CN113612272A - Charging control method and device for uninterruptible power supply of new energy power generation system - Google Patents
Charging control method and device for uninterruptible power supply of new energy power generation system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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Abstract
The invention is suitable for the technical field of uninterruptible power supplies, and provides a charging control method and a charging control device of an uninterruptible power supply for a new energy power generation system. The method comprises the following steps: acquiring the maximum allowable power and input power of an uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment; determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power and the energy storage device parameters at the current moment; and adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameters of the energy storage device at the next moment. According to the invention, the generated power utilization rate of the new energy power generation system can be improved by adjusting the charging parameters in real time.
Description
Technical Field
The invention belongs to the technical field of uninterruptible power supplies, and particularly relates to a charging control method and device of an uninterruptible power supply for a new energy power generation system.
Background
At present, new energy Power generation is an important source of electric energy in China, and in order to improve the Power supply quality of a new energy Power generation System, the new energy Power generation System is usually used in cooperation with a UPS (Uninterruptible Power System). The energy storage device in the UPS system can store part of input electric energy when the electric energy is sufficient to be used as an emergency and improve the quality of power supply.
However, since the power generation amount of the new energy power generation system is unstable, the power entering the UPS system may also change in real time, for example, in a wind power system, the generated power is affected by wind power, the wind power for power generation is unstable, and the energy generated by wind power generation also changes. How to store as much electric energy as possible while ensuring the normal operation of the load so as to improve the utilization rate of the electric energy generated by the new energy source is still a current problem.
Disclosure of Invention
In view of this, the present invention provides a charging control method and apparatus for an uninterruptible power supply of a new energy power generation system, so as to solve the problem that it is difficult to improve the utilization rate of the new energy power generation energy.
The first aspect of the embodiments of the present invention provides a charging control method for an uninterruptible power supply of a new energy power generation system, including:
acquiring the maximum allowable power and input power of the uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system;
subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment;
determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power and the energy storage device parameters at the current moment;
and adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameters of the energy storage device at the next moment.
A second aspect of an embodiment of the present invention provides a charging control device for an uninterruptible power supply of a new energy power generation system, including:
the acquisition module is used for acquiring the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system;
the power calculation module is used for subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment;
the adjustment quantity calculation module is used for determining the charging parameter adjustment quantity of the energy storage device at the current moment based on the surplus power and the energy storage device parameters at the current moment;
and the parameter determining module is used for adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameters of the energy storage device at the next moment.
A third aspect of the embodiments of the present invention provides an uninterruptible power supply, where the uninterruptible power supply is configured to implement the steps of the charging control method for an uninterruptible power supply of the new energy power generation system.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the steps of the charging control method for an uninterruptible power supply of a new energy power generation system as described above.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a charging control method of an uninterruptible power supply for a new energy power generation system, which comprises the following steps: acquiring the maximum allowable power and input power of an uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system; subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment; determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power and the energy storage device parameters at the current moment; and adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameters of the energy storage device at the next moment. According to the invention, the surplus electric quantity which is not charged into the energy storage device of the uninterruptible power supply at the current moment can be accurately obtained by carrying out real-time quantitative calculation on the generated power of the new energy power generation system and the power consumption of the uninterruptible power supply, so that the charging parameter at the next moment is changed, and the power generation utilization rate of the new energy power generation system is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a flowchart illustrating an implementation of a charging control method for an uninterruptible power supply of a new energy power generation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an ups according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a charging control device of an uninterruptible power supply for a new energy power generation system according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, it shows an implementation flowchart of a charging control method for an uninterruptible power supply of a new energy power generation system provided in an embodiment of the present invention, which is detailed as follows:
Referring to fig. 2, in this embodiment, the front end of the uninterruptible power supply is connected to the new energy power generation system, and is configured to obtain electric energy generated by the new energy power generation system; the rear end is connected with the load and used for outputting part of the electric energy acquired by the UPS to the load; the UPS also includes an energy storage device, such as a battery, within the UPS to store a portion of the power drawn by the UPS and to output the stored power when necessary.
The maximum allowable power of the uninterruptible power supply at the current moment represents the maximum power that the uninterruptible power supply can obtain from the new energy power generation system, that is, the active modulation value of the new energy power generation system at the current moment. The maximum allowable power depends on the current carrying capacity of the devices in the ups. The input power of the uninterruptible power supply at the current moment represents the power of the uninterruptible power supply actually obtained from the new energy power generation system at the current moment, and is also equal to the sum of the power output to the load at the current moment and the power stored by the energy storage device.
The new energy power generation system in this embodiment may be a wind power system. Correspondingly, the front end of the uninterruptible power supply is connected with the wind power system and used for acquiring electric energy generated by the wind power system. In the power generation process of the wind power system, the power input into the uninterruptible power supply is equal to the sum of the load power and the charging power. If the power input into the uninterruptible power supply is lower than the power required by the load, inversion output protection can be caused; if the power input into the uninterruptible power supply is higher than the power required by the load, redundant electric energy needs to be stored in the energy storage device in the uninterruptible power supply, and the charging power is calculated at the moment, so that the charging mode which enables the electric energy utilization rate to be maximum can be determined, and the normal work of the load is ensured.
And 102, subtracting the input power at the current time from the maximum allowable power at the current time to obtain the surplus power at the current time.
In this embodiment, the surplus power obtained by subtracting the input power at the current time from the maximum allowable power at the current time represents the power that can be obtained by the UPS and can be used for charging the energy storage device. The surplus power is stored in the energy storage device, so that the utilization rate of electric energy can be improved. If the surplus power at the current moment is not greater than 0, the situation that the new energy power generation system does not have surplus electric energy except for the UPS load and the energy storage device at the current moment and then supplies the surplus electric energy to the energy storage device for storage is represented.
And 103, determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power and the energy storage device parameters at the current moment.
In this embodiment, the energy storage device parameters are used to reflect the charging attribute of the energy storage device, and the energy storage device parameters may include the charging efficiency, the maximum withstand current, the maximum withstand voltage, and the like of the energy storage device; the charging parameters are used to represent the state of charge and the rate of charge of the energy storage device. In order to store surplus power in the energy storage device as much, fast and safely as possible, the charging parameter adjustment amount of the energy storage device at the current time needs to be determined based on the surplus power and the energy storage device parameters at the current time.
And 104, adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameters of the energy storage device at the next moment.
In this embodiment, since the generated energy of the new energy power generation system may be different at each time, in order to ensure the electric energy utilization rate at each time, the charging parameter adjustment amount at each time needs to be calculated in real time, and the charging parameter of the energy storage device needs to be adjusted in real time. And if the adjustment quantity of the charging parameter at the current moment is not more than 0, not adjusting at the next moment.
Optionally, the charging parameter includes charging power; the energy storage device parameter includes a charging efficiency.
Determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on the surplus power and the energy storage device parameter at the current moment comprises the following steps:
calculating the charging power adjustment amount of the energy storage device at the current moment based on the surplus power, the charging efficiency and a first adjustment amount calculation formula at the current moment, wherein the first adjustment amount calculation formula is as follows:
Charge_Cur_Add1＝Pη
the Charge _ Cur _ Add1 represents a charging power adjustment amount of the energy storage device at the current moment, P represents surplus power at the current moment, and η represents charging efficiency.
In this embodiment, the charging efficiency represents the conversion efficiency of the energy storage device to the charging electric energy, the surplus power is multiplied by the charging efficiency, and the obtained result represents the surplus power actually stored in the energy storage device at the current time, that is, the charging power adjustment amount of the energy storage device.
Optionally, the charging parameter includes a charging current; the energy storage device parameter comprises a charging efficiency;
determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on the surplus power and the energy storage device parameter at the current moment comprises the following steps:
acquiring the charging voltage of the energy storage device at the current moment;
calculating the charging current adjustment amount based on a second adjustment amount calculation formula, wherein the second adjustment amount calculation formula is as follows:
the Charge _ Cur _ Add2 represents a charging current adjustment amount, P represents surplus power at the current moment, η represents charging efficiency, and U _ Bat represents a charging voltage of the energy storage device at the current moment.
In this embodiment, after determining the charging power adjustment amount of the energy storage device, the charging current adjustment amount of the energy storage device may be further determined. Specifically, the charging current adjustment amount of the energy storage device at the charging voltage at the current moment is calculated based on the charging power adjustment amount of the energy storage device and the charging voltage of the energy storage device at the current moment. Then, under the condition that the charging voltage is not changed, the charging current is adjusted, and the adjustment of the corresponding charging power can be realized.
Optionally, the step 101 includes:
acquiring three-phase input voltage of the uninterruptible power supply at the current moment;
extracting active components of three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active input voltage of the uninterruptible power supply at the current moment;
calculating the maximum allowable power of the uninterruptible power supply at the current moment based on the active input voltage of the uninterruptible power supply at the current moment and a first power calculation formula, wherein the first power calculation formula is as follows:
wherein, Input _ Power _ Max represents the maximum allowable Power of the uninterruptible Power supply at the current moment, U1Indicating the active input voltage, I, of the ups at the present moment1Representing the maximum allowable current of the ups.
In this embodiment, the maximum allowable power of the ups at the present moment is the maximum allowable active power, and the maximum allowable power is determined based on the active input voltage of the ups at the present moment and the maximum allowable current of the ups. The maximum allowable current of the ups is related to the internal components of the ups.
Optionally, obtaining the input power of the ups at the current time includes:
acquiring three-phase input current and three-phase input voltage of the uninterruptible power supply at the current moment;
respectively extracting active components of three-phase input current and active components of three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active components of the input current and the active components of the input voltage of the uninterruptible power supply at the current moment;
calculating the input power of the uninterruptible power supply at the current moment based on the input current active component, the input voltage active component and a second power calculation formula of the uninterruptible power supply at the current moment, wherein the second power calculation formula is as follows:
wherein, Input _ Power _ Curr represents the Input Power of the ups at the current time, U2Representing the input voltage active component, I2Representing the input current real component.
In this embodiment, the input power of the uninterruptible power supply at the present moment is active power, and the input power is specifically determined based on the input active voltage and the input active current. Extracting the real components of the three-phase input current and the three-phase input voltage may comprise the steps of:
sequentially carrying out clark conversion and park conversion on the three-phase input current to obtain an input current active component IdAnd input current reactive component Iq；
Sequentially carrying out clark conversion and park conversion on the three-phase input voltage to obtain an input voltage active component UdAnd input voltage reactive component Uq。
Optionally, before determining the adjustment amount of the charging parameter of the energy storage device at the current time based on the surplus power at the current time and the energy storage device parameter of the uninterruptible power supply, the method further includes:
and subtracting the surplus power of the current moment by the margin of ensuring the load operation to obtain the surplus power of ensuring the load operation at the current moment.
Correspondingly, determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on the surplus power and the energy storage device parameter at the current moment comprises the following steps:
and determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power for guaranteeing the load operation at the current moment and the energy storage device parameters.
In this embodiment, a margin for ensuring the operation of the load is further provided to ensure that the UPS can normally supply power to the load after the charging parameter of the energy storage device is adjusted. The value of the margin for ensuring the load operation needs to be determined according to actual conditions. Accordingly, it is necessary to determine the charge parameter adjustment amount based on the surplus power after subtracting the margin for ensuring the load operation.
As can be seen from the above, the charging control method for an uninterruptible power supply of a new energy power generation system according to the present invention includes: acquiring the maximum allowable power and input power of an uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system; subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment; determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power and the energy storage device parameters at the current moment; and adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameters of the energy storage device at the next moment. According to the invention, the surplus electric quantity which is not charged into the energy storage device of the uninterruptible power supply at the current moment can be accurately obtained by carrying out real-time quantitative calculation on the generated power of the new energy power generation system and the power consumption of the uninterruptible power supply, so that the charging parameter at the next moment is changed, and the power generation utilization rate of the new energy power generation system is improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The following are embodiments of the apparatus of the invention, reference being made to the corresponding method embodiments described above for details which are not described in detail therein.
Fig. 3 is a schematic structural diagram of a charging control device for an uninterruptible power supply of a new energy power generation system according to an embodiment of the present invention, and for convenience of description, only portions related to the embodiment of the present invention are shown, and detailed descriptions are as follows:
as shown in fig. 3, the charge control device 3 for an uninterruptible power supply of a new energy power generation system includes:
the obtaining module 31 is configured to obtain a maximum allowable power and an input power of the uninterruptible power supply at a current time, and a charging parameter of an energy storage device in the uninterruptible power supply at the current time; the input power is the power of the uninterruptible power supply input by the new energy power generation system;
the power calculation module 32 is configured to subtract the input power at the current time from the maximum allowable power at the current time to obtain surplus power at the current time;
the adjustment quantity calculating module 33 is configured to determine a charging parameter adjustment quantity of the energy storage device at the current time based on the surplus power and the energy storage device parameter at the current time;
and the parameter determining module 34 is configured to adjust the charging parameter of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment, so as to obtain the charging parameter of the energy storage device at the next moment.
Optionally, the charging parameter includes charging power; the energy storage device parameter comprises a charging efficiency;
the adjustment amount calculation module 33 is specifically configured to:
calculating the charging power adjustment amount of the energy storage device at the current moment based on the surplus power, the charging efficiency and a first adjustment amount calculation formula at the current moment, wherein the first adjustment amount calculation formula is as follows:
Charge_Cur_Add1＝Pη
the Charge _ Cur _ Add1 represents a charging power adjustment amount of the energy storage device at the current moment, P represents surplus power at the current moment, and η represents charging efficiency.
Optionally, the charging parameter includes a charging current; the energy storage device parameter comprises a charging efficiency;
the adjustment amount calculation module 33 is specifically configured to:
acquiring the charging voltage of the energy storage device at the current moment;
calculating the adjustment quantity of the charging current based on the surplus power and the charging efficiency at the current moment, the charging voltage of the energy storage device at the current moment and a second adjustment quantity calculation formula, wherein the second adjustment quantity calculation formula is as follows:
the Charge _ Cur _ Add2 represents a charging current adjustment amount, P represents surplus power at the current moment, η represents charging efficiency, and U _ Bat represents a charging voltage of the energy storage device at the current moment.
Optionally, the obtaining module is specifically configured to:
acquiring three-phase input voltage of the uninterruptible power supply at the current moment;
extracting active components of three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active input voltage of the uninterruptible power supply at the current moment;
calculating the maximum allowable power of the uninterruptible power supply at the current moment based on the active input voltage of the uninterruptible power supply at the current moment and a first power calculation formula, wherein the first power calculation formula is as follows:
wherein, Input _ Power _ Max represents the maximum allowable Power of the uninterruptible Power supply at the current moment, U1Indicating the active input voltage, I, of the ups at the present moment1Representing the maximum allowable current of the ups.
Optionally, the obtaining module 31 is specifically configured to:
acquiring three-phase input current and three-phase input voltage of the uninterruptible power supply at the current moment;
respectively extracting active components of three-phase input current and active components of three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active components of the input current and the active components of the input voltage of the uninterruptible power supply at the current moment;
calculating the input power of the uninterruptible power supply at the current moment based on the input current active component, the input voltage active component and a second power calculation formula of the uninterruptible power supply at the current moment, wherein the second power calculation formula is as follows:
wherein, Input _ Power _ Curr represents the Input Power of the ups at the current time, U2Representing the input voltage active component, I2Representing the input current real component.
Optionally, the power calculating module 32 is further configured to:
before determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameters of the uninterruptible power supply, subtracting the surplus power at the current moment by the margin for ensuring the load operation to obtain the surplus power for ensuring the load operation at the current moment;
accordingly, the adjustment amount calculation module 33 is further configured to:
and determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power for guaranteeing the load operation at the current moment and the energy storage device parameters.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A charging control method for an uninterruptible power supply of a new energy power generation system is characterized by comprising the following steps:
acquiring the maximum allowable power and input power of an uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system;
subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment;
determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power and the energy storage device parameters at the current moment;
and adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameters of the energy storage device at the next moment.
2. The charging control method for the uninterruptible power supply of the new energy power generation system according to claim 1, wherein the charging parameter includes a charging power; the energy storage device parameter comprises a charging efficiency;
the determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameter comprises:
calculating the charging power adjustment amount of the energy storage device at the current moment based on the surplus power, the charging efficiency and a first adjustment amount calculation formula at the current moment, wherein the first adjustment amount calculation formula is as follows:
Charge_Cur_Add1＝Pη
the Charge _ Cur _ Add1 represents a charging power adjustment amount of the energy storage device at the current moment, P represents surplus power at the current moment, and η represents the charging efficiency.
3. The charging control method for the uninterruptible power supply of the new energy power generation system according to claim 1, wherein the charging parameter includes a charging current; the energy storage device parameter comprises a charging efficiency;
the determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on the surplus power at the current moment and the energy storage device parameter comprises:
acquiring the charging voltage of the energy storage device at the current moment;
calculating the adjustment amount of the charging current based on the surplus power and the charging efficiency at the current moment, the charging voltage of the energy storage device at the current moment and a second adjustment amount calculation formula, wherein the second adjustment amount calculation formula is as follows:
the Charge _ Cur _ Add2 represents the charging current adjustment amount, P represents surplus power at the current moment, η represents the charging efficiency, and U _ Bat represents the charging voltage of the energy storage device at the current moment.
4. The charging control method for the uninterruptible power supply of the new energy power generation system according to any one of claims 1 to 3, wherein the obtaining of the maximum allowable power of the uninterruptible power supply at the current time includes:
acquiring three-phase input voltage of the uninterruptible power supply at the current moment;
extracting active components of three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active input voltage of the uninterruptible power supply at the current moment;
calculating the maximum allowable power of the uninterruptible power supply at the current moment based on the active input voltage of the uninterruptible power supply at the current moment and a first power calculation formula, wherein the first power calculation formula is as follows:
wherein Input _ Power _ Max represents that the UPS is at the current timeMaximum allowable power of the moment, U1Representing the active input voltage, I, of the ups at the present moment1Representing the maximum allowable current of the ups.
5. The charging control method for the uninterruptible power supply of the new energy power generation system according to any one of claims 1 to 3, wherein obtaining the input power of the uninterruptible power supply at the current time includes:
acquiring three-phase input current and three-phase input voltage of the uninterruptible power supply at the current moment;
respectively extracting active components of three-phase input current and active components of three-phase input voltage of the uninterruptible power supply at the current moment to obtain the active components of the input current and the active components of the input voltage of the uninterruptible power supply at the current moment;
calculating the input power of the uninterruptible power supply at the current moment based on the input current active component, the input voltage active component and a second power calculation formula of the uninterruptible power supply at the current moment, wherein the second power calculation formula is as follows:
wherein Input _ Power _ Curr represents the Input Power of the ups at the current time, U2Representing the input voltage active component, I2Representing the input current real component.
6. The method for controlling charging of an uninterruptible power supply for a new energy power generation system according to any one of claims 1 to 3, wherein before determining the adjustment amount of the charging parameter of the energy storage device at the current time based on the surplus power at the current time and the energy storage device parameter of the uninterruptible power supply, the method further includes:
subtracting the surplus power at the current moment by the margin for guaranteeing the load operation to obtain the surplus power for guaranteeing the load operation at the current moment;
correspondingly, the determining the adjustment amount of the charging parameter of the energy storage device at the current moment based on the surplus power and the energy storage device parameter at the current moment includes:
and determining the charging parameter adjustment amount of the energy storage device at the current moment based on the surplus power for guaranteeing the load operation at the current moment and the energy storage device parameters.
7. A charge control device for an uninterruptible power supply of a new energy power generation system, comprising:
the acquisition module is used for acquiring the maximum allowable power and the input power of the uninterruptible power supply at the current moment and the charging parameters of an energy storage device in the uninterruptible power supply at the current moment; the input power is the power of the uninterruptible power supply input by the new energy power generation system;
the power calculation module is used for subtracting the input power at the current moment from the maximum allowable power at the current moment to obtain surplus power at the current moment;
the adjustment quantity calculation module is used for determining the charging parameter adjustment quantity of the energy storage device at the current moment based on the surplus power and the energy storage device parameters at the current moment;
and the parameter determining module is used for adjusting the charging parameters of the energy storage device at the current moment based on the charging parameter adjustment amount at the current moment to obtain the charging parameters of the energy storage device at the next moment.
8. The charging control apparatus for an uninterruptible power supply of a new energy power generation system according to claim 7, wherein the charging parameter includes a charging power; the energy storage device parameter comprises a charging efficiency;
the adjustment amount calculation module is specifically configured to:
calculating the charging power adjustment amount of the energy storage device at the current moment based on the surplus power, the charging efficiency and a first adjustment amount calculation formula at the current moment, wherein the first adjustment amount calculation formula is as follows:
Charge_Cur_Add1＝Pη
the Charge _ Cur _ Add1 represents a charging power adjustment amount of the energy storage device at the current moment, P represents surplus power at the current moment, and η represents the charging efficiency.
9. An uninterruptible power supply, characterized in that the uninterruptible power supply is used for implementing the steps of the charging control method of the uninterruptible power supply for the new energy power generation system as claimed in any one of claims 1 to 6.
10. A computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to implement the steps of the charging control method for an uninterruptible power supply of a new energy power generation system as claimed in any one of claims 1 to 6.
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| PCT/CN2021/135654 WO2023000581A1 (en) | 2021-07-19 | 2021-12-06 | Charging control method and device for uninterruptible power supply for new energy power generation system |
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| WO2023000581A1 (en) * | 2021-07-19 | 2023-01-26 | 科华数据股份有限公司 | Charging control method and device for uninterruptible power supply for new energy power generation system |
| CN116111714A (en) * | 2023-04-11 | 2023-05-12 | 浙江德塔森特数据技术有限公司 | Uninterruptible power supply, control method and device thereof and readable medium |
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