CN114759571A - Voltage regulating method, device, equipment and storage medium of wind power and energy storage combined system - Google Patents

Abstract

The application discloses a voltage regulating method, device, equipment and storage medium of a wind power energy storage combined system, which make up for power shortage by adding an energy storage unit, so that a grid-connected bus output power curve is stable, stable grid-connected operation of a wind power unit is facilitated, and dependence on rotating reserve capacity is reduced. Specifically, whether the wind turbine generator is in a power shortage state or not is determined by acquiring reactive power data output by the wind turbine generator; and when the wind turbine generator is in a power shortage state, determining the reactive power data to be compensated of the wind turbine generator according to the reactive power data, controlling the energy storage group to perform reactive compensation on the wind turbine generator, and adjusting the voltage of the wind turbine energy storage combined system, so that the reactive compensation of the energy storage group on the wind turbine generator is realized, and the stability of grid-connected operation of the wind turbine generator is ensured.

Description

Voltage regulation method, device, equipment and storage medium of wind power energy storage combined system

technical field

The present application relates to the technical field of power grid energy storage optimization, and in particular, to a voltage regulation method, device, equipment and storage medium for a combined wind power energy storage system.

Background technique

With the rapid development of offshore wind power, the proportion of wind power in the power supply is increasing. In view of the randomness and fluctuation of the output of wind power generation, the complexity of power balance and stability control of the power grid is increased to a certain extent, resulting in a decrease in the reliability of the power grid system.

At present, when the power grid is disturbed and the voltage is unstable, power shortages are likely to occur, and if the power shortages are too large, the wind power cannot be connected to the grid. Even if it is connected to the grid, it will cause the wind power system to abandon part of the wind power or require a large amount of thermal power rotating reserve capacity to make up for the lack of power. And at this time, if the serious shortage of wind turbines continues to perform active power output and undertake reactive power compensation at the same time, the wind power system may collapse.

SUMMARY OF THE INVENTION

The present application provides a voltage regulation method, device, equipment and storage medium for a combined wind power and energy storage system, to solve the technical problem that the current wind power grid connection is prone to power shortage, which leads to voltage instability and system collapse.

In order to solve the above technical problems, in the first aspect, the present application provides a voltage regulation method for a combined wind power and energy storage system. The combined wind power and energy storage system includes a wind turbine and several energy storage groups, and the voltage regulation method includes:

Obtain the reactive power data output by the wind turbine;

According to the reactive power data, determine whether the wind turbine is in a power shortage state;

If the wind turbine is in a power shortage state, determine the reactive power data to be compensated for the wind turbine according to the reactive power data;

Based on the reactive power data to be compensated, the energy storage group is controlled to perform reactive power compensation on the wind turbine, so as to regulate the voltage of the combined wind power and energy storage system.

In the present application, by adding an energy storage group to make up for the power shortage, the output power curve of the grid-connected busbar is stable, which is more conducive to the stable grid-connected operation of the wind turbine, and at the same time reduces the dependence on the rotating reserve capacity. Specifically, by acquiring the reactive power data output by the wind turbine to determine whether the wind turbine is in a power deficit state; and when the wind turbine is in a power deficit state, determine the reactive power data to be compensated for the wind turbine according to the reactive power data, and The energy storage group is controlled to perform reactive power compensation on the wind turbine, so as to regulate the voltage of the wind power energy storage combined system, so as to realize the reactive power compensation of the energy storage group to the wind turbine and ensure the stability of the grid-connected operation of the wind turbine.

Preferably, the reactive power data output by the wind turbine is obtained, including:

When the wind turbine is in power shortage, the current data of the grid-side converter in the q-axis direction is obtained, and the grid-side converter is used to connect the wind turbine and the grid, so as to flow the output power of the wind turbine into the grid;

Based on the current data, the reactive power data output by the wind turbine is determined.

Preferably, according to the reactive power data, it is determined whether the wind turbine is in a power shortage state, including:

Compare the reactive power data with the preset planned power generation curve;

If the reactive power data is less than the power data of the preset planned power generation power curve, it is determined that the wind turbine is in a power shortage state.

Preferably, if the wind turbine is in a power shortage state, the reactive power data to be compensated for the wind turbine is determined according to the reactive power data, including:

If the wind turbine is in a power shortage state, calculate the difference between the planned output power of the grid bus and the reactive power data;

The difference is determined as the reactive power data to be compensated for the wind turbine.

Preferably, based on the reactive power data to be compensated, the energy storage group is controlled to perform reactive power compensation on the wind turbine, so as to regulate the voltage of the combined wind power and energy storage system, including:

Filtering the reactive power data to be compensated to remove high frequency components in the reactive power data to be compensated to obtain the input value of the compensated power;

If the input value of the compensation power is greater than the maximum output value of the energy storage group, the energy storage group is controlled to perform reactive power compensation on the wind turbine with the maximum output value.

Preferably, the maximum output value is calculated based on a preset parameter, and the preset parameter is a preset power factor or the reactive power adjusted by the voltage of the common connection point of the combined wind power and energy storage system.

Preferably, the energy storage group includes a bidirectional inverter and a battery, and the bidirectional inverter is used to control the active power and reactive power output by the battery.

In a third aspect, the application provides a voltage regulating device for a combined wind power energy storage system, the combined wind power energy storage system includes a wind turbine and several energy storage groups, and the voltage regulating device includes:

The acquisition module is used to acquire the reactive power data output by the wind turbine;

a first determining module, configured to determine whether the wind turbine is in a power shortage state according to reactive power data;

The second determining module is used for determining the reactive power data to be compensated for the wind turbine according to the reactive power data if the wind turbine is in a power shortage state;

The control module is used to control the energy storage group to perform reactive power compensation on the wind turbine based on the reactive power data to be compensated, so as to regulate the voltage of the wind power energy storage combined system.

In a third aspect, the present application provides a computer device including a processor and a memory, where the memory is used to store a computer program, and when the computer program is executed by the processor, the voltage regulation method of the combined wind power and energy storage system according to the first aspect is implemented.

In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, implements the voltage regulation method of the combined wind power and energy storage system according to the first aspect.

It should be noted that, for the beneficial effects of the second aspect to the fourth aspect, please refer to the relevant description of the first aspect, which will not be repeated here.

Description of drawings

1 is a schematic flowchart of a voltage regulation method for a combined wind power and energy storage system according to an embodiment of the application;

FIG. 2 is a schematic structural diagram of a combined wind power energy storage system according to an embodiment of the application;

3 is a schematic structural diagram of a voltage regulating device of a combined wind power energy storage system according to an embodiment of the application;

FIG. 4 is a schematic structural diagram of a computer device according to an embodiment of the application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

As recorded in the related art, when the power grid is disturbed and the voltage is unstable, a power shortage is likely to occur, and if the power shortage is too large, the wind power cannot be connected to the grid. Even if it is connected to the grid, it will cause the wind power system to abandon part of the wind power or require a large amount of thermal power rotating reserve capacity to make up for the lack of power. And at this time, if the serious shortage of wind turbines continues to perform active power output and undertake reactive power compensation at the same time, the wind power system may collapse.

To this end, the embodiments of the present application provide a voltage regulation method for a combined wind power and energy storage system. By adding energy storage groups to make up for the power shortage, the output power curve of the grid-connected busbar is stable, which is more conducive to the stable grid-connected operation of the wind turbines. At the same time reduce reliance on spinning reserve capacity. Specifically, it is determined whether the wind turbine is in a power shortage state by acquiring the reactive power data output by the wind turbine; and when the wind turbine is in a power shortage state, the wind power is determined according to the reactive power data. The reactive power data of the unit to be compensated, and controlling the energy storage group to perform reactive power compensation on the wind turbine to regulate the voltage of the wind power energy storage combined system, so as to realize the reactive power of the energy storage group to the wind turbine. Compensation to ensure the stability of grid-connected operation of wind turbines.

Please refer to FIG. 1 , which is a schematic flowchart of a voltage regulation method for a combined wind power and energy storage system according to an embodiment of the present application. The voltage regulation method of the wind power energy storage combined system in the embodiment of the present application can be applied to computer equipment, the computer equipment includes but is not limited to centralized controllers, smart phones, notebook computers, tablet computers, desktop computers, physical servers, and cloud servers and other equipment. The combined wind power and energy storage system includes wind turbines, several energy storage groups and computer equipment.

As an example and not a limitation, FIG. 2 shows a schematic structural diagram of a combined wind power and energy storage system provided by an embodiment of the present application. As shown in Figure 2, the system also includes a dispatch center, a centralized controller, an execution station and an energy storage controller. Optionally, the dispatch center is connected to the centralized controller, the centralized controller is connected to the wind turbine through the execution station, and the centralized controller is connected to the energy storage through the energy storage controller. The energy storage group is set on the grid connection point (ie the access point) of the wind turbine.

The method is described below in conjunction with the combined wind power and energy storage system. As shown in FIG. 1 , the voltage regulation method of the combined wind power and energy storage system in this embodiment includes steps S101 to S104, which are described in detail as follows:

Step S101, acquiring reactive power data output by the wind turbine.

In this step, the centralized controller receives the identification command issued by the dispatch center, and sends the identification command to the energy storage group through the energy storage controller; and receives the reactive power command issued by the dispatch center, and passes the reactive power command through the energy storage controller. The execution station sends it to the wind turbine and tracks it; the execution station feeds back the reactive power data output by the wind turbine to the centralized controller, which is then uploaded to the dispatch center for real-time display.

Step S102, according to the reactive power data, determine whether the wind turbine is in a power shortage state.

In this step, the centralized controller compares the reactive power data fed back by the execution station with the planned generating power, and when the reactive power data is less than the planned generating power, it is determined that the wind turbine is in a power shortage state.

Step S103, if the wind turbine is in a power shortage state, determine the reactive power data to be compensated for the wind turbine according to the reactive power data.

In this step, the centralized controller is also used to send the reactive power command to the energy storage group through the energy storage controller;

The energy storage controller is used to receive the state data of the energy storage group, and upload it to the dispatch center through the centralized controller; the dispatch center is used to obtain the reactive power compensation amount that needs to be compensated for the wind turbine according to the reactive power output by the wind turbine.

Step S104 , based on the reactive power data to be compensated, control the energy storage group to perform reactive power compensation on the wind turbine, so as to regulate the voltage of the combined wind power storage system.

In this step, the reactive power data to be compensated is combined with the state data of the energy storage group itself, so that several energy storage groups perform reactive power compensation on the wind turbine. Optionally, the energy storage group includes a bidirectional inverter and a battery, and the bidirectional inverter is used to control the active power and reactive power output by the battery.

It should be noted that the energy storage group of the present application can have different access modes according to different application scenarios, and can be divided into centralized energy storage and distributed energy storage. Among them, the centralized energy storage technology refers to connecting the entire energy storage system with large capacity and easy centralized control and installation to the AC bus as a single energy supply unit to maintain the frequency and voltage stability of the AC bus; distributed energy storage technology is It refers to the distributed arrangement of energy storage systems with relatively small capacity on the DC bus side or the load unit side of micro power sources such as photovoltaics and wind power, together with each micro power source to form an energy supply unit or directly supply power to the load.

Compared with centralized energy storage technology, distributed energy storage technology has the advantages of simple control, wide geographical distribution, flexibility and convenience that centralized energy storage does not have, and can independently control and realize "plug and play" functions. At the same time, the distributed energy storage technology can also respond to the output fluctuation changes of the distributed power supply in the network in time, and quickly realize on-site compensation. In addition, the distributed energy storage technology can also be divided into two system structures depending on the access point. The AC converter is connected to the AC side of the micro-source in parallel to realize the fast and accurate tracking of the reference power on the grid side, and at the same time realize the distributed control and adjustment of the output power of each distributed energy storage unit to meet their respective power requirements, thereby improving the overall Flexibility of power scheduling in distributed energy storage systems.

In an embodiment, on the basis of the embodiment shown in FIG. 1 , the step S101 includes:

When the wind turbine is in a power shortage, the current data of the grid-side converter in the q-axis direction is obtained, and the grid-side converter is used to connect the wind turbine and the grid, so as to flow the output power of the wind turbine into the power grid;

Based on the current data, reactive power data output by the wind turbine is determined.

In this embodiment, the wind turbine is connected to the grid through a full-power grid-side converter, and the grid-side converter receives reactive power commands and controls the active and reactive power of the wind turbine flowing into the grid.

Optionally, under the premise of direct-drive wind power, it can be known from the mathematical model under the synchronous rotating coordinate system that the active power P and reactive power Q that the grid-side converter controls the wind turbine to flow into the grid are:

where: _ud , u _q , _id , and i _q are the voltage and current of the grid-side converter in the d and q axis directions, respectively;

Select the grid-side voltage direction to be consistent with the d-axis direction of the reference coordinate system, u _q =0, then:

It can be seen that the power exchanged between the grid-side converter and the grid is only related to _{id and iq ;}

According to the given power factor and the maximum current i _max of the d-axis converter, the given value of the q-axis current can be obtained. By controlling the current i _q of the grid-side converter in the q-axis direction, the maximum output of the wind farm can be obtained. reactive power.

In one embodiment, on the basis of the embodiment shown in FIG. 1 , the step S102 includes:

comparing the reactive power data with the preset planned power generation power curve;

If the reactive power data is less than the power data of the preset planned power generation power curve, it is determined that the wind turbine is in a power shortage state.

In this embodiment, reactive power is output according to the planned power generation power curve issued by the dispatch center, and the planned power generation power curve is based on the prediction of wind speed and wind power. When the prediction is inaccurate, the actual power generation curve and the planned power generation curve A power gap is created between the generated power curves.

In one embodiment, on the basis of the embodiment shown in FIG. 1 , the step S103 includes:

If the wind turbine is in a power shortage state, calculating the difference between the planned output power of the grid bus and the reactive power data;

The difference is determined as the reactive power data to be compensated for the wind turbine.

In this embodiment, the essence of the coordinated control problem of the wind turbine and the energy storage group is to calculate the power shortage of the bus, and its expression is as follows:

P ₁ =ΔP=P _d −P _w ;

In the formula, P ₁ is the output power of the energy storage group, P _d is the planned output power of the busbar; P _w is the actual output power of the wind turbine, and ΔP is the reactive power data to be compensated.

In one embodiment, on the basis of the embodiment shown in FIG. 1 , the step S104 includes:

Filtering the reactive power data to be compensated to remove high frequency components in the reactive power data to be compensated to obtain a compensated power input value;

If the compensation power input value is greater than the maximum output value of the energy storage group, the energy storage group is controlled to perform reactive power compensation on the wind turbine with the maximum output value.

In this embodiment, considering the response speed of the energy storage group and its capacity limitation, the high-frequency components are filtered out from the curve of the power deficit ΔP actually input to the energy storage group. When the input value exceeds the maximum output capacity of the energy storage group , the energy storage group outputs according to the maximum value.

Optionally, the maximum output value is calculated based on a preset parameter, and the preset parameter is a preset power factor or the reactive power adjusted by the voltage of the common connection point of the combined wind power and energy storage system.

It should be noted that this application makes up for this power shortage by adding energy storage groups to stabilize the output power curve of the grid-connected busbar, which is not only conducive to the stable grid-connected operation of offshore wind turbines, but also reduces the reliance on rotating backup, and its environment and economic benefits are very obvious. In addition, there are several energy storage groups in the present invention. When the reactive power output by some energy storage groups can meet the requirement of making up for the power shortage, the remaining energy storage groups do not work, thereby effectively reducing the energy storage group. The number of times of operation prolongs the service life of the energy storage group.

In order to implement the voltage regulation method of the combined wind power and energy storage system corresponding to the above method embodiments, to achieve corresponding functions and technical effects. Referring to FIG. 3 , FIG. 3 shows a structural block diagram of a voltage regulating device of a combined wind power and energy storage system provided by an embodiment of the present application. For the convenience of description, only the parts related to this embodiment are shown. The voltage regulating device of the combined wind power and energy storage system provided by the embodiment of this application includes:

an acquisition module 301, configured to acquire reactive power data output by the wind turbine;

a first determining module 302, configured to determine whether the wind turbine is in a power shortage state according to the reactive power data;

A second determining module 303, configured to determine reactive power data to be compensated for the wind turbine according to the reactive power data if the wind turbine is in a power shortage state;

The control module 304 is configured to control the energy storage group to perform reactive power compensation on the wind turbine group based on the reactive power data to be compensated, so as to regulate the voltage of the combined wind power energy storage system.

In one embodiment, the obtaining module 301 is specifically used for:

When the wind turbine is in a power shortage, the current data of the grid-side converter in the q-axis direction is obtained, and the grid-side converter is used to connect the wind turbine and the grid, so as to flow the output power of the wind turbine into the power grid;

Based on the current data, reactive power data output by the wind turbine is determined.

In one embodiment, the first determining module 302 is specifically configured to:

comparing the reactive power data with the preset planned power generation power curve;

If the reactive power data is less than the power data of the preset planned power generation power curve, it is determined that the wind turbine is in a power shortage state.

In one embodiment, the second determining module 303 is specifically configured to:

If the wind turbine is in a power shortage state, calculating the difference between the planned output power of the grid bus and the reactive power data;

The difference is determined as the reactive power data to be compensated for the wind turbine.

In one embodiment, the control module 304 is specifically configured to:

Filtering the reactive power data to be compensated to remove high frequency components in the reactive power data to be compensated to obtain a compensated power input value;

If the compensation power input value is greater than the maximum output value of the energy storage group, the energy storage group is controlled to perform reactive power compensation on the wind turbine with the maximum output value.

Optionally, the maximum output value is calculated based on a preset parameter, and the preset parameter is a preset power factor or the reactive power adjusted by the voltage of the common connection point of the combined wind power and energy storage system.

In one embodiment, the energy storage group includes a bidirectional converter and a battery, and the bidirectional converter is used to control the active power and reactive power output by the battery.

The above-mentioned voltage regulation device of the wind power energy storage combined system can implement the voltage regulation method of the wind power energy storage combined system of the above method embodiments. The options in the foregoing method embodiment are also applicable to this embodiment, and are not described in detail here. For the remaining contents of the embodiments of the present application, reference may be made to the contents of the foregoing method embodiments, which will not be repeated in this embodiment.

FIG. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application. As shown in FIG. 4 , the computer device 4 of this embodiment includes: at least one processor 40 (only one is shown in FIG. 4 ), a memory 41 , and a memory 41 that is stored in the memory 41 and can be processed in the at least one A computer program 42 running on the processor 40, the processor 40 implements the steps in any of the above method embodiments when the computer program 42 is executed.

The computer device 4 may be a smart phone, a tablet computer, a desktop computer, a cloud server and other computing devices. The computer equipment may include, but is not limited to, the processor 40 and the memory 41 . Those skilled in the art can understand that FIG. 4 is only an example of the computer device 4, and does not constitute a limitation on the computer device 4. It may include more or less components than the one shown, or combine some components, or different components , for example, may also include input and output devices, network access devices, and the like.

The so-called processor 40 may be a central processing unit (Central Processing Unit, CPU), and the processor 40 may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuits) , ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 41 may be an internal storage unit of the computer device 4 in some embodiments, such as a hard disk or a memory of the computer device 4 . In other embodiments, the memory 41 may also be an external storage device of the computer device 4, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, flash memory card (Flash Card) and so on. Further, the memory 41 may also include both an internal storage unit of the computer device 4 and an external storage device. The memory 41 is used to store an operating system, an application program, a boot loader (Boot Loader), data, and other programs, such as program codes of the computer program. The memory 41 can also be used to temporarily store data that has been output or will be output.

In addition, an embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the steps in any of the foregoing method embodiments.

The embodiments of the present application provide a computer program product, which, when the computer program product is executed on a computer device, enables the computer device to implement the steps in each of the foregoing method embodiments.

In the several embodiments provided in this application, it should be understood that each block in the flowchart or block diagram may represent a module, program segment or part of code, and the module, program segment or part of code includes One or more executable instructions for implementing specified logical functions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.

If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device to perform all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above are only specific embodiments of the present application, and are not intended to limit the protection scope of the present application. . It is particularly pointed out that for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included within the protection scope of the present application.

Claims (10)

1. a voltage regulation method of a wind power energy storage combined system, is characterized in that, the wind power energy storage combined system comprises a wind turbine and several energy storage groups, and the voltage regulation method comprises: acquiring reactive power data output by the wind turbine; According to the reactive power data, determine whether the wind turbine is in a power shortage state; If the wind turbine is in a power shortage state, determining the reactive power data to be compensated for the wind turbine according to the reactive power data; Based on the reactive power data to be compensated, the energy storage group is controlled to perform reactive power compensation on the wind power generator group, so as to regulate the voltage of the combined wind power and energy storage system. 2 . The voltage regulation method for a combined wind power and energy storage system according to claim 1 , wherein the acquiring reactive power data output by the wind turbine comprises: 2 . When the wind turbine is in a power shortage, the current data of the grid-side converter in the q-axis direction is obtained, and the grid-side converter is used to connect the wind turbine and the grid, so as to flow the output power of the wind turbine into the power grid; Based on the current data, reactive power data output by the wind turbine is determined. 3 . The voltage regulation method for a combined wind power and energy storage system according to claim 1 , wherein the determining, according to the reactive power data, whether the wind turbine is in a power shortage state, comprising: 3 . comparing the reactive power data with the preset planned power generation power curve; If the reactive power data is less than the power data of the preset planned power generation power curve, it is determined that the wind turbine is in a power shortage state. 4 . The voltage regulation method for a combined wind power and energy storage system according to claim 1 , wherein, if the wind turbine is in a power shortage state, the voltage of the wind turbine is determined according to the reactive power data. 5 . Reactive power data to be compensated, including: If the wind turbine is in a power shortage state, calculating the difference between the planned output power of the grid bus and the reactive power data; The difference is determined as the reactive power data to be compensated for the wind turbine. 5 . The voltage regulation method for a combined wind power and energy storage system according to claim 1 , wherein the energy storage group is controlled to perform reactive power compensation on the wind turbine based on the reactive power data to be compensated. 6 . , to regulate the voltage of the combined wind power and energy storage system, including: Filtering the reactive power data to be compensated to remove high frequency components in the reactive power data to be compensated to obtain a compensated power input value; If the compensation power input value is greater than the maximum output value of the energy storage group, the energy storage group is controlled to perform reactive power compensation on the wind turbine with the maximum output value. 6 . The voltage regulation method for a combined wind power storage system according to claim 5 , wherein the maximum output value is calculated based on a preset parameter, and the preset parameter is a preset power factor or the wind power storage. 7 . The reactive power that can be regulated by the voltage at the common connection point of the system. 7 . The voltage regulation method of a combined wind power energy storage system according to claim 1 , wherein the energy storage group comprises a bidirectional inverter and a battery, and the bidirectional inverter is used to control the output voltage of the battery. 8 . Active and reactive power. 8. A voltage regulating device for a combined wind power energy storage system, characterized in that the combined wind power energy storage system comprises a wind turbine and several energy storage groups, and the voltage regulating device comprises: an acquisition module for acquiring reactive power data output by the wind turbine; a first determining module, configured to determine whether the wind turbine is in a power shortage state according to the reactive power data; a second determining module, configured to determine the reactive power data to be compensated for the wind turbine according to the reactive power data if the wind turbine is in a power shortage state; The control module is configured to control the energy storage group to perform reactive power compensation on the wind turbine group based on the reactive power data to be compensated, so as to regulate the voltage of the combined wind power energy storage system. 9. A computer device, characterized in that it comprises a processor and a memory, wherein the memory is used to store a computer program, the computer program being executed by the processor to implement the method according to any one of claims 1 to 7 Voltage regulation method of wind power storage combined system. 10. A computer-readable storage medium, characterized in that it stores a computer program, and when the computer program is executed by a processor, the voltage regulation of the combined wind power energy storage system according to any one of claims 1 to 7 is realized method.

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