A control method, system, device and medium for a grid-type energy storage converter

Abstract

The present invention relates to a control method, system, device and medium for a grid-type energy storage converter, wherein the method comprises: obtaining the operation data of a distribution station area and the cable data of a distribution line; obtaining the line voltage drop at a grid-type energy storage access point according to the operation data of the distribution station area and the cable data of the distribution line; calculating the voltage regulation amount at the grid-type energy storage access point, and calculating the active command value and reactive command value of the energy storage converter in combination with the line voltage drop at the grid-type energy storage access point; comparing the active command value and reactive command value with the active power calculation value and reactive power calculation value calculated according to the real-time voltage and current at the access point, and obtaining the switching amount of the grid-type energy storage converter based on the comparison result. The present invention can effectively improve the problem of voltage over-limit of distributed photovoltaic grid-connected power in the substation area and improve the power supply capacity of the distribution station area.

Description

Technical Field

[0001] The present invention relates to the technical field of grid-connected control, and in particular to a control method, system, equipment and medium for a grid-connected energy storage converter. Background Art

[0002] The large-scale access of distributed photovoltaics has made the randomness of the source and load of the distribution network more and more prominent, resulting in serious voltage fluctuations and over-limit phenomena. In addition, the combined superposition of three-phase imbalance and harmonics has an impact on voltage over-limit, making voltage fluctuations and over-limit more severe, becoming one of the main factors restricting the development of distributed photovoltaics. The high proportion of low-voltage distributed photovoltaics connected to the distribution station area has caused the user's overvoltage problem to become prominent. Severe overvoltage can easily cause damage to user equipment. There are even photovoltaic stations where the voltage exceeds the upper limit during the day and the lower limit at night, which seriously affects the power supply quality. The large-scale access of distributed energy represented by wind power and photovoltaics to the power grid has led to a continuous increase in the penetration rate of renewable energy based on power electronic converters, making the power system have a trend of small inertia and weak system strength, and the stability problem is becoming more and more serious. With the advancement of the construction of new power systems, distributed photovoltaics are showing a trend of large-scale development. Low-voltage photovoltaic stations are facing problems such as heavy reverse overload of distribution transformers, over-limit of power supply voltage, weakened distribution network strength, and insufficient toughness. At present, most converters adopt the grid-following control mode, relying on grid-connected point phase locking to achieve grid synchronization. The phase-locking method based on the grid-connected point voltage brings negative resistance, which is the core reason for the decrease in the stability of the converter connected to the weak grid. Power synchronization is a good synchronization method to improve the stability of the weak grid. Since the grid-following converter essentially presents the characteristics of a current source, its normal operation requires the existence of a voltage source in the system to build a voltage for its grid-connected point, which makes it difficult to provide inertia support for the grid. The grid-building converter controls the converter to output a voltage source by drawing on the physical mechanism and control method of the synchronous generator, and achieves synchronous operation by controlling its own output power. It enables the converter to build the output voltage on the AC side without relying on the external AC system, thereby achieving rapid frequency and voltage regulation, increasing inertia and short-circuit capacity, and suppressing broadband oscillations, which can effectively improve the acceptance capacity of new energy. With the large-scale access of new energy, the operation mode based on the current source leads to the weakening of the voltage control ability of the power grid. The grid-building energy storage with voltage source characteristics can support the voltage.

[0003] The rapid development of medium and low voltage distributed photovoltaics has brought about great pressure on local consumption of new energy, uncertainty in supply and demand, normalization of supply guarantee, and downward pressure on balance. Conventional methods and large-scale replacement of distribution transformers still cannot solve the problem of user overvoltage. The addition of new distribution transformers may cause heavy overload of the upper power grid lines or distribution transformers, and still cannot effectively and comprehensively solve the above problems. In the face of profound changes in the source and load of distribution stations during the construction of new power systems, it is urgent to study grid-based energy storage technology, use grid-based energy storage to actively support voltage and frequency and networking capabilities, and combine the impedance characteristics of distribution stations to study methods for grid-based energy storage to improve the reliable and high-quality power supply capabilities of distribution stations, so as to improve the distribution station area's carrying capacity for distributed power sources and local consumption capabilities.

[0004] The existing patent document CN116599096A discloses a grid-type energy storage system and its control method, which monitors the frequency and voltage at the common connection point (PCC). When the frequency / voltage at the PCC exceeds the limit, the active and reactive power added values ​​of each grid-type energy storage equipment connected to the power grid through the PCC are determined according to the changes in the active and reactive power of the system. Although this technical solution ensures the stability of frequency and voltage at the PCC by processing the active and reactive power added values, it cannot achieve load-side over-limit management caused by distributed photovoltaic access.

[0005] The existing patent document CN116154812A discloses a grid-type energy storage control method and system for the problem of grid voltage operation, which includes: obtaining the bus voltage data of the new energy collection station in real time, generating the bus voltage deviation based on the bus voltage data and the bus voltage reference value; when the bus voltage deviation is greater than the preset bus voltage deviation threshold, starting the energy storage active control, energy storage reactive regulation control and energy storage comprehensive control. This technical solution involves the problem of voltage over-limit in the distribution network under weak network conditions, and does not involve the problem of energy storage capacity configuration, so it cannot solve the problem of the economy of energy storage configuration in the distribution network. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a control method, system, device and medium for a grid-connected energy storage inverter, which can effectively improve the voltage over-limit problem of distributed photovoltaic grid-connected power distribution areas and enhance the power supply capacity of distribution stations.

[0007] The technical solution adopted by the present invention to solve the technical problem is: to provide a control method for a grid-type energy storage converter, comprising the following steps:

[0008] Obtain the operation data of the distribution substation area and the cable data of the distribution line;

[0009] Obtaining a line voltage drop at a grid-type energy storage access point according to the operation data of the distribution station area and the cable data of the distribution line;

[0010] Calculate the voltage regulation amount at the grid-type energy storage access point, and calculate the active command value and reactive command value of the energy storage converter in combination with the line voltage drop at the grid-type energy storage access point;

[0011] The active power command value and the reactive power command value are compared with the active power calculation value and the reactive power calculation value calculated according to the real-time voltage and current at the access point, and the switching value of the grid-type energy storage converter is obtained based on the comparison result.

[0012] The operation data of the distribution station area includes the distribution transformer gateway voltage, user load active power and transformer port reactive power; the cable data of the distribution line includes the resistance and reactance of the power supply line.

[0013] The line voltage drop at the grid-type energy storage access point is Calculated, where Δ U To construct the line voltage drop at the access point of the grid-type energy storage, P 1 is the active power of user load, Q 1 is the reactive power at the transformer port, U is the distribution transformer junction voltage, R is the resistance of the power supply line, X C is the reactance of the power supply line.

[0014] The calculating of the voltage regulation amount at the grid-forming energy storage access point and the calculating of the active command value and the reactive command value of the energy storage converter in combination with the line voltage drop at the grid-forming energy storage access point specifically include:

[0015] Calculate the voltage regulation at the grid-connected energy storage access point;

[0016] In combination with the line voltage drop at the grid-type energy storage access point, the active command value and the reactive command value of the energy storage converter are calculated according to the voltage regulation amount.

[0017] The voltage regulation is achieved by Calculated, where Δ U 1 is the voltage regulation amount, U 1 is the effective value of the voltage at the access point of the grid-type energy storage, U’ is the output voltage of the low voltage distribution network.

[0018] The active command value and reactive command value of the energy storage converter are calculated according to the voltage regulation amount in combination with the line voltage drop at the access point of the grid-type energy storage. Specifically, for the reactive power part, the control direction is to achieve zero reactive power loss of the line, and the control target is to make the reactive command value of the grid-type energy storage the same as the reactive power amplitude at the outlet of the distribution transformer. For the active power part, the active command value is calculated using the line voltage drop formula in combination with the line voltage drop at the access point of the grid-type energy storage.

[0019] The active power command value is Calculated, among which, P ref is the active power command value, U is the distribution transformer junction voltage, R is the resistance of the power supply line, X C is the reactance of the power supply line, Δ U To construct the line voltage drop at the access point of the grid-type energy storage, Q 1 is the reactive power at the transformer port.

[0020] Before calculating the voltage regulation amount at the grid-connected energy storage access point, the method further includes: adjusting the upper and lower limits of the voltage according to the distribution network voltage data information and the full data deviation requirement.

[0021] The technical solution adopted by the present invention to solve the technical problem is: to provide a control system of a grid-type energy storage converter, comprising:

[0022] An acquisition module is used to obtain the operation data of the distribution station area and the cable data of the distribution line;

[0023] A line voltage drop determination module, used to obtain the line voltage drop at the grid-type energy storage access point according to the operation data of the distribution station area and the cable data of the distribution line;

[0024] A calculation module, used to calculate the voltage regulation amount at the grid-forming energy storage access point, and calculate the active command value and reactive command value of the energy storage converter in combination with the line voltage drop at the grid-forming energy storage access point;

[0025] The control module is used to compare the active power command value and the reactive power command value with the active power calculation value and the reactive power calculation value calculated according to the real-time voltage and current at the access point, and obtain the switching value of the grid-type energy storage converter based on the comparison result.

[0026] The technical solution adopted by the present invention to solve its technical problem is: to provide an electronic device, including a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the control method of the above-mentioned grid-type energy storage inverter when executing the computer program.

[0027] The technical solution adopted by the present invention to solve its technical problem is: providing a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the control method of the above-mentioned grid-type energy storage inverter are implemented.

[0028] Beneficial Effects

[0029] Due to the adoption of the above-mentioned technical scheme, the present invention has the following advantages and positive effects compared with the prior art: the present invention solves the problems of voltage over-limit and distribution network overload by controlling the power of grid-type energy storage, and realizes the improvement of the terminal functional capacity of the distribution station under the large-scale access of low-voltage distributed photovoltaics, wherein the power control is calculated based on the distribution transformer gateway voltage, power supply line data, access load power and other data information, thereby realizing precise control of active power and reactive power, which can reduce the capacity of energy storage configured in the distribution station area and the equipment investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the control block diagram of the grid-type energy storage connected to the low-voltage distribution network;

[0031] Figure 2 It is a flow chart of a control method for improving the power supply capacity of the distribution network terminal by grid-connected energy storage according to the first embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0033] Active distribution substations with a high proportion of distributed photovoltaic access may experience power quality problems such as reverse power flow and voltage over-limit. Grid-type energy storage inverters have the active support capability of voltage and frequency, which improves the reliable and high-quality power supply capability of distribution substations. Figure 1 As shown. Among them, the low-voltage distribution network transformer is 10kV / 380V. Due to the access of distributed photovoltaics, the distribution transformer line will have overvoltage during the day. The grid-type energy storage system is connected to the location where the voltage change is most serious. The grid-type energy storage system includes an energy storage inverter, an energy storage battery and a BMS (battery management system). Traditional control uses the energy storage system to charge and discharge when the voltage exceeds the limit to regulate the voltage from the perspective of the distribution network. The present invention not only considers the regulation effect of charging and discharging, but also considers the characteristics of the grid-type energy storage, and further adjusts from the perspective of reactive capacity, which increases the voltage regulation range and reduces the capacity of the configured energy storage.

[0034] The first embodiment of the present invention relates to a control method for a grid-connected energy storage converter, which can improve the power supply capacity of the distribution network terminal. Figure 2 As shown, the following steps are included:

[0035] Step 1: Obtain the operating data of the distribution area and the cable data of the distribution line. The operating data of the distribution area obtained in this step may include the voltage at the distribution transformer junction. U , user load active power P 1. Transformer port reactive power Q 1. The cable data of the distribution line includes the resistance of the power supply line R and the reactance of the power supply line X C Among them, the resistance of the power supply line R Can be It is calculated that the reactance of the power supply line can be Calculated, among which, ρ is the resistivity of the power supply line, L is the length of the power supply line, S is the cross-sectional area of ​​the power supply line, l represents the inductance of the power supply line, g represents the conductance of the power supply line, D m represents the geometric mean distance of the three-phase conductors, r Indicates the radius of the wire.

[0036] Step 2: Obtain the line voltage drop at the grid-type energy storage access point based on the operation data of the distribution station area and the cable data of the distribution line. Calculate the line voltage drop at the grid-type energy storage access point, where Δ U It is the line voltage drop at the access point of the grid-type energy storage.

[0037] Step 3, calculate the voltage regulation amount at the grid-type energy storage access point, and calculate the active command value and reactive command value of the energy storage converter in combination with the line voltage drop at the grid-type energy storage access point. This step specifically includes:

[0038] The voltage outer loop control is used to calculate the voltage regulation at the grid-type energy storage access point, where the voltage regulation is calculated by Calculated, where Δ U 1 is the voltage regulation amount, U 1 is the effective value of the voltage at the access point of the grid-type energy storage, U’ is the output voltage of the low voltage distribution network. U’ =380V.

[0039] Combined with the line voltage drop at the grid-type energy storage access point, the voltage regulation amount is calculated through the optimization algorithm to obtain the active command value and reactive command value of the energy storage converter. In order to achieve voltage management at the grid-type energy storage access point, it is necessary to ensure zero voltage drop from the transmission line to the energy storage access point. Therefore, the optimization algorithm is specifically as follows: for the reactive power part, the control direction is to achieve zero reactive power loss of the line, and the control target is to set the reactive command value of the grid-type energy storage Q ref The same as the reactive power amplitude at the outlet of the distribution transformer, that is, ; For the active power part, the line voltage drop formula is used in combination with the line voltage drop at the grid-type energy storage access point to calculate the active power command value P ref , calculated as: .

[0040] It is worth mentioning that before using the voltage outer loop control to calculate the voltage regulation amount at the grid-type energy storage access point, this implementation also includes: adjusting the upper limit of the voltage according to the distribution network voltage data information and the full data deviation requirements U u and lower limit U d , where the upper limit of the voltage U u pass The lower limit of voltage is calculated. U d pass Calculated, U N Indicates the voltage rating at the energy storage access point. λ is the voltage regulation proportional coefficient, V m is the voltage operating deviation range.

[0041] It can be seen that before calculating the voltage regulation amount at the grid-type energy storage access point, this implementation also adjusts the upper and lower limits of the voltage according to the distribution network voltage data information and the full data deviation requirements, thereby solving the voltage over-limit problem caused by the distributed photovoltaic access to the distribution network.

[0042] Step 4: The active power command value P ref and reactive power command value Q ref , and the active power calculated based on the real-time voltage and current data at the access point P e and reactive power calculation value Q e A comparison is made, and based on the comparison result, the switching value of the grid-type energy storage converter is obtained by adopting a PI control method.

[0043] It is not difficult to find that this implementation method solves the problems of voltage over-limit and distribution network overload by controlling the power of grid-type energy storage, and realizes the improvement of the terminal functional capacity of the distribution station under the large-scale access of low-voltage distributed photovoltaics. The power control is calculated based on the distribution transformer gateway voltage, power supply line data, access load power and other data information, and realizes precise control of active power and reactive power. It can reduce the capacity and equipment investment cost of energy storage configured in the distribution station area, and realize the inertia support and voltage management functions under weak grid conditions.

[0044] The second embodiment of the present invention relates to a control system for improving the power supply capacity of the distribution network terminal by using a grid-connected energy storage, comprising:

[0045] An acquisition module is used to obtain the operation data of the distribution station area and the cable data of the distribution line;

[0046] A line voltage drop determination module, used to obtain the line voltage drop at the grid-type energy storage access point according to the operation data of the distribution station area and the cable data of the distribution line;

[0047] A calculation module, used to calculate the voltage regulation amount at the grid-forming energy storage access point, and calculate the active command value and reactive command value of the energy storage converter in combination with the line voltage drop at the grid-forming energy storage access point;

[0048] The control module is used to compare the active power command value and the reactive power command value with the active power calculation value and the reactive power calculation value calculated according to the real-time voltage and current at the access point, and obtain the switching value of the grid-type energy storage converter based on the comparison result.

[0049] The operation data of the distribution station area includes the distribution transformer gateway voltage, user load active power and transformer port reactive power; the cable data of the distribution line includes the resistance and reactance of the power supply line.

[0050] The line voltage drop determination module is Calculate the line voltage drop at the grid-type energy storage access point, where Δ U To construct the line voltage drop at the access point of the grid-type energy storage, P 1 is the active power of user load, Q 1 is the reactive power at the transformer port, U is the distribution transformer junction voltage, R is the resistance of the power supply line, X C is the reactance of the power supply line.

[0051] The calculation module comprises:

[0052] A first calculation unit is used to calculate the voltage regulation amount at the grid-type energy storage access point by using the voltage outer loop control;

[0053] The second calculation unit is used to calculate the active command value and reactive command value of the energy storage converter by combining the voltage regulation amount with the line voltage drop at the grid-type energy storage access point through an optimization algorithm.

[0054] The first computing unit Calculate the voltage regulation amount, where Δ U 1 is the voltage regulation amount, U 1 is the effective value of the voltage at the access point of the grid-type energy storage, U’ is the output voltage of the low voltage distribution network.

[0055] The optimization algorithm is specifically as follows: for the reactive power part, the control direction is to achieve zero reactive power loss of the line, and the control target is to make the reactive command value of the grid-type energy storage the same as the reactive power amplitude at the outlet of the distribution transformer. For the active power part, the line voltage drop formula is used in combination with the line voltage drop at the access point of the grid-type energy storage to calculate the active command value.

[0056] The active power command value is Calculated, among which, P ref is the active power command value, U is the distribution transformer junction voltage, R is the resistance of the power supply line, X C is the reactance of the power supply line, Δ U To construct the line voltage drop at the access point of the grid-type energy storage, Q 1 is the reactive power at the transformer port.

[0057] The first computing unit also includes:

[0058] The adjustment unit is used to adjust the upper and lower limits of the voltage according to the distribution network voltage data information and the full data deviation requirements.

[0059] A third embodiment of the present invention relates to an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the control method for improving the power supply capacity of the distribution network terminal by the above-mentioned grid-type energy storage are implemented.

[0060] The fourth embodiment of the present invention relates to a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the control method for improving the power supply capacity of the distribution network terminal by the above-mentioned grid-type energy storage.

[0061] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0062] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. 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.

[0063] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction method, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0064] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions 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.

Claims

1. A control method for a grid-type energy storage converter, characterized in that: The following steps are involved: Obtain the operation data of the distribution substation area and the cable data of the distribution line; Obtaining a line voltage drop at a grid-type energy storage access point according to the operation data of the distribution station area and the cable data of the distribution line; Calculating the voltage regulation amount at the grid-type energy storage access point, and calculating the active command value and reactive command value of the energy storage converter in combination with the line voltage drop at the grid-type energy storage access point, specifically including: Calculate the voltage regulation amount at the grid-type energy storage access point, wherein the voltage regulation amount is calculated by ΔU1=U′-U1, wherein ΔU1 is the voltage regulation amount, U1 is the effective value of the voltage at the grid-type energy storage access point, and U′ is the output voltage of the low-voltage distribution network; Combined with the line voltage drop at the access point of the grid-type energy storage, the active command value and reactive command value of the energy storage converter are calculated according to the voltage regulation amount, specifically: for the reactive power part, the control direction is to achieve zero reactive power loss of the line, and the control target is to make the reactive command value of the grid-type energy storage the same as the reactive power amplitude at the outlet of the distribution transformer; for the active power part, the line voltage drop formula is used in combination with the line voltage drop at the access point of the grid-type energy storage to calculate the active command value; wherein, the active command value is calculated by Calculated, where P ref is the active power command value, U is the distribution transformer junction voltage, R is the resistance of the power supply line, X C is the reactance of the power supply line, ΔU is the line voltage drop at the access point of the grid-type energy storage, and Q1 is the reactive power at the transformer port; The active power command value and the reactive power command value are compared with the active power calculation value and the reactive power calculation value calculated according to the real-time voltage and current at the access point, and the switching value of the grid-type energy storage converter is obtained based on the comparison result.

2. The control method of the grid-type energy storage converter according to claim 1, characterized in that: The operation data of the distribution station area includes the distribution transformer gateway voltage, user load active power and transformer port reactive power; the cable data of the distribution line includes the resistance and reactance of the power supply line.

3. The control method of the grid-type energy storage converter according to claim 1, characterized in that: The line voltage drop at the grid-type energy storage access point is Calculated, where ΔU is the line voltage drop at the grid-type energy storage access point, P1 is the user load active power, Q1 is the transformer port reactive power, U is the distribution transformer junction voltage, R is the resistance of the power supply line, and X C is the reactance of the power supply line.

4. The control method of the grid-type energy storage converter according to claim 1, characterized in that: Before calculating the voltage regulation amount at the grid-connected energy storage access point, the method further includes: adjusting the upper and lower limits of the voltage according to the distribution network voltage data information and the full data deviation requirement.

5. A control system for a grid-type energy storage converter, characterized in that: include: An acquisition module is used to obtain the operation data of the distribution station area and the cable data of the distribution line; A line voltage drop determination module, used to obtain the line voltage drop at the grid-type energy storage access point according to the operation data of the distribution station area and the cable data of the distribution line; A calculation module is used to calculate the voltage regulation amount at the grid-type energy storage access point, and calculate the active command value and reactive command value of the energy storage converter in combination with the line voltage drop at the grid-type energy storage access point; the calculation module includes: A first calculation unit is used to calculate the voltage regulation amount at the grid-type energy storage access point by using the voltage outer loop control, wherein the first calculation unit calculates the voltage regulation amount by ΔU1=U′-U1, wherein ΔU1 is the voltage regulation amount, U1 is the effective value of the voltage at the grid-type energy storage access point, and U′ is the output voltage of the low-voltage distribution network; The second calculation unit is used to calculate the active command value and reactive command value of the energy storage converter by combining the line voltage drop at the access point of the grid-type energy storage with the voltage regulation amount through an optimization algorithm; the optimization algorithm is specifically as follows: for the reactive power part, the control direction is to achieve zero reactive power loss of the line, and the control target is to make the reactive command value of the grid-type energy storage the same as the reactive power amplitude at the outlet of the distribution transformer; for the active power part, the line voltage drop formula is used in combination with the line voltage drop at the access point of the grid-type energy storage to calculate the active command value; the active command value is calculated by Calculated, where P ref is the active power command value, U is the distribution transformer junction voltage, R is the resistance of the power supply line, X C is the reactance of the power supply line, ΔU is the line voltage drop at the access point of the grid-type energy storage, and Q1 is the reactive power at the transformer port; The control module is used to compare the active power command value and the reactive power command value with the active power calculation value and the reactive power calculation value calculated according to the real-time voltage and current at the access point, and obtain the switching value of the grid-type energy storage converter based on the comparison result.

6. An electronic 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, the steps of the control method of the grid-type energy storage converter as described in any one of claims 1-4 are implemented.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the control method of the grid-type energy storage converter as claimed in any one of claims 1 to 4 are implemented.

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