utilizing the energy is achieved. Of course, when the first power storage device cannot store enough dc power but needs to store a certain amount of dc power for use in emergency, the ac mains supply other than the valley mains supply may be converted into dc power and stored in the first power storage device.

In addition, regarding step S910 and step S920, on one hand, either step may be adopted, that is, the electric energy may be collected from the energy source and then supplied to the dc electric device, or the electric energy collected from the energy source may be stored first and then supplied to the dc electric device. On the other hand, both steps S910 and S920 may be performed, so that the energy source electric energy may be collected to directly supply power to the dc power utilization device, or the first power storage device may be used to supply power, so as to better ensure the stability of power supply, and further, the renewable energy and/or the valley commercial power may be fully utilized.

Alternatively, step S930 may be further adopted to store the dc power transmitted in the dc power grid in a second power storage device connected to the dc power grid. In this way, the dc power transmitted in the dc power network can be stored, on one hand, when sufficient power is obtained through steps S910 and S920, and the power transmitted on the dc power network exceeds the power required by the dc power device, the waste of power can be avoided, and on the other hand, this provides another power storage method, which can also be used as a power supply for the dc power device. When step S910 is adopted, both step S920 and step S930 may be adopted, or only one of them may be adopted. When step S920 is employed instead of S910, S930 may be employed or S930 may not be employed.

Next, in step S940, the input and output electric quantity related data of the device that collects electric energy from the energy source, and/or the input and output electric quantity related data of the first electric storage device, and/or the input and output electric quantity related data of the second electric storage device are acquired as the first information. In step S970, the input and output of the device that harvests electric energy from the energy source, and/or the input and output of the first electrical storage device, and/or the input and output of the second electrical storage device are controlled according to a predetermined schedule control strategy based on the first information.

Through step S940, the ability to collect electric energy from the device that collects electric energy from the energy source and the ability to output electric energy, and the storage ability and the power supply ability of the first and second storage devices can be known, whereby at step S970, whether the device that collects electric energy from the energy source and outputs electric energy, and which energy sources to collect electric energy from when there are a plurality of energy sources can be controlled, whether the first and second storage devices store electric energy, how much electric energy to store, whether to output electric energy, and how much electric energy to output can be controlled, according to a predetermined schedule control strategy. For example, when the energy harvested from the solar energy source is sufficient, then harvesting ac power from the ac mains is not enabled; when the first and/or second electric storage devices can provide enough electric energy for the direct-current electric equipment, the device for collecting the electric energy from the energy source does not need to output the electric energy; stopping continuing to charge the first and/or second electrical storage device when the first and/or second electrical storage device has stored electric energy of a rated capacity; when the electric energy collected from the renewable energy source cannot enable the first and/or second electric storage equipment to store electric energy to reach the rated capacity, the renewable energy source and the alternating current commercial power can be selectively used for respectively providing certain electric storage capacity for the first and/or second electric storage equipment; when the first and/or second electrical storage device has sufficient electrical storage, it may be controlled to output electric energy or not to output electric energy, and when the first and/or second electrical storage device does not have sufficient electrical storage, it may be controlled not to output electric energy.

Because the power supply capacities of different energy sources are different at different dates and times, for example, for a solar energy source, the solar energy source can only collect electric energy in the daytime and sunny days and cannot collect electric energy at night; for alternating current commercial power, the electricity consumption is large in the daytime and is in the trough of electricity consumption at night, and a large amount of generated electricity is wasted; in addition, the control of the load devices such as the dc power consuming devices may be different depending on the date and time. Therefore, the first information may further include date and time information for controlling the dc powered device, and when the energy source includes an AC energy source, the first information further includes date and time information for using the AC energy source.

In addition, in order to further more accurately perform power supply control, step S950 may be further adopted to obtain self-state information of the device acquiring electric energy from the energy source, and/or the first energy storage device, and/or the second energy storage device, where the self-state information may include state information of each component in operation, standby, failure, and the like. . Thus, in the above step S970, when the control is performed according to the scheduling control policy, the first information based on may further include the self-state information of each device obtained in the step S950.

In addition, in order to further improve the control accuracy, step S960 may also be adopted to collect environmental data around the DC energy source, because the environment around the DC energy source directly affects how much electric energy is collected therefrom, for example, more electric energy can be collected from the solar energy source in sunny days, and less electric energy is collected in cloudy days. When the wind power is large, the wind power generation equipment can provide more electric energy, and when the wind power is small, the wind power generation equipment provides less electric energy. Therefore, in the above step S970, when controlling according to the scheduling control strategy, the first information based on may further include the environmental data around the DC energy source collected in step S960.

In the dc power supply method of the present invention, the predetermined scheduling control policy may be set as needed, and for example, the device may include the following policies:

strategy 1, when the effective power of a renewable energy source (such as a solar battery pack) is larger than the total energy power required by all current direct-current electric equipment, determining that a DC energy collection module works, collecting direct current from the renewable energy source to supply power to the direct-current electric equipment, and determining that an AC energy collection module does not work;

strategy 2, on the basis of strategy 1, when the available power of the renewable energy source is larger than the total energy consumption power required by all current energy consumption subsystems and the difference between the available power and the total energy consumption power is larger than a first set threshold (at this time, the renewable energy source can be considered to have available power), the renewable energy source is used for charging one or more first and/or second electric storage devices with the minimum residual capacity. The method is mainly determined according to the size of the effective power of the renewable energy source and the power required by charging; the first set threshold may be set manually as needed.

Strategy 3, when the effective power of the renewable energy source is smaller than the total energy power required by all the current direct-current electric equipment, the direct-current electric equipment uses the stored electricity of the first and/or second electric storage equipment, and when all the electric storage equipment does not store electricity, alternating current is collected from alternating current mains supply and converted into direct current to supply power to the direct-current electric equipment; if the total output power of all the electric storage equipment is less than the total energy power required by all the direct-current electric equipment, partially collecting alternating current from alternating current commercial power to supply power for the direct-current electric equipment;

strategy 4, on the basis of strategy 3, when alternating current needs to be collected from alternating current mains supply to supply power to the direct current electric equipment, if the alternating current electric equipment is currently in a non-trough mains supply time period, some direct current electric equipment which is allowed to be turned off is turned off according to preset setting;

strategy 5, based on strategy 3, when the available power of the renewable energy source is greater than the second set threshold, charging the one or more first and/or second electrical storage devices with the least amount of remaining power with the renewable energy source. Here, the second setting threshold may be set manually as needed.

And strategy 6, when alternating current is required to be collected from the alternating current mains supply to supply power to the direct current electric equipment, if the alternating current electric equipment is currently in a mains supply trough time period and the sum of the electric storage quantities of all the electric storage equipment is less than the sum of the electric consumption quantities required by normal use of all the direct current electric equipment within a set first time period T1 (for example, 3 days), charging one or more first and/or second electric storage equipment with the minimum residual electric quantity by using the alternating current mains supply.

Strategy 7, if the sum of the electric storage quantities of all the electric storage devices is larger than or equal to the sum of the electric quantities of all the direct current electric equipment required for normal use in a set first time period T1 (for example, 3 days) but smaller than the sum of the electric quantities of all the direct current electric equipment required for normal use in a set second time period T2 (for example, 5 days), the direct current electric equipment is powered by using alternating current commercial power, but the first and/or second electric storage devices are not charged, wherein T2 is larger than T1.

It should be noted that, in order to ensure the implementation of the scheduling control strategy, the configuration of the capacity (including power, storage capacity, etc.) of the device for collecting electric energy from the energy source and the first and/or second power storage devices needs to be carefully calculated to be suitable for the demand (power, power consumption, etc.) of the dc power-consuming device.

Although the present invention has been described in connection with the specified embodiments, it is not intended to be limited to the specific form set forth herein. Rather, the scope of the invention is limited only by the appended claims. In the claims, the term "comprising" does not exclude the presence of other elements or steps. Furthermore, although individual features may be included in different claims, these may possibly advantageously be combined, and the inclusion in different claims does not imply that a combination of features is not feasible and/or advantageous. Furthermore, singular references do not exclude a plurality. Thus, the meaning of "a", "first", "second", etc. does not exclude a plurality. Furthermore, reference signs in the claims shall not be construed as limiting the scope.

While the foregoing is directed to embodiments of the present invention, it will be appreciated that various modifications, alterations, and adaptations of the invention may be made by those skilled in the art without departing from the spirit of the invention, and that such modifications, alterations, and adaptations are intended to be within the scope of the present application.

Claims

1. A domestic dc system, comprising:

an energy harvesting subsystem comprising one or more energy harvesting modules, the energy harvesting modules comprising a DC energy harvesting module and/or an AC energy harvesting module; wherein,

the DC energy collection module is configured to collect direct current from a DC energy source, and comprises an energy collection DC-DC conversion unit which is configured to convert the direct current with floating voltage into direct current with a preset specification;

the AC energy collection module is configured to collect alternating current from an AC energy source and comprises an energy collection AC-DC conversion unit which is configured to convert the alternating current into direct current with a preset specification;

an energy storage subsystem comprising one or more energy storage modules, the energy storage modules comprising a first energy storage module and/or a second energy storage module, wherein,

the first energy storage module comprises a first charging unit, a first electricity storage unit and a first discharging DC-DC conversion unit; wherein,

the first charging unit comprises an alternating current charging unit and/or a direct current charging unit, the alternating current charging unit is configured to charge the first power storage unit by Alternating Current (AC), and the direct current charging unit is configured to charge the first power storage unit by Direct Current (DC);

the first power storage unit is configured to receive charging of the first charging unit and store electric energy;

the first discharging DC-DC conversion unit is configured to convert the direct current with the floating voltage provided by the first power storage unit into direct current with a preset specification and output the direct current;

the second energy storage module comprises a second charging unit, a second electricity storage unit and a second discharging DC-DC conversion unit; wherein,

the second charging unit is configured to charge the second power storage unit with direct current DC;

the second power storage unit is configured to receive charging of the second charging unit and store electric energy;

the second discharging DC-DC conversion unit is configured to convert the direct current with the floating voltage provided by the second power storage unit into direct current with a predetermined specification and output the direct current;

the direct current power utilization network is configured to transmit direct current output by the energy collection module of the energy collection subsystem and/or the energy storage module of the energy storage subsystem to the direct current power utilization equipment, and comprises at least two conducting wires, wherein one conducting wire is a positive electrode, and the other conducting wire is a negative electrode;

the scheduling control subsystem comprises a scheduling module, a plurality of electric quantity data acquisition modules, one or a plurality of distributed communication modules and a plurality of control modules, wherein,

the electric quantity data acquisition module is connected with the distributed communication module through a signal line, and is configured to acquire electric quantity related data from the input end and/or the output end of an AC energy acquisition module, the input end and/or the output end of a DC energy acquisition module, the input end and/or the output end of a first charging unit and the input end and/or the output end of a first discharging DC-DC conversion unit of a first energy storage module, the input end and/or the output end of a second charging unit and the input end and/or the output end of a second discharging DC-DC conversion unit of the second energy storage module of the energy storage module, and send the electric quantity related data to the distributed communication module through the signal line;

the distributed communication module is configured to be respectively communicated with the scheduling module and/or other distributed communication modules through a communication bus and is connected with the electric quantity data acquisition module and the control module through signal lines; the distributed communication module sends the received electric quantity related data to the scheduling module through a communication bus, receives a control instruction sent by the scheduling module through the communication bus, and sends the received control instruction to the control module through a signal line;

the scheduling module is configured to generate a control instruction for controlling the acquisition of the electric energy and the output of the direct current by the energy acquisition subsystem and the storage of the electric energy and the output of the direct current by the energy storage subsystem according to a predetermined scheduling control strategy based on first information, wherein the first information comprises the electric quantity related data;

the control module comprises an energy collecting control module and an energy storage control module, wherein,

the energy acquisition control module is configured to control the acquisition of electric energy and the output of direct current by the energy acquisition module according to a control instruction received from the distributed communication module;

the energy storage control module is configured to control the storage of electric energy and the output of direct current of the first energy storage module and/or the second energy storage module of the energy storage modules according to the control instruction received from the distributed communication module;

the input end of the DC energy collection module is electrically connected with a DC energy source through the energy collection control module, the input end of the AC energy collection module is electrically connected with an AC energy source through the energy collection control module, the DC energy collection module and the AC energy collection module respectively collect electric energy from the DC energy source and the AC energy source under the control of the energy collection control module, and the electric output ends of the DC energy collection module and the AC energy collection module are respectively electrically connected with the direct-current power utilization network to output direct current with the preset specification to the direct-current power utilization network;

the output end of a first charging unit of the first energy storage module is electrically connected with the input end of a first electricity storage unit through the energy storage control module, the input end of a first discharging DC-DC conversion unit is electrically connected with the output end of the first electricity storage unit through the energy storage control module, and the energy storage control module controls the output end of the first charging unit and the input end of the first discharging DC-DC conversion unit to be switched on or switched off;

the input end of a second charging unit of the second energy storage module is connected with the connecting end of the second energy storage module, the output end of the second charging unit is connected with the input end of the second energy storage unit through the energy storage control module, the input end of a second discharging DC-DC conversion unit is connected with the output end of the second energy storage unit through the energy storage control module, the output end of the second discharging DC-DC conversion unit is connected with the connecting end of the second energy storage module, and the energy storage control module controls the connection or disconnection of the output end of the second charging unit and the input end of the second discharging DC-DC conversion unit; the second energy storage module is connected with the direct current power utilization network through a connecting end, and the connecting end is an input end and an output end of the second energy storage module;

2. Civil direct current system according to claim 1,

the scheduling module comprises a clock unit, a communication unit and a central processing unit, wherein,

the clock unit is configured to provide date and time information;

the communication unit is configured to communicate with the communication units of the distributed communication module and/or other scheduling modules through a communication bus, and receive the electric quantity related data sent from the distributed communication module;

the central processing unit is configured to generate control instructions for the energy collection module and/or the energy storage module according to a predetermined scheduling control strategy according to first information and send the control instructions to the relevant distributed communication modules through a communication bus, wherein the first information further comprises date and time information provided by the clock unit.

3. The system according to claim 1 or 2,

at least one energy acquisition control module, at least one distributed communication module and at least one electric quantity data acquisition module in the dispatching control subsystem are arranged on the side of the energy acquisition module;

at least two energy storage control modules, at least one distributed communication module and at least one electric quantity data acquisition module in the dispatching control subsystem are arranged on the side of the energy storage modules.

4. The system according to any one of claims 1-3,

the distributed communication module is also respectively connected with the energy acquisition DC-DC conversion unit and/or the energy acquisition AC-DC conversion unit in the energy acquisition module, and the first charging unit and the first discharging DC-DC conversion unit of the first energy storage module and/or the second charging unit and the second discharging DC-DC conversion unit of the second energy storage module in the energy storage module through signal lines,

the energy-collecting DC-DC conversion unit and/or the energy-collecting AC-DC conversion unit in the energy-collecting module send self state information to the dispatching module through the distributed communication module and the communication bus, and/or receive the control instruction from the dispatching module through the communication bus and the distributed communication module, enable the dispatching module to be in a working or standby state according to the control instruction, and/or adjust output voltage according to the control instruction; a first charging unit and a first discharging DC-DC conversion unit in a first energy storage module of the energy storage module and/or a second charging unit and a second discharging DC-DC conversion unit in a second energy storage module send self state information to the scheduling module through the distributed communication module and the communication bus, and/or receive the control instruction from the scheduling module through the communication bus and the distributed communication module and enable the scheduling module to be in a working state or a standby state according to the control instruction, and/or the first discharging DC-DC conversion unit and the second discharging DC-DC conversion unit adjust output voltage according to the control instruction;

the first information also includes self-state information of each component.

5. The system of any of claims 1-4, further comprising:

at least one environmental data collection module comprising an environmental sensor and a data transmission device connected to the environmental sensor, wherein the environmental sensor is placed in proximity to an energy source and configured to collect environmental data around the energy source, the data transmission device is connected directly to the communication bus or to the distributed communication module via a signal line, and transmits the collected environmental data to the scheduling module via the signal line, the distributed communication module, and the communication bus or directly via a communication bus,

wherein the first information further comprises the environmental data.

6. The system according to any one of claims 1 to 5,

the direct current electric equipment comprises an electric communication unit and/or an electric control unit,

the power utilization communication unit is connected with the communication bus, the power utilization control unit is connected with the power utilization communication unit through a signal wire,

the direct current electric equipment sends self state information to the scheduling module through the communication bus or through the electric communication unit and the communication bus;

the power utilization control unit receives a control instruction sent from the scheduling module through the communication bus or through the power utilization communication unit and the communication bus, and controls the direct-current power utilization equipment according to the control instruction.

7. The system of any of claims 1-6, further comprising:

an information subsystem comprising at least one gateway device, and one or more information terminal devices, wherein,

the gateway equipment is connected with the direct current power utilization network and is connected with an information subsystem and/or an upper management system of other remote civil direct current systems and other information terminal equipment on the Internet through the Internet;

the information terminal equipment is connected with the direct current power utilization network and the gateway equipment, the information terminal equipment and the scheduling module are connected through a communication network or the communication bus which is configured independently to form an information network.

8. A domestic dc system, comprising:

the DC energy collection module is configured to collect direct current from a DC energy source, and comprises an energy collection DC-DC conversion unit configured to convert the direct current with floating voltage into direct current with a first specification;

the AC energy collection module is configured to collect alternating current from an AC energy source, and comprises an energy collection AC-DC conversion unit configured to convert the alternating current into direct current of a first specification;

an energy storage subsystem comprising one or more first energy storage modules comprising a first charging unit, a first electrical storage unit, and a first discharging DC-DC conversion unit; wherein,

the first discharging DC-DC conversion unit is configured to convert the direct current with the floating voltage provided by the first power storage unit into direct current with a first specification and output the direct current;

the energy utilization subsystem comprises at least one power synthesis module, a direct current power utilization network and one or more direct current power utilization devices, wherein the input end of the power synthesis module is connected to the output end of the energy acquisition module or the energy storage module to receive the direct current with the first specification, the direct current with the first specification is converted into the direct current with the second specification and is combined and output to the direct current power utilization network for transmitting the direct current, and the input end of each direct current power utilization device is connected to the direct current power utilization network; the direct current power utilization network comprises at least two leads, wherein one lead is a positive pole, and the other lead is a negative pole;

a scheduling control subsystem comprising one or more scheduling modules, a plurality of electricity-quantity data collection modules, one or more distributed communication modules, and a plurality of control modules, wherein,

the electric quantity data acquisition module is connected with the distributed communication module through a signal line, and is configured to acquire electric quantity related data from the input end and/or the output end of an AC energy acquisition module, the input end and the output end of a DC energy acquisition module, the input end and/or the output end of a first charging unit of the first energy storage module and the input end and/or the output end of a first discharging DC-DC conversion unit of the energy acquisition module respectively, and send the electric quantity related data to the distributed communication module through the signal line;

the distributed communication module is configured to communicate with the scheduling module and/or other distributed communication modules through a communication bus, and is connected with the electric quantity data acquisition module and the control module through signal lines; the distributed communication module sends the received electric quantity related data to the scheduling module through a communication bus, receives a control instruction sent by the scheduling module through the communication bus, and sends the received control instruction to the control module through a signal line;

the energy storage control module is configured to control the storage of electric energy and the output of direct current by the energy storage module according to a control instruction received from the distributed communication module;

the input end of the DC energy collection module is electrically connected with a DC energy source through the energy collection control module, the input end of the AC energy collection module is electrically connected with an AC energy source through the energy collection control module, and the DC energy collection module and the AC energy collection module collect electric energy from the energy source under the control of the energy collection control module;

9. The system of claim 8,

the power synthesis module comprises two or more energy utilization DC-DC conversion units, the energy utilization DC-DC conversion units are configured to convert the direct current of the first specification output by the energy collection module and/or the first energy storage module into the direct current of the second specification, and the input end of one energy utilization DC-DC conversion unit is electrically connected with the output end of one energy collection module or one first energy storage module; the output ends of the energy utilization DC-DC conversion units are connected in parallel to serve as the output of the power synthesis module.

10. The system of claim 8 or 9,

the clock unit is configured to provide date and time information;

the central processing unit is configured to generate a control instruction for the energy collection module and/or the energy storage module according to a predetermined scheduling control strategy according to first information, and send the control instruction to the relevant distributed communication module through a communication bus, wherein the first information further comprises date and time information provided by the clock unit.

11. The system according to any one of claims 8-10,

the energy utilization DC-DC conversion unit is connected with the distributed communication unit through a signal line and is configured to send self state information to the scheduling module through the distributed communication module via the communication bus and/or receive a control instruction from the scheduling module through the distributed communication module via the communication bus and adjust the output voltage of the scheduling module according to the control instruction.

12. A method of dc power supply, comprising:

configuring the energy source based on the type and performance of the energy source and the requirement of the direct current electric equipment; controlling the collection of electric energy from an energy source according to a preset scheduling control strategy, converting the collected electric energy into direct current with a preset specification and transmitting the direct current through a direct current power utilization network; and/or

Configuring one or more first electrical storage devices based on the type and performance of the energy source and the demand of the direct current electric equipment; controlling the electric energy collected from the energy source according to a preset scheduling control strategy and stored in the one or more first electric storage devices, converting the direct current electric energy in the first electric storage devices into direct current with a preset specification and transmitting the direct current electric energy through a direct current power utilization network;

acquiring input and output electric quantity related data of equipment for acquiring electric energy from an energy source and/or input and output electric quantity related data of first electric storage equipment as first information;

controlling input and output of a device for collecting electric energy from the energy source and/or input and output of the first electrical storage device according to a predetermined scheduling control strategy based on the first information;

and transmitting the direct current with the preset specification to direct current electric equipment connected to the direct current electric network through the direct current electric network.

13. The method of claim 12, further comprising:

storing the direct current electrical energy transmitted in the direct current electricity network in a second electrical storage device connected to the direct current electricity network,

the step of controlling the input and output of the devices for collecting electric energy from different energy sources and/or the output of the direct current of the first electrical storage device according to a predetermined dispatch control strategy based on the first information is:

controlling input and output of devices that harvest electrical energy from different energy sources, and/or input and output of a first electrical storage device, and input and output of a second electrical storage device, according to a predetermined dispatch control strategy based on the first information;

wherein the first information further includes data relating to an amount of electric power input and output from the second electric storage device.

14. The method of claim 12 or 13, further comprising:

the first information further includes date and time information for control of the dc powered device, and when the energy source includes an AC energy source, the first information further includes date and time information for use of the AC energy source.

15. The method according to any of claims 12-14, further comprising:

acquiring self state information of equipment for acquiring electric energy from an energy source and/or first energy storage equipment and/or second electric storage equipment,

wherein the first information further comprises self-state information of the device which collects energy from the energy source, and/or the first energy storage device, and/or the second electrical storage device.

16. The method according to any of claims 12-15, further comprising:

collecting environmental data around the energy source;

wherein the first information further comprises environmental data surrounding the acquired energy source.

17. The method of any one of claims 12-16,

the predetermined scheduling control policy includes:

strategy 1, when the effective power of a renewable energy source is larger than the total energy power required by all the direct current electric equipment at present, determining to collect direct current from the renewable energy source to supply power to all the direct current electric equipment;

strategy 2, on the basis of strategy 1, when the effective power of the renewable energy source is larger than the total energy consumption required by all the current direct-current electric equipment and the difference between the effective power and the total energy consumption is larger than a first set threshold value, charging one or more first electric storage equipment and/or second electric storage equipment with the minimum residual quantity by using the renewable energy source;

strategy 5, based on strategy 3, when the available power of the renewable energy source is greater than the second set threshold, charging the one or more first and/or second electrical storage devices with the least amount of remaining power with the renewable energy source.

Strategy 6, when alternating current is required to be collected from alternating current mains supply to supply power to the direct current electric equipment, if the alternating current electric equipment is currently in a mains supply trough time period and the sum of the electric storage quantities of all the electric storage equipment is less than the sum of the electric consumption quantities required by normal use of all the direct current electric equipment in a set first time period T1, charging one or more first and/or second electric storage equipment with the minimum residual electric quantity by using the alternating current mains supply;

strategy 7, if the sum of the electric storage quantities of all the electric storage devices is larger than or equal to the sum of the electric quantities of all the direct-current electric appliances required for normal use in the set first time period T1 but smaller than the sum of the electric quantities of all the direct-current electric appliances required for normal use in the set second time period T2, the direct-current electric appliances are powered by using the alternating-current commercial power, but the first and/or second electric storage devices are not charged, wherein T2 is larger than T1.