CN218449527U - Power supply system - Google Patents
Power supply system Download PDFInfo
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- CN218449527U CN218449527U CN202222024635.8U CN202222024635U CN218449527U CN 218449527 U CN218449527 U CN 218449527U CN 202222024635 U CN202222024635 U CN 202222024635U CN 218449527 U CN218449527 U CN 218449527U
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Abstract
The utility model discloses a power supply system, which comprises an AC cabinet, a rectifier cabinet, a DC cabinet and at least one charging and discharging device which are electrically connected in sequence, wherein each charging and discharging device is electrically connected with the DC cabinet through a DC bus; the alternating current cabinet is used for carrying out alternating current distribution on the rectifier cabinet; the rectifier cabinet is used for rectifying the received alternating current into direct current and transmitting the direct current to the direct current cabinet; the direct current cabinet provides direct current for the charging and discharging equipment through the direct current bus, and the charging and discharging equipment charges and discharges the battery through the direct current. According to the utility model discloses a power supply system is through having added rectifier cabinet and direct current cabinet between AC cabinet and charging and discharging equipment to change the generating line that will input charging and discharging equipment into direct current generating line by alternating current generating line, and direct current generating line can change the voltage of input, and along with direct current power supply system's voltage promotion, cable current descends, and the line loss reduces, can improve power supply efficiency. Moreover, due to the adoption of a modular structure, the capacity expansion of the power supply system is very convenient, and the specific number of the alternating current cabinet, the rectifier cabinet and the direct current cabinet can be adjusted according to actual needs.
Description
Technical Field
The utility model belongs to the technical field of the power supply technique and specifically relates to a power supply system is related to.
Background
As shown in fig. 1, a power supply system of a lithium battery detection device generally includes an ac cabinet and a charging and discharging device, and current is directly input to the charging and discharging device through an ac bus after being distributed by ac. The power supply system has low power supply reliability and efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an efficient power supply system.
According to the utility model discloses power supply system, include: an alternating current cabinet; the rectifier cabinet is electrically connected with the alternating current cabinet; the direct current cabinet is electrically connected with the rectifier cabinet; each charging and discharging device is electrically connected with the direct current cabinet through a direct current bus; the alternating current cabinet is used for carrying out alternating current distribution on the rectifier cabinet; the rectifier cabinet is used for rectifying the received alternating current into direct current and transmitting the direct current to the direct current cabinet; the direct current cabinet provides direct current for the charge and discharge equipment through the direct current bus, and the charge and discharge equipment charges and discharges a battery through the direct current.
According to some embodiments of the present invention, each of the charging and discharging devices includes at least one DC/DC module, the DC/DC module is electrically connected with the DC bus and the battery, respectively.
According to some embodiments of the invention, the DC/DC module is a bidirectional DC/DC module.
According to some embodiments of the invention, at least one AC/DC module is provided in the rectifier cabinet.
According to some embodiments of the invention, the number of AC/DC modules is multiple, and the multiple AC/DC modules are connected in parallel with each other.
According to some embodiments of the invention, the AC/DC module is a unidirectional AC/DC module or a bidirectional AC/DC module.
According to the utility model discloses a some embodiments still include the control subassembly, the control subassembly is used for the control exchange the cabinet the rectifier cabinet with the state of at least one of direct current cabinet three.
According to the utility model discloses a some embodiments, the control subassembly includes three monitoring module, and is three monitoring module monitors respectively exchange the cabinet the rectifier cabinet the running state of direct current cabinet.
According to some embodiments of the utility model, be provided with energy memory in the direct current cabinet.
According to some embodiments of the invention, the energy storage device comprises: the energy storage battery is electrically connected with the direct current bus; and the battery control box is electrically connected with the energy storage battery.
According to the utility model discloses power supply system has following beneficial effect at least: through having added rectifier cabinet and direct current cabinet between AC cabinet and charging and discharging equipment to change the generating line of input charging and discharging equipment into direct current generating line by the AC generating line, and direct current generating line can change the voltage of input, and along with direct current power supply system's voltage promotion, cable current descends, and the line loss reduces, can improve power supply efficiency. Moreover, due to the adoption of a modular structure, the capacity expansion of the power supply system is very convenient, and the specific number of the alternating current cabinet, the rectifier cabinet and the direct current cabinet can be adjusted according to actual needs.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a power supply system in the related art;
fig. 2 is a schematic structural diagram of a power supply system according to an embodiment of the present invention;
reference numerals:
the system comprises an alternating current cabinet 100, a rectifier cabinet 200, a direct current cabinet 300, a battery control box 310, an energy storage battery 320, a charging and discharging device 400 and a monitoring module 500.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.
DC/DC: in a dc circuit, a device for converting a dc voltage or current into a voltage or current required by a user terminal, also called a dc chopper, can control the magnitude of an output effective voltage by adjusting the duty ratio of the dc power through a pulse width modulation technique.
AC/DC: the power flow direction of the device for converting alternating current into direct current can be unidirectional or bidirectional.
As shown in fig. 2, the power supply system according to the embodiment of the present invention includes an ac cabinet 100, a rectifier cabinet 200, and a dc cabinet 300, which are electrically connected in sequence, and at least one charging and discharging device 400, wherein each charging and discharging device 400 is electrically connected to the dc cabinet 300 through a dc bus; the alternating current cabinet 100 is used for alternating current distribution to the rectifier cabinet 200; the rectifier cabinet 200 is used for rectifying the received alternating current into direct current and transmitting the direct current to the direct current cabinet 300; the dc cabinet 300 provides dc power to the charging and discharging device 400 through a dc bus, and the charging and discharging device 400 charges and discharges the battery through the dc power.
Compare in current power supply system, the utility model discloses power supply system has added rectifier cabinet 200 and direct current cabinet 300 between AC cabinet 100 and charging and discharging equipment 400 to change the generating line that will input charging and discharging equipment 400 into direct current bus by the alternating current bus, and direct current bus can change the voltage of input, and along with direct current power supply system's voltage promotion, cable current descends, and the line loss reduces, can improve power supply efficiency. Moreover, because of the modular structure, the capacity expansion of the power supply system is very convenient, and the specific number of the alternating current cabinet 100, the rectifier cabinet 200 and the direct current cabinet 300 can be adjusted according to actual needs. Meanwhile, during construction, the number of modules can be gradually increased according to the number of the devices, so that the load rate of each module is improved as much as possible, the cost is reduced, and the space is saved.
In some embodiments of the present invention, the power supply system further comprises a monitoring component, and the monitoring component is used for monitoring the state of at least one of the ac cabinet, the rectifier cabinet and the dc cabinet. The monitoring component is used for monitoring the state of at least one of the alternating current cabinet 100, the rectifier cabinet 200 and the direct current cabinet 300, ensuring that the monitoring component can detect the state in time when a corresponding cabinet body fails, and taking corresponding treatment measures to prevent safety accidents or influence the normal work of the system. More specifically, as shown in fig. 2, the monitoring assembly includes three monitoring modules 500, and the three monitoring modules 500 respectively monitor the operating states of the ac cabinet 100, the rectifier cabinet 200, and the dc cabinet 300, so as to ensure that the operating states of the respective cabinets can be monitored in real time, and the power supply system can operate safely. It is understood that the specific number of the monitoring modules 500 is not limited, and may be one, two or more.
In some embodiments of the present invention, the charging and discharging device 400 includes at least one DC/DC module (not shown); one end of the DC/DC module is electrically connected to the DC cabinet 300, and the other end of the DC/DC module is electrically connected to the battery. When the DC cabinet 300 supplies power to the DC/DC module, the DC/DC module controls the battery to charge and discharge. Furthermore, in order to better realize the charging and discharging control of the DC/DC module on the battery, the DC/DC module adopts a bidirectional DC/DC module. The energy required by charging and discharging is different due to the state difference among the batteries, and due to the adoption of the bidirectional DC/DC module, the energy among the batteries charged in a single charging and discharging device can be automatically adjusted and consumed in a self-adaptive manner, and if the energy cannot be consumed, redundant electric energy can be fed back to the direct current bus to carry out energy recovery. Meanwhile, the bidirectional DC/DC module can avoid overload, improve the safety of equipment and reduce the loss of electric energy.
As shown in fig. 2, in some embodiments of the present invention, an energy storage device is disposed in the dc cabinet 300. When the battery is discharged, the charging and discharging device 400 may feed back the energy discharged by the battery to the dc cabinet 300 through the dc bus, so that the energy is stored in the energy storage device; when the battery in the charging and discharging device 400 is charged or the power grid has a power failure, the electric energy of the energy storage device can be directly supplied to the charging and discharging device 400, so that the uninterrupted power supply is ensured, and the reliability of power supply is improved. Moreover, when the battery in the charging and discharging device 400 discharges, energy only needs to be fed back to the energy storage device from the charging and discharging device 400, and energy does not need to be fed back to the power grid, so that an energy feedback path is reduced, line loss is reduced, and efficiency is improved.
In some examples, the energy storage device includes a battery control box 310 and an energy storage battery 320. The energy storage battery 320 is electrically connected with the battery control box 310 and the direct current bus respectively; the battery control box 310 is used for controlling charging and discharging of the energy storage battery 320. The energy storage battery 320 may be directly connected in parallel to a load terminal as a power source, and when the battery in the charging and discharging device 400 discharges or energy is fed back, the energy may be directly stored in the storage battery; when the battery in the charging and discharging device 400 is charged or the power grid is powered off, the electric energy of the energy storage battery 320 can be directly supplied to the load, so that the uninterrupted power supply is ensured, and the reliability of power supply is improved. Moreover, when the battery in the charging and discharging device 400 discharges, energy only needs to be fed back from the charging and discharging device 400 to the energy storage battery 320 to charge the energy storage battery 320, and does not need to be fed back to the power grid, so that an energy feedback path is reduced, line loss is reduced, and efficiency is improved.
As shown in fig. 2, in some embodiments of the present invention, at least one AC/DC module is disposed within the rectifier cabinet 200. The AC/DC module is used to convert the AC power provided by the AC cabinet 100 into DC power and provide the DC power to the DC cabinet 300.
In some embodiments of the present invention, the number of AC/DC modules is plural, and the plural AC/DC modules are connected in parallel to each other. By arranging a plurality of AC/DC modules in parallel in the rectifier cabinet 200, the conversion efficiency of the AC/DC power supply is improved.
In some embodiments of the present invention, the AC/DC module is a unidirectional AC/DC module or a bidirectional AC/DC module. When adopting one-way AC/DC module, the utility model provides a power supply system has following beneficial effect:
1. the energy storage battery 320 reserves part of electric charge, when the public power grid is powered off, the energy storage battery 320 can supply power to the charging and discharging device 400, so that uninterrupted power supply is provided for important direct current loads of customers, and the key services of the customers are ensured to be continuously carried out;
2. the energy storage battery 320 reserves partial capacity space, and can provide the capacity of absorbing feedback energy when the feedback energy of the direct current load is larger than the consumption of other loads;
3. during the peak period of power consumption, the energy storage battery 320 discharges, and during the valley period of power consumption, the energy storage battery 320 charges, thereby reducing the peak capacity of the transformer, reducing the capacity electricity charge, and improving the power consumption capability of the off-peak power grid of the direct current load.
When adopting two-way AC/DC module, the utility model provides a power supply system has following beneficial effect:
1. the energy storage battery 320 reserves part of electric charge, when the public power grid is powered off, the energy storage battery 320 can supply power to the charging and discharging equipment 400, so that uninterrupted power supply is provided for important alternating current and direct current loads of customers, and the key services of the customers are ensured to be continuously carried out;
2. the energy storage battery 320 reserves partial capacity space and can provide the capacity of absorbing feedback energy when the feedback energy of the alternating current/direct current load is larger than the consumption of other loads;
3. during the peak period of power consumption, the energy storage battery 320 discharges, and during the valley period of power consumption, the energy storage battery 320 charges, thereby reducing the peak capacity of the transformer, reducing the capacity electricity charge, and improving the power consumption capability of the alternating current/direct current load off-peak power grid.
As shown in fig. 2, in some embodiments of the present invention, the output terminal of the ac cabinet 100 is provided with a control switch. The control switch may adopt a switching element such as a relay, and is used for controlling the working state of the ac cabinet 100; when the operation state of the ac cabinet 100 is found to be abnormal, the operation of the ac cabinet 100 may be stopped by turning off the control switch.
According to the utility model discloses power supply system compares in current power supply system, and input charging and discharging equipment 400's generating line changes direct current generating line into by alternating current generating line, and direct current generating line can change the voltage of input, and along with direct current power supply system's voltage promotes, and cable current descends, and the line loss reduces to power supply efficiency has been improved. Meanwhile, since the energy storage battery 320 is disposed in the dc cabinet 300, when the charging and discharging device 400 discharges, energy is directly fed back to the energy storage battery 320 to charge the energy storage battery 320 without being fed back to the power grid, thereby reducing an energy feedback path, reducing line loss, and improving efficiency. When meeting the unexpected outage of the power grid, the energy storage battery 320 can supply power for the direct current bus, so that the normal operation of the charging and discharging equipment 400 is ensured, and the power supply reliability is improved. In addition, since energy is not fed back to the grid during discharging, but only fed back to the energy storage battery 320, the bidirectional AC/DC module can be replaced by a unidirectional AC/DC module, so as to reduce the cost.
In the description herein, references to the description of the term "one embodiment," "a further embodiment," "some specific embodiments," or "some examples," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A power supply system, comprising:
an alternating current cabinet;
the rectifier cabinet is electrically connected with the alternating current cabinet;
the direct current cabinet is electrically connected with the rectifier cabinet;
each charging and discharging device is electrically connected with the direct current cabinet through a direct current bus;
the alternating current cabinet is used for carrying out alternating current distribution on the rectifier cabinet; the rectifier cabinet is used for rectifying the received alternating current into direct current and transmitting the direct current to the direct current cabinet; the direct current cabinet provides direct current for the charge and discharge equipment through the direct current bus, and the charge and discharge equipment charges and discharges a battery through the direct current.
2. The power supply system of claim 1, wherein each of said charging and discharging devices comprises at least one DC/DC module electrically connected to said DC bus and said battery, respectively.
3. The power supply system of claim 2, wherein the DC/DC module is a bidirectional DC/DC module.
4. The power supply system of claim 1, wherein at least one AC/DC module is disposed within the rectification cabinet.
5. The power supply system according to claim 4, wherein the number of the AC/DC modules is plural, and the plural AC/DC modules are connected in parallel with each other.
6. Power supply system according to claim 4 or 5, characterized in that the AC/DC module is a unidirectional AC/DC module or a bidirectional AC/DC module.
7. The power supply system of claim 1, further comprising a monitoring component for monitoring a status of at least one of the ac cabinet, the rectifier cabinet, and the dc cabinet.
8. The power supply system of claim 7, wherein the monitoring assembly comprises three monitoring modules, and the three monitoring modules respectively monitor the operating states of the AC cabinet, the rectifier cabinet and the DC cabinet.
9. The power supply system of claim 1, wherein an energy storage device is disposed within the dc cabinet.
10. The power supply system of claim 9, wherein the energy storage device comprises:
the energy storage battery is electrically connected with the direct current bus;
and the battery control box is electrically connected with the energy storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222024635.8U CN218449527U (en) | 2022-08-02 | 2022-08-02 | Power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222024635.8U CN218449527U (en) | 2022-08-02 | 2022-08-02 | Power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218449527U true CN218449527U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222024635.8U Active CN218449527U (en) | 2022-08-02 | 2022-08-02 | Power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218449527U (en) |
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2022
- 2022-08-02 CN CN202222024635.8U patent/CN218449527U/en active Active
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