Control method and system for participation of network construction energy storage type SVG in frequency modulation and voltage regulation of power grid

Abstract

The invention discloses a control method and system for participation of a network construction energy storage type SVG in frequency modulation and voltage regulation of a power grid, and the method comprises the steps: constructing a second-order synchronous phase modifier model in a network construction energy storage type SVG control system, and generating a phase angle delta and an angular frequency omega; obtaining a frequency deviation according to the angular frequency omega and the grid-connected frequency omega ac; generating an internal voltage instruction value by adopting reactive power-voltage droop control according to the deviation between the grid-connected point voltage and the reference voltage; and according to the frequency deviation and the voltage deviation, a reactive-voltage droop coefficient and a virtual admittance parameter are adjusted in real time, a current reference value is generated by using the updated virtual admittance parameter, and finally voltage and frequency adjusting current is output through current decoupling and PWM driving. Under the condition of a weak power grid or a fault, the networking energy storage type SVG can stably generate voltage source characteristics without a phase-locked loop; and the energy storage unit can quickly release or absorb active power to realize efficient inertial support.

Description

Technical Field

[0001] This invention relates to the field of power electronics and power systems, and in particular to a control method and system for grid-connected energy storage SVG to participate in grid frequency and voltage regulation. Background Technology

[0002] With the large-scale grid connection of new energy sources such as wind power and photovoltaics, the power system faces challenges in frequency and voltage stability due to the replacement of traditional synchronous machines by power electronic equipment with them, resulting in a sharp decline in inertia and short-circuit capacity. Grid-connected SVG relies on phase-locked loops to generate current sources to output reactive power, which is prone to loss of synchronization and difficulty in rapid support under weak grid or fault conditions. While some grid-connected SVGs improve weak grid stability by simulating the voltage source characteristics of synchronous machines, and energy storage integration can provide inertia support, existing solutions often fail to meet the dual requirements of voltage and frequency regulation, lack adaptive parameter adjustment mechanisms, and fail to reasonably meet the capacity configuration requirements for transient voltage support and frequency inertia support simultaneously. Summary of the Invention

[0003] The purpose of this invention is to provide a control method and system for grid-connected energy storage SVG to participate in grid frequency and voltage regulation, so as to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, the present invention provides a control method for grid-connected energy storage type SVG to participate in grid frequency and voltage regulation, comprising:

[0006] A second-order synchronous condenser model is constructed within the grid-connected energy storage type SVG control system to generate the phase angle δ and angular frequency ω.

[0007] Based on the angular frequency ω and the grid connection frequency ω ac Or obtain frequency deviation;

[0008] Based on the deviation between the grid connection point voltage and the reference voltage, reactive power-voltage droop control is used to generate internal voltage command values.

[0009] Based on the frequency deviation and voltage deviation, the reactive power-voltage droop coefficient and virtual admittance parameter are adjusted in real time. The updated virtual admittance parameter is used to generate a current reference value, and finally the voltage and frequency regulated current is output through current decoupling and PWM drive.

[0010] Furthermore, the construction of a second-order synchronous condenser model within the grid-connected energy storage SVG control system, generating the phase angle δ and angular frequency ω, includes:

[0011] A second-order mechanical model of a synchronous condenser is simulated, using a virtual rotational inertia time constant T. j Construct the dynamic equation with the virtual damping coefficient D:

[0012]

[0013] The equation is used to generate the phase angle δ and angular frequency ω, where ω0 is the initial angular frequency, Pref is the active power command, and P is the actual output active power on the AC side.

[0014] Furthermore, the method based on the angular frequency ω and the grid connection frequency ω ac Or the frequency deviation may include:

[0015] When there is a frequency deviation Δω=ω between the grid connection point frequency and the internal angular velocity. ac When -ω, the control system automatically adjusts the Pref command to provide active power output through the energy storage unit.

[0016] Furthermore, the step of generating an internal voltage command value using reactive power-voltage droop control based on the deviation between the grid connection point voltage and the reference voltage includes:

[0017] Real-time detection of reactive power Q and reactive power command Qref output by grid-connected energy storage SVG, and measurement of voltage amplitude U at grid connection point. PCC The internal reference voltage amplitude E* is generated according to the droop formula:

[0018] E * =U0-k Q (QQ ref )

[0019] Where k Q The initial value is set to 0.05, and it is automatically corrected through subsequent adaptive adjustments.

[0020] Furthermore, the real-time adjustment of the reactive power-voltage droop coefficient and virtual admittance parameter based on frequency deviation and voltage deviation includes:

[0021] Combined steady-state virtual admittance Calculate the current reference I in dq coordinates * =Y0(E * -U PCC Simultaneously, Δω and ΔU are monitored in real time, and adaptive control is applied: k Q (t+Δt)=k Q (t)+γ Q ΔU,R0(t+Δt)=R0(t+γ R Δω dynamically adjusts the reactive power-voltage droop coefficient k Q With virtual admittance parameter R0.

[0022] Furthermore, the step of generating a current reference value using the updated virtual admittance parameters, and finally outputting a voltage- and frequency-modulated current after current decoupling and PWM drive, includes:

[0023] Will I* Decoupling to I d * I q * After being regulated by a PI controller, the cascaded H-bridge sub-module is controlled by a three-level PWM module to achieve the target current output.

[0024] Furthermore, the energy storage capacity is configured according to the larger value between the transient voltage-supported energy demand W1 and the inertia-supported energy demand W2:

[0025] Transient voltage support requirements:

[0026] Inertia support requirements:

[0027] Ultimately, W≥max{W1,W2} was selected as the configuration standard for the energy storage system.

[0028] Secondly, the present invention provides a control system for grid-connected energy storage type SVG participating in grid frequency and voltage regulation, comprising:

[0029] The model building module is used to build a second-order synchronous condenser model inside the grid-connected energy storage SVG control system and generate the phase angle δ and angular frequency ω.

[0030] The frequency deviation acquisition module is used to determine the frequency deviation based on the angular frequency ω and the grid connection frequency ω. ac Obtain the frequency deviation;

[0031] The voltage deviation acquisition module is used to generate internal voltage command values ​​based on the deviation between the grid connection point voltage and the reference voltage, using reactive power-voltage droop control.

[0032] The output adjustment module is used to adjust the reactive power-voltage droop coefficient and virtual admittance parameters in real time according to the frequency deviation and voltage deviation. The updated virtual admittance parameters are used to generate a current reference value, and finally the voltage and frequency regulated current is output through current decoupling and PWM drive.

[0033] Thirdly, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the control method for grid-connected energy storage type SVG participating in grid frequency and voltage regulation.

[0034] Fourthly, the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the control method for grid-connected energy storage type SVG participating in grid frequency and voltage regulation.

[0035] This invention addresses the problems in the background art and achieves significant technical effects from the following aspects:

[0036] This invention constructs a second-order mechanical dynamic model within the SVG to simulate the rotational inertia and damping characteristics of a real synchronous machine. This allows for a stable output of AC voltage with voltage source characteristics, even under weak grid conditions such as short circuits or low inertia. During sudden changes in grid frequency, the model can rapidly release or absorb active power, providing inertial support and significantly improving frequency stability and fault ride-through capability.

[0037] This invention employs a reactive power and voltage droop control strategy, and introduces an adaptive algorithm to adjust the droop coefficient in real time. The system dynamically increases or decreases reactive power injection or absorption based on the voltage deviation at the grid connection point, achieving high-precision voltage regulation under various operating conditions without the need for manually preset empirical parameters.

[0038] This invention addresses the coordinated regulation of active and reactive power. It suppresses grid disturbances by updating virtual admittance parameters online and generates an accurate current reference by combining decoupled control with an inner-loop mechanism. This structure not only utilizes the filtering characteristics of virtual admittance to smooth grid fluctuations but also achieves adaptive optimization between voltage and frequency regulation, significantly enhancing dynamic response speed and anti-interference capability.

[0039] This invention proposes to use the larger of the energy requirements for voltage support and inertial support as the basis for configuring energy storage capacity. This ensures sufficient reactive power output during voltage drops while meeting the energy requirements for frequency inertial support, achieving an optimal balance between efficiency and reliability and avoiding resource waste or shortage. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a grid-connected energy storage SVG device.

[0041] Figure 2 This is a flowchart of the present invention. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings:

[0043] Example 1, please refer to Figure 2 This invention provides a control method for grid-connected energy storage SVG to participate in grid frequency and voltage regulation, comprising:

[0044] A second-order synchronous condenser model is constructed within the grid-connected energy storage type SVG control system to generate the phase angle δ and angular frequency ω.

[0045] Based on the angular frequency ω and the grid connection frequency ω ac Or obtain frequency deviation;

[0046] Based on the deviation between the grid connection point voltage and the reference voltage, reactive power-voltage droop control is used to generate internal voltage command values.

[0047] Based on the frequency deviation and voltage deviation, the reactive power-voltage droop coefficient and virtual admittance parameter are adjusted in real time. The updated virtual admittance parameter is used to generate a current reference value, and finally the voltage and frequency regulated current is output through current decoupling and PWM drive.

[0048] This method achieves rapid inertial response and voltage support of grid-connected energy storage SVG under weak grid conditions by simulating a second-order model of a synchronous condenser and reactive power-voltage droop control, combined with virtual admittance current reference generation and adaptive parameter adjustment. It also meets the requirements for fault ride-through and dynamic support by reasonably configuring the energy storage capacity.

[0049] Example 2: This invention provides a control method for grid-connected energy storage SVG to participate in grid frequency and voltage regulation, comprising:

[0050] 1. Synchronous speed regulation stage

[0051] A second-order mechanical model of a synchronous condenser is simulated, using a virtual rotational inertia time constant T. j Constructing dynamic equations with virtual damping coefficient D

[0052]

[0053] This equation is used to generate the phase angle δ and angular frequency ω, and adaptively adjusts the active power command P based on the frequency deviation Δω. ref This achieves inertial support.

[0054] 2. Pressure Regulating Sag

[0055] Based on the grid connection point voltage U PCC The deviation ΔU from the reference voltage U0 is controlled by reactive power-voltage droop control E. * =U0-k Q (QQ ref Generate internal reference voltage amplitude E * And the reactive power-voltage droop coefficient k Q It adaptively adjusts based on the voltage deviation amplitude to inject or absorb reactive power when the voltage drops or becomes too high.

[0056] 3. Virtual admittance current reference generation and adaptive adjustment

[0057] Combining steady-state virtual admittance Calculate the current reference I in dq coordinates * =Y0(E * -U PCC Simultaneously, Δω and ΔU are monitored in real time, and adaptive control is applied: k Q (t+Δt)=kQ (t)+γ Q ΔU,R0(t+Δt)=R0(t+γ R Δω dynamically adjusts the reactive power-voltage droop coefficient k Q The virtual admittance parameter R0 is used to optimize voltage and frequency regulation performance and system stability.

[0058] 4. Current decoupling and PWM drive

[0059] Reference current I * Decoupling to I d * I q * The PI inner loop controller and PWM generate trigger pulses for the cascaded H-bridge inverter, achieving precise active / reactive current output.

[0060] 5. Coordinated configuration of energy storage capacity

[0061] The energy storage capacity is configured according to the larger value between the transient voltage support energy demand W1 and the inertia support energy demand W2, so as to ensure that the grid-connected energy storage SVG has sufficient reactive power support when the voltage drops suddenly, and can provide sufficient reactive power when the frequency fluctuates.

[0062] Under weak grid or fault conditions, the present invention enables grid-connected energy storage SVG to stably generate voltage source characteristics without phase-locked loop;

[0063] The energy storage unit can quickly release or absorb active power to achieve efficient inertial support;

[0064] Adaptive adjustment of reactive power-voltage droop coefficient and virtual admittance parameters ensures voltage and frequency regulation performance and system stability.

[0065] 4. Rationally configure energy storage capacity to comprehensively meet the dual requirements of voltage and frequency support.

[0066] Example 3: This invention provides a control method for grid-connected energy storage type SVG to participate in grid frequency and voltage regulation, including:

[0067] 1. Synchronous speed control implementation method:

[0068] A second-order synchronous condenser model is constructed within the grid-connected energy storage SVG control system, and the phase angle δ and angular frequency ω are generated internally.

[0069]

[0070] Where T j The virtual rotational inertia time constant, D, is set based on the system's equivalent inertia and damping parameters.

[0071] When there is a deviation between the grid connection point frequency and the internal angular velocity, Δω=ω ac When -ω, P is automatically adjusted by the control system. ref The command provides active power output through the energy storage unit.

[0072] 2. Implementation method of voltage regulation droop control:

[0073] Real-time detection of reactive power Q and reactive power command Q of grid-connected energy storage SVG output ref And measure the voltage amplitude U at the grid connection point. PCC The internal reference voltage amplitude E is generated according to the droop formula. * :

[0074] E * =U0-k Q (QQ ref )

[0075] Where k Q The initial value is set to 0.05, and can be automatically corrected through subsequent adaptive adjustments.

[0076] 3. Implementation method of virtual admittance current reference generation and adaptive adjustment:

[0077] Based on the internal reference voltage E * With grid connection point voltage U PCC The difference is used to calculate the current reference value I in the dq coordinate system using virtual admittance. * =Y0(E * -U PCC Where R0 = 0.1pu and L0 = 0.2pu are initial values. To adapt to the constantly changing power grid conditions, this implementation adopts adaptive control:

[0078] k Q (t+Δt)=k Q (t)+γ Q ΔU,R0(t+Δt)=R0(t+γ R Δω

[0079] This method can dynamically adjust the voltage and frequency support capabilities of grid-connected energy storage SVG according to actual conditions.

[0080] 4. Current decoupling and PWM control implementation methods:

[0081] Will I * Decoupling to I d * I q *After adjustment by the PI controller, the cascaded H-bridge sub-module is controlled by a three-level PWM module to achieve the target current output. In this embodiment, the current sampling frequency is set to 10kHz, and the PWM frequency is set to 5kHz.

[0082] 5. Energy storage capacity configuration description:

[0083] In this embodiment, the energy storage capacity W of the grid-connected SVG energy storage type is calculated according to the following steps:

[0084] Transient voltage support requirements:

[0085] Inertia support requirements:

[0086] Ultimately, W≥max{W1,W2} was selected as the configuration standard for the energy storage system.

[0087] 6. Control Implementation Considerations:

[0088] In this embodiment, all control quantities are standardized to facilitate their uniform use in grid-connected energy storage SVG devices with different rated voltage levels and capacities.

[0089] Voltage and current measurements are performed using phase-separated sampling combined with a second-order low-pass filter. The sampling frequency is kept consistent with the control frequency, and the filter cutoff frequency is set to 500Hz.

[0090] In summary, this implementation method, through synchronous speed control, reactive power-voltage droop control, adaptive virtual admittance adjustment, and reasonable energy storage capacity configuration, realizes the effective role of grid-connected energy storage SVG in grid voltage and frequency regulation, and has good dynamic response characteristics and adaptability.

[0091] In another embodiment of the present invention, a control system for grid-connected energy storage SVG participating in grid frequency and voltage regulation is provided, which can be used to implement the above-mentioned control method for grid-connected energy storage SVG participating in grid frequency and voltage regulation. Specifically, the system includes:

[0092] The model building module is used to build a second-order synchronous condenser model inside the grid-connected energy storage SVG control system and generate the phase angle δ and angular frequency ω.

[0093] The frequency deviation acquisition module is used to determine the frequency deviation based on the angular frequency ω and the grid connection frequency ω. ac Obtain the frequency deviation;

[0094] The voltage deviation acquisition module is used to generate internal voltage command values ​​based on the deviation between the grid connection point voltage and the reference voltage, using reactive power-voltage droop control.

[0095] The output adjustment module is used to adjust the reactive power-voltage droop coefficient and virtual admittance parameters in real time according to the frequency deviation and voltage deviation. The updated virtual admittance parameters are used to generate a current reference value, and finally the voltage and frequency regulated current is output through current decoupling and PWM drive.

[0096] The module division in this embodiment of the invention is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of the invention can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0097] In another embodiment of the present invention, a computer device is provided, comprising a processor and a memory. The memory stores a computer program, which includes program instructions. The processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions from the computer storage medium to achieve a corresponding method flow or corresponding function. The processor described in this embodiment of the present invention can be used in the operation of a control method for grid-connected energy storage SVG participating in grid frequency and voltage regulation.

[0098] In another embodiment of the present invention, a storage medium is provided, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device used to store programs and data. It is understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and extended storage media supported by the computer device. The computer-readable storage medium provides storage space that stores the terminal's operating system. Furthermore, the storage space also stores one or more instructions suitable for loading and execution by a processor. These instructions can be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk storage device. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the control method for a grid-connected energy storage type SVG participating in grid frequency and voltage regulation in the above embodiments.

[0099] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0100] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0101] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0102] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A control method for grid-connected energy storage type SVG participating in grid frequency and voltage regulation, characterized in that, include: A second-order synchronous condenser model is constructed within the grid-connected energy storage type SVG control system to generate the phase angle δ and angular frequency ω. Based on the angular frequency ω and the grid connection frequency ω ac Or obtain frequency deviation; Based on the deviation between the grid connection point voltage and the reference voltage, reactive power-voltage droop control is used to generate internal voltage command values. Based on the frequency deviation and voltage deviation, the reactive power-voltage droop coefficient and virtual admittance parameter are adjusted in real time. The updated virtual admittance parameter is used to generate a current reference value, and finally the voltage and frequency regulated current is output through current decoupling and PWM drive.

2. The control method for grid-connected energy storage type SVG participating in grid frequency and voltage regulation according to claim 1, characterized in that, The construction of a second-order synchronous condenser model within the grid-connected energy storage SVG control system, generating the phase angle δ and angular frequency ω, includes: A second-order mechanical model of a synchronous condenser is simulated, using a virtual rotational inertia time constant T. j Construct the dynamic equation with the virtual damping coefficient D: The equation is used to generate the phase angle δ and angular frequency ω, where ω0 is the initial angular frequency, Pref is the active power command, and P is the actual output active power on the AC side.

3. The control method for grid-connected energy storage type SVG participating in grid frequency and voltage regulation according to claim 2, characterized in that, The information based on angular frequency ω and grid connection frequency ω ac Or the frequency deviation may include: When there is a frequency deviation Δω=ω between the grid connection point frequency and the internal angular velocity. ac When -ω, the control system automatically adjusts the Pref command to provide active power output through the energy storage unit.

4. The control method for grid-connected energy storage type SVG participating in grid frequency and voltage regulation according to claim 1, characterized in that, The process of generating an internal voltage command value using reactive power-voltage droop control based on the deviation between the grid connection point voltage and the reference voltage includes: Real-time detection of reactive power Q and reactive power command Qref output by grid-connected energy storage SVG, and measurement of voltage amplitude U at grid connection point. PCC The internal reference voltage amplitude E* is generated according to the droop formula: E * =U0-k Q (Q-Q ref ) Where k Q The initial value is set to 0.05, and it is automatically corrected through subsequent adaptive adjustments.

5. The control method for grid-connected energy storage type SVG participating in grid frequency and voltage regulation according to claim 1, characterized in that, The real-time adjustment of the reactive power-voltage droop coefficient and virtual admittance parameters based on frequency and voltage deviations includes: Combined steady-state virtual admittance Calculate the current reference I in dq coordinates * =Y0(E * -U PCC Simultaneously, Δω and ΔU are monitored in real time, and adaptive control is applied: k Q (t+Δt)=k Q (t)+γ Q ΔU,R0(t+Δt)=R0(t+γ R Δω dynamically adjusts the reactive power-voltage droop coefficient k Q With virtual admittance parameter R0.

6. The control method for grid-connected energy storage type SVG participating in grid frequency and voltage regulation according to claim 1, characterized in that, The process of generating a current reference value using the updated virtual admittance parameters, and finally outputting a voltage- and frequency-modulated current after current decoupling and PWM drive, includes: Will I * Decoupling to I d * I q * After being regulated by a PI controller, the cascaded H-bridge sub-module is controlled by a three-level PWM module to achieve the target current output.

7. The control method for grid-connected energy storage type SVG participating in grid frequency and voltage regulation according to claim 1, characterized in that, Configure the energy storage capacity according to the larger value between the transient voltage-supported energy demand W1 and the inertia-supported energy demand W2: Transient voltage support requirements: Inertia support requirements: Ultimately, W≥max{W1,W2} was selected as the configuration standard for the energy storage system.

8. A control system for grid-connected energy storage type SVG participating in grid frequency and voltage regulation, characterized in that, include: The model building module is used to build a second-order synchronous condenser model inside the grid-connected energy storage SVG control system and generate the phase angle δ and angular frequency ω. The frequency deviation acquisition module is used to determine the frequency deviation based on the angular frequency ω and the grid connection frequency ω. ac Obtain the frequency deviation; The voltage deviation acquisition module is used to generate internal voltage command values ​​based on the deviation between the grid connection point voltage and the reference voltage, using reactive power-voltage droop control. The output adjustment module is used to adjust the reactive power-voltage droop coefficient and virtual admittance parameters in real time according to the frequency deviation and voltage deviation. The updated virtual admittance parameters are used to generate a current reference value, and finally the voltage and frequency regulated current is output through current decoupling and PWM drive.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the control method for grid-connected energy storage SVG participating in grid frequency and voltage regulation as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the control method for grid-connected energy storage SVG participating in grid frequency and voltage regulation as described in any one of claims 1 to 7.

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