Network construction type energy storage output power regulation and control method, device, equipment and medium

Abstract

The invention discloses a network construction type energy storage output power regulation and control method, device and equipment and a medium, and relates to the field of power electronic stability, and the method comprises the steps: respectively determining active output and reactive output based on the average active power and the average reactive power of network construction type energy storage output and a preset power distribution coefficient; determining a first expression of an active fluctuation amplitude according to the grid-connected topological structure of the network construction type energy storage, the active output and the reactive output, and determining a second expression of a first maximum phase current output by the network construction type energy storage after a power grid fault; determining a reactive safety area based on the second maximum phase current, the maximum active fluctuation amplitude, the first expression and the second expression, determining an active safety area through a first parameter corresponding to the reactive safety area, and determining a second parameter according to the active safety area; and determining a current instruction of the network construction type energy storage through the first parameter and the second parameter, and regulating and controlling the output power of the network construction type energy storage according to the current instruction. And accurate regulation and control of the output power can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power electronic stability, in particular to a grid-constructed energy storage output power regulation method, device, equipment and medium. BACKGROUND

[0002] To achieve the goal, improve the resilience of the receiving end power grid, promote the efficient consumption of new energy in mountainous areas, optimize the economic type of power supply, and support energy transformation. Grid-constructed energy storage devices have gradually become the energy security cornerstone and transformation engine in some regions. When the power grid fails asymmetrically, the grid-constructed energy storage system will contain negative sequence voltage / current, so its output power will have a two-frequency fluctuation. From the perspective of the power system, the premise of the stability of the DC bus capacitor voltage is the conservation of the input power on the DC side and the output power on the AC side, so when there is a two-frequency fluctuation of active power, the DC bus voltage will also have a two-frequency fluctuation. Excessive voltage fluctuation is not conducive to the safe operation of the grid-constructed energy storage grid-connected system; at the same time, the two-frequency fluctuation of the DC voltage will further cause the three-frequency harmonic component in the grid-connected current on the AC side, and excessive harmonic current does not meet the grid-connected standard allowed by the national standard; and when the grid voltage drops to a large extent, the grid-constructed energy storage needs to provide sufficient reactive power to support the fault ride-through of the power grid, so its output current will be much higher than the rated working current, and the power electronic device is easy to be damaged when working in an overload state for a long time. Therefore, a reasonable control method needs to be used to solve the power quality problems faced by the grid-constructed energy storage under asymmetric grid faults. For grid-constructed energy storage, existing research focuses on optimizing a single target or two targets in terms of control effect, aiming to completely eliminate a factor affecting power quality, but some unfavorable factors that are ignored will be amplified, such as the complete elimination of active power fluctuation will lead to an increase in harmonic current. However, in actual engineering, it is not necessary to completely eliminate a certain unfavorable factor, but only to limit various factors that are not conducive to the safety of the system within a safe and controllable range. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a grid-constructed energy storage output power regulation method, device, equipment and medium, which can accurately regulate the output power of the grid-constructed energy storage during a fault and ensure that the power quality during the fault ride-through is within a safe range. The specific scheme is as follows:

[0004] In a first aspect, the present application discloses a grid-constructed energy storage output power regulation method, comprising:

[0005] determine active power output and reactive power output of the grid-forming energy storage based on average active power and average reactive power of the grid-forming energy storage output and preset power distribution coefficients; the active power output includes positive sequence active power output and negative sequence active power output; the reactive power output includes positive sequence reactive power output and negative sequence reactive power output;

[0006] determine a first expression of active power fluctuation amplitude according to the grid-connected topology of the grid-forming energy storage, the active power output and the reactive power output, and determine a second expression of a first maximum phase current output by the grid-forming energy storage after a power grid fault according to the active power output and the reactive power output;

[0007] determine a reactive power safety region based on the second maximum phase current, the maximum active power fluctuation amplitude, the first expression and the second expression, determine an active power safety region through a first parameter corresponding to the reactive power safety region, and determine a second parameter according to the active power safety region; the first parameter includes reactive power and reactive power distribution coefficient; the second parameter includes active power and active power distribution coefficient; the second maximum phase current is a maximum phase current allowed to be output by the grid-forming energy storage when the power grid is normal;

[0008] determine a current instruction of the grid-forming energy storage through the first parameter and the second parameter, and regulate and control the output power of the grid-forming energy storage according to the current instruction.

[0009] Optionally, before the determining of the active power output and the reactive power output of the grid-forming energy storage based on the average active power and the average reactive power of the grid-forming energy storage output and the preset power distribution coefficients, the method further comprises

[0010] determining whether an asymmetric fault occurs in the power grid;

[0011] if the asymmetric fault does not occur in the power grid, prohibiting the operation of determining the active power output and the reactive power output of the grid-forming energy storage based on the average active power and the average reactive power of the grid-forming energy storage output and the preset power distribution coefficients;

[0012] if the asymmetric fault occurs in the power grid and the grid-connected current unbalance degree is less than or equal to a target value, prohibiting the operation of determining the active power output and the reactive power output of the grid-forming energy storage based on the average active power and the average reactive power of the grid-forming energy storage output and the preset power distribution coefficients;

[0013] if the asymmetric fault occurs in the power grid and the grid-connected current unbalance degree is greater than the target value, triggering the operation of determining the active power output and the reactive power output of the grid-forming energy storage based on the average active power and the average reactive power of the grid-forming energy storage output and the preset power distribution coefficients.

[0014] Optionally, the average active power and the average reactive power based on the grid-forming energy storage output and the preset power distribution coefficient are used to determine the active output and the reactive output of the grid-forming energy storage, respectively, including:

[0015] The average active power and the average reactive power based on the grid-forming energy storage output and the preset power distribution coefficient are used to determine the active output and the reactive output of the grid-forming energy storage, respectively, by an output determination formula; the output determination formula is:

[0016] ;

[0017] Wherein, and are the positive sequence active output and the negative sequence active output of the grid-forming energy storage; and are the positive sequence reactive output and the negative sequence reactive output of the grid-forming energy storage; P and Q are the average active power and the average reactive power of the grid-forming energy storage output, respectively; is the preset active power distribution coefficient; is the preset reactive power distribution coefficient.

[0018] Optionally, the first expression is:

[0019] ;

[0020] Wherein, is the active fluctuation amplitude; and are the positive sequence output voltage amplitude and the negative sequence output voltage amplitude of the grid-forming energy storage grid-connected port output; P and Q are the average active power and the average reactive power of the grid-forming energy storage output, respectively; is the preset active power distribution coefficient; is the first expression of the active fluctuation amplitude;

[0021] The second expression is:

[0022] ;

[0023] Wherein, is the first maximum phase current output by the grid-forming energy storage after the grid fault; is the angular frequency of the grid-forming energy storage output; is the equivalent impedance of the grid; and are the positive sequence voltage amplitude and the negative sequence voltage amplitude of the grid; P and Q are the average active power and the average reactive power of the grid-forming energy storage output, respectively; is the preset reactive power distribution coefficient; is the second expression of the first maximum phase current.

[0024] Optionally, the determining the reactive power safety region based on the second maximum phase current, the maximum active power fluctuation amplitude, the first expression and the second expression comprises:

[0025] setting a first constraint condition; the first constraint condition is that the positive sequence active power output of the grid-forming energy storage, the negative sequence active power output of the grid-forming energy storage, the average active power of the grid-forming energy storage output and the preset active power distribution coefficient are all set to 0;

[0026] constructing a first inequality based on the maximum active power fluctuation amplitude and the first expression according to the first constraint condition; the first inequality is:

[0027]

[0028] wherein, is the maximum active power fluctuation amplitude;

[0029] constructing a second inequality based on the second maximum phase current and the second expression according to the first constraint condition; the second inequality is:

[0030]

[0031] wherein, is the second maximum phase current;

[0032] solving the first inequality and the second inequality, and determining the corresponding solution as the value range corresponding to the reactive power safety region.

[0033] Optionally, the determining the active power safety region through the first parameter corresponding to the reactive power safety region, and determining the second parameter according to the active power safety region comprises:

[0034] determining the first parameter according to the value range corresponding to the reactive power safety region;

[0035] setting a second constraint condition; the second constraint condition is that the values of the average reactive power and the preset reactive power distribution coefficient in the first expression and the second expression are respectively set to the reactive power and the reactive power distribution coefficient in the first parameter;

[0036] solving the first inequality and the second inequality based on the second constraint condition and the constraint condition that the active power fluctuation amplitude is less than the maximum active power fluctuation amplitude, and the first maximum phase current is less than the second maximum phase current, and determining the corresponding solution as the value range corresponding to the active power safety region;

[0037] ​​determine the second parameter based on the target active power output of the grid-forming energy storage and the minimum value of the active power fluctuation amplitude through the value range corresponding to the active safety region.

[0038] Or, determine the second parameter based on the target active power output of the grid-forming energy storage and the minimum value of the maximum phase current through the value range corresponding to the active safety region.

[0039] Or, determine the second parameter based on the target active power output of the grid-forming energy storage and the minimum value of the active power fluctuation amplitude through the value range corresponding to the active safety region.

[0040] Optionally, the determination of the current instruction of the grid-forming energy storage based on the first parameter and the second parameter comprises:

[0041] determine the positive sequence active power output and the negative sequence active power output and the positive sequence reactive power output and the negative sequence reactive power output of the grid-forming energy storage based on the first parameter and the second parameter;

[0042] determine the current instruction of the grid-forming energy storage based on a target relationship between the current instruction and the active power output and the reactive power output; the target relationship is:

[0043] ;

[0044] wherein, and are the positive sequence active power output and the negative sequence active power output of the grid-forming energy storage, respectively; and are the positive sequence reactive power output and the negative sequence reactive power output of the grid-forming energy storage, respectively; is the angular frequency of the output of the grid-forming energy storage; is the equivalent impedance of the power grid; and are the d-axis positive sequence voltage and the q-axis positive sequence voltage of the power grid voltage in the dq coordinate system, respectively; and are the d-axis negative sequence voltage and the q-axis negative sequence voltage of the power grid voltage in the dq coordinate system, respectively; and are the d-axis positive sequence current and the q-axis positive sequence current of the grid-forming energy storage in the dq coordinate system, respectively; and are the d-axis negative sequence current and the q-axis negative sequence current of the grid-forming energy storage in the dq coordinate system, respectively;

[0045] wherein, the current instruction comprises a positive sequence d-axis current instruction, a positive sequence q-axis current instruction, a negative sequence d-axis current instruction, and a negative sequence q-axis current instruction.

[0046] In a second aspect, the application discloses a grid-forming energy storage output power regulation device, comprising:

[0047] an output determination module configured to determine active output and reactive output of the grid-forming energy storage based on average active power and average reactive power of grid-forming energy storage output and a preset power distribution coefficient; the active output includes positive sequence active output and negative sequence active output; the reactive output includes positive sequence reactive output and negative sequence reactive output;

[0048] an expression determination module configured to determine a first expression of active fluctuation amplitude according to grid-connected topology of the grid-forming energy storage, the active output and the reactive output, and determine a second expression of first maximum phase current of the grid-forming energy storage output after power grid failure according to the active output and the reactive output;

[0049] a safe region and parameter determination module configured to determine a reactive safe region based on the second maximum phase current, the maximum active fluctuation amplitude, the first expression and the second expression, determine an active safe region through a first parameter corresponding to the reactive safe region, and determine a second parameter according to the active safe region; the first parameter includes reactive power and reactive power distribution coefficient; the second parameter includes active power and active power distribution coefficient; the second maximum phase current is a maximum phase current allowed to be output by the grid-forming energy storage when the power grid is normal;

[0050] an output power regulation module configured to determine a current instruction of the grid-forming energy storage through the first parameter and the second parameter, and regulate output power of the grid-forming energy storage according to the current instruction.

[0051] In a third aspect, the present application discloses an electronic device, comprising:

[0052] a memory configured to store a computer program;

[0053] a processor configured to execute the computer program to implement the grid-forming energy storage output power regulation method as described above.

[0054] In a fourth aspect, the present application discloses a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the grid-forming energy storage output power regulation method as described above.

[0055] The application firstly determines active power output and reactive power output of grid-connection type energy storage based on average active power and average reactive power of grid-connection type energy storage output and preset power distribution coefficient; the active power output includes positive sequence active power output and negative sequence active power output; the reactive power output includes positive sequence reactive power output and negative sequence reactive power output; a first expression of active fluctuation amplitude is determined according to grid-connection topology of the grid-connection type energy storage, the active power output and the reactive power output, and a second expression of first maximum phase current output by the grid-connection type energy storage after power grid failure is determined according to the active power output and the reactive power output; a reactive safety region is determined based on the second maximum phase current, maximum active fluctuation amplitude, the first expression and the second expression, an active safety region is determined through a first parameter corresponding to the reactive safety region, and a second parameter is determined according to the active safety region; the first parameter includes reactive power and reactive power distribution coefficient; the second parameter includes active power and active power distribution coefficient; the second maximum phase current is the maximum phase current allowed to be output by the grid-connection type energy storage when the power grid is normal; a current instruction of the grid-connection type energy storage is determined through the first parameter and the second parameter, and output power of the grid-connection type energy storage is regulated according to the current instruction. It can be seen that, firstly, based on grid-connection topology of the grid-connection type energy storage, the application analyzes the explicit expression between DC voltage fluctuation, three times harmonic current and active fluctuation, and the approximate analytical expression of maximum phase current; then the active fluctuation and maximum phase current safety constraint condition of the grid-connection type energy storage are analyzed to obtain its safe operation region; further, combined with existing fault ride-through strategy and using positive and negative sequence current control, precise regulation of output power of the grid-connection type energy storage is realized, and the power quality during fault ride-through is ensured to be within the safety range. BRIEF DESCRIPTION OF DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0057] Figure 1 A grid-connection type energy storage output power regulation method flow chart disclosed by the present application;

[0058] Figure 2 An active safety operation region schematic diagram disclosed by the present application;

[0059] Figure 3 An active safety region cross section schematic diagram under fixed active demand disclosed by the present application;

[0060] Figure 4A network type energy storage power regulation strategy structure diagram disclosed by the application;

[0061] Figure 5 A power distribution scheme flow chart disclosed by the application;

[0062] Figure 6 A reactive power safe operation region diagram disclosed by the application;

[0063] Figure 7 A network type energy storage output power regulation device structure diagram disclosed by the application;

[0064] Figure 8 An electronic device structure diagram disclosed by the application. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0066] For network type energy storage, existing researches focus on optimization of a single target or two targets in terms of control effect, aiming to completely eliminate a factor affecting power quality, however, some adverse factors that are ignored will be amplified, for example, complete elimination of active fluctuation will lead to an increase in harmonic current. However, in actual engineering, it is not necessary to completely eliminate a certain adverse factor, but only to limit a plurality of factors adverse to system safety within a safe and controllable range. In order to solve the above technical problems, the application discloses a network type energy storage output power regulation scheme, which can realize accurate regulation of network type energy storage output power during a fault, and ensure that the power quality during fault ride-through is within a safe range.

[0067] Referring to Figure 1 The embodiment of the application discloses a network type energy storage output power regulation method, comprising:

[0068] In step S11, based on the average active power and the average reactive power of the network type energy storage output and a preset power distribution coefficient, the active output and the reactive output of the network type energy storage are determined respectively; the active output comprises positive sequence active output and negative sequence active output; and the reactive output comprises positive sequence reactive output and negative sequence reactive output.

[0069] In the actual project, it is necessary to judge whether to use the power coordination control method for improving the power quality of the grid-type energy storage during fault ride-through according to the actual fault-free condition of the power grid, that is, the triggering condition of the power coordination control method of the application needs to be determined first: whether the power grid has an asymmetric fault; if the power grid has no asymmetric fault, the operation of determining the active output and the reactive output of the grid-type energy storage based on the average active power and the average reactive power output by the grid-type energy storage and the preset power distribution coefficient is prohibited; if the power grid has an asymmetric fault and the grid current imbalance degree is less than or equal to a target value, the operation of determining the active output and the reactive output of the grid-type energy storage based on the average active power and the average reactive power output by the grid-type energy storage and the preset power distribution coefficient is prohibited; if the power grid has an asymmetric fault and the grid current imbalance degree is greater than the target value, the operation of determining the active output and the reactive output of the grid-type energy storage based on the average active power and the average reactive power output by the grid-type energy storage and the preset power distribution coefficient is triggered. In short, when the power grid has no asymmetric fault, the power coordination control method of the application is not used; when the power grid has an asymmetric fault and the grid current imbalance degree is less than or equal to 2%, the power coordination control method of the application is not used; when the power grid has an asymmetric fault and the grid current imbalance degree is greater than 2%, the power coordination control method of the application is used.

[0070] In this embodiment, when analyzing from the power system level, more attention is usually paid to the total output power of power electronic equipment, therefore, for the convenience of subsequent power capacity calculation and planning, the power distribution coefficient , is introduced here. The ratio of the positive sequence active power to the average active power is defined as ; and the ratio of the positive sequence reactive power to the average reactive power is defined as . Therefore, the average active power and the average reactive power output by the grid-type energy storage and the preset power distribution coefficient are determined based on the output determination formula to determine the active output and the reactive output of the grid-type energy storage; the output determination formula is:

[0071] ;

[0072] wherein, and are the positive sequence active output and the negative sequence active output of the grid-type energy storage respectively; and are the positive sequence reactive output and the negative sequence reactive output of the grid-type energy storage respectively; P and Q are the average active power and the average reactive power output by the grid-type energy storage respectively; is the preset active power distribution coefficient; is the preset reactive power distribution coefficient.

[0073] Step S12, determining a first expression of the active power fluctuation amplitude according to the grid-connected topology of the grid-forming energy storage, the active output and the reactive output, and determining a second expression of the first maximum phase current output by the grid-forming energy storage after the power grid fault according to the active output and the reactive output.

[0074] In this embodiment, the active power fluctuation amplitude and the maximum phase current of the grid-forming energy storage can be written as functions of P, Q, , , that is, the first expression of the active power fluctuation amplitude according to the grid-connected topology of the grid-forming energy storage, the active output and the reactive output, and the second expression of the first maximum phase current output by the grid-forming energy storage after the power grid fault according to the active output and the reactive output:

[0075] ;

[0076] ;

[0077] wherein, is the active power fluctuation amplitude; and are the positive sequence output voltage amplitude and the negative sequence output voltage amplitude of the grid-connected port output of the grid-forming energy storage; P and Q are the average active power and the average reactive power output by the grid-forming energy storage, respectively; is a preset active power distribution coefficient; is the first expression of the active power fluctuation amplitude; is the first maximum phase current output by the grid-forming energy storage after the power grid fault; is the angular frequency of the grid-forming energy storage output; is the equivalent impedance of the power grid; and are the positive sequence voltage amplitude and the negative sequence voltage amplitude of the power grid, respectively; P and Q are the average active power and the average reactive power output by the grid-forming energy storage, respectively; is a preset reactive power distribution coefficient; is the second expression of the first maximum phase current.

[0078] Step S13, determining a reactive power safety region based on the second maximum phase current, the maximum active power fluctuation amplitude, the first expression and the second expression, determining an active power safety region through a first parameter corresponding to the reactive power safety region, and determining a second parameter according to the active power safety region; the first parameter includes reactive power and reactive power distribution coefficient; the second parameter includes active power and active power distribution coefficient; the second maximum phase current is the maximum phase current allowed to be output by the grid-forming energy storage when the power grid is normal.

[0079] In this embodiment, considering that the safety operation problem and the reactive power support problem should be solved first after the power grid failure, the safety operation region of the grid-forming energy storage is depicted as follows: first, a first constraint condition is set; the first constraint condition is to set the positive sequence active output, the negative sequence active output, the average active power of the grid-forming energy storage output and the preset active power distribution coefficient of the grid-forming energy storage to 0; a first inequality is constructed based on the first constraint condition, the maximum active fluctuation amplitude and the first expression; the first inequality is:

[0080] ;

[0081] wherein, is the maximum active fluctuation amplitude.

[0082] A second inequality is constructed based on the second maximum phase current and the second expression according to the first constraint condition; the second inequality is:

[0083] ;

[0084] wherein, is the second maximum phase current.

[0085] Solving the first inequality and the second inequality, the corresponding solution is determined as the value range corresponding to the reactive power safety region.

[0086] Then, the first parameter is determined according to the value range corresponding to the reactive power safety region; a second constraint condition is set; the second constraint condition is to set the values of the average reactive power and the preset reactive power distribution coefficient in the first expression and the second expression to the reactive power and the reactive power distribution coefficient in the first parameter, respectively; based on the second constraint condition and the constraint condition that the active fluctuation amplitude is less than the maximum active fluctuation amplitude and the first maximum phase current is less than the second maximum phase current, the first inequality and the second inequality are solved, and the corresponding solution is determined as the value range corresponding to the active power safety region; the second parameter is determined through the value range corresponding to the active power safety region and the maximum active output of the grid-forming energy storage, or the second parameter is determined through the value range corresponding to the active power safety region based on the target active output of the grid-forming energy storage and the minimum value of the maximum phase current, or the second parameter is determined through the value range corresponding to the active power safety region based on the target active output of the grid-forming energy storage and the minimum value of the active fluctuation amplitude.

[0087] wherein, there are three schemes for selecting the active operation point:

[0088] 1. According to Figure 2The active safe operation region shown, where there is a point , which represents the maximum active output of grid-forming energy storage under the premise of meeting the safe operation, in some scenarios if grid-forming energy storage needs to provide as much active output as possible, the active output point that can be selected in the active safe operation region is ; , ; wherein, , respectively, the active power in the active safe operation region and the value of the active distribution coefficient k1 under the current situation; is the value of the active distribution coefficient corresponding to the maximum active output of the grid-forming energy storage.

[0089] 2. In some engineering scenarios, the power system does not need the grid-forming energy storage to provide maximum active output, but only needs a fixed active output, in this scenario, the dispatching system determines the active demand at this time, at this time, the active safe region section under the fixed active demand shown in Figure 3 can be drawn according to the fixed active output demand of the system, wherein point A represents the minimum value point of the maximum phase current, and the corresponding active distribution coefficient is , selecting this point can meet the control target of the minimum fault current.

[0090] 3. In some engineering scenarios, the power system does not need the grid-forming energy storage to provide maximum active output, but only needs a fixed active output, in this scenario, the dispatching system determines the active demand at this time, at this time, the active safe region section under the fixed active demand shown in Figure 3 can be drawn according to the fixed active output demand of the system, wherein point B represents the minimum value point of the active fluctuation amplitude, and the corresponding active distribution coefficient is , selecting this point can meet the control target of the minimum active fluctuation amplitude.

[0091] Step S14, determining the current instruction of the grid-forming energy storage through the first parameter and the second parameter, and regulating and controlling the output power of the grid-forming energy storage according to the current instruction.

[0092] In this embodiment, after determining the corresponding active operation point and reactive operation point, the positive sequence active power , the negative sequence active power , the positive sequence reactive power , and the negative sequence reactive power At this time, the positive sequence d-axis current command idp_ref, the positive sequence q-axis current command iqp_ref, the negative sequence d-axis current command idn_ref and the negative sequence q-axis current command iqn_ref of the grid-forming energy storage can be calculated according to the functional equation between the positive and negative sequence currents and the positive and negative sequence powers. Specifically, the current command of the grid-forming energy storage is determined by a target relationship between the current command and the active output and the reactive output; the target relationship is:

[0093]

[0094] wherein, and are the positive sequence active output and the negative sequence active output of the grid-forming energy storage respectively; and are the positive sequence reactive output and the negative sequence reactive output of the grid-forming energy storage respectively; is the angular frequency of the output of the grid-forming energy storage; is the equivalent impedance of the grid; and are the d-axis positive sequence voltage and the q-axis positive sequence voltage of the grid voltage in the dq coordinate system respectively; and are the d-axis negative sequence voltage and the q-axis negative sequence voltage of the grid voltage in the dq coordinate system respectively; and are the d-axis positive sequence current and the q-axis positive sequence current of the grid-forming energy storage in the dq coordinate system respectively; and are the d-axis negative sequence current and the q-axis negative sequence current of the grid-forming energy storage in the dq coordinate system respectively;

[0095] wherein, the current command includes the positive sequence d-axis current command, the positive sequence q-axis current command, the negative sequence d-axis current command and the negative sequence q-axis current command. After these commands are brought into the control structure as shown in Figure 4 , the precise regulation of the output power of the grid-forming energy storage can be realized.

[0096] It can be seen that, firstly, based on the grid-forming energy storage grid-connected topology, the explicit expressions of the DC voltage fluctuation, the three times harmonic current and the active fluctuation, and the approximate analytical expression of the maximum phase current are analyzed; then the active fluctuation and the maximum phase current safety constraint condition of the grid-forming energy storage are analyzed to obtain the safe operation area thereof; further, in combination with the existing fault ride-through strategy and by using the positive and negative sequence current control, the precise regulation of the output power of the grid-forming energy storage is realized, and the power quality during the fault ride-through is ensured to be within the safe range.

[0097] Based on the previous embodiment, the application discloses a grid-forming energy storage output power regulation method, and next, the specific implementation process will be described in detail.​

[0098] Firstly, based on the grid-connected topology of network-forming energy storage, the active power fluctuation amplitude is calculated as follows:

[0099] ;

[0100] wherein, is the active power fluctuation amplitude; and are the positive sequence output voltage amplitude and the negative sequence output voltage amplitude of the grid-connected port of the network-forming energy storage, respectively; and are the positive sequence active output and the negative sequence active output of the network-forming energy storage, respectively; and are the positive sequence reactive output and the negative sequence reactive output of the network-forming energy storage, respectively.

[0101] After the grid asymmetrical fault, the positive and negative sequence voltage amplitude expressions of the network-forming energy storage are as follows:

[0102] ;

[0103] wherein, and are the positive sequence output voltage amplitude and the negative sequence output voltage amplitude of the grid-connected port of the network-forming energy storage, respectively; and are the positive sequence active output and the negative sequence active output of the network-forming energy storage, respectively; and are the positive sequence reactive output and the negative sequence reactive output of the network-forming energy storage, respectively; is the angular frequency of the network-forming energy storage output; is the equivalent impedance of the grid; and are the positive sequence voltage amplitude and the negative sequence voltage amplitude of the grid, respectively.

[0104] When the grid is asymmetrical, the active output of the network-forming energy storage has a double-frequency alternating component When the power fluctuation , in order to maintain the power balance of the front and rear stages, the bus capacitor needs to release power, resulting in a decrease in the DC voltage When the power fluctuation <0, the bus capacitor absorbs power, resulting in an increase in the DC voltage Therefore, according to the AC-DC energy transfer relationship, the expression of the DC voltage fluctuation is as follows:

[0105] ;

[0106] wherein, is the DC voltage fluctuation amplitude; For the grid-forming energy storage active power fluctuation amplitude; For the rated value of DC voltage; For the rated angular frequency of the grid; For the DC bus capacitor.

[0107] The functional relationship between the three times frequency harmonic current of the grid-forming energy storage AC side and the active power fluctuation amplitude is as follows:

[0108] ;

[0109] Wherein, is the three times frequency harmonic current of the grid-forming energy storage AC side output; is the rated angular frequency of the grid; is the DC bus capacitor; is the grid-forming energy storage active power fluctuation amplitude; is the equivalent impedance of the grid; is the AC side filter inductance; is the rated amplitude of the grid voltage; is the rated value of DC voltage.

[0110] The expression of the positive and negative sequence current amplitude of the grid-forming energy storage after the grid asymmetrical fault is as follows:

[0111] ;

[0112] Wherein, and are the positive sequence output current amplitude and the negative sequence output current amplitude of the grid-forming energy storage grid-connected port output, respectively; and are the positive sequence active output and the negative sequence active output of the grid-forming energy storage, respectively; and are the positive sequence reactive output and the negative sequence reactive output of the grid-forming energy storage, respectively; is the angular frequency of the grid-forming energy storage output; is the equivalent impedance of the grid; and are the positive sequence voltage amplitude and the negative sequence voltage amplitude of the grid, respectively.

[0113] The maximum phase current expression of the grid-forming energy storage output is as follows:

[0114] ;

[0115] Wherein, is the first maximum phase current of the grid-forming energy storage output after the grid fault; and are the positive sequence output current amplitude and the negative sequence output current amplitude of the grid-forming energy storage grid-connected port output, respectively.

[0116] From the above processes, it can be seen that, after the asymmetric fault of the power grid, the DC voltage fluctuation and the triple-frequency harmonic current are both related to the active fluctuation amplitude, and the active fluctuation amplitude is related to the positive and negative sequence output power The maximum phase current of the grid-connected energy storage is related to the positive and negative sequence output power Therefore, the power coordination control method can be used to limit the DC voltage fluctuation, the triple-frequency harmonic current, the active fluctuation amplitude, and the maximum phase current of the grid-connected energy storage within a safe range, and a power regulation strategy of the grid-connected energy storage based on positive and negative sequence current control is proposed as shown in Figure 2 The positive d-axis current , the positive q-axis current , the negative d-axis current , and the negative q-axis current are reasonably regulated, so as to accurately control the output power , and limit the DC voltage fluctuation, the triple-frequency harmonic current, the active fluctuation amplitude, and the maximum phase current within a safe range.

[0117] Further, the optional safe operation point is referred to as a safe operation region of the grid-connected energy storage, and when the power system is analyzed from the power electronic equipment, the total output power is usually more concerned, therefore, a power distribution coefficient is introduced for subsequent power capacity calculation and planning, and then the steps based on the average active power and the average reactive power of the grid-connected energy storage and the preset power distribution coefficient are jumped to, and the specific process is shown in steps S11 to S14, which will not be described here. Finally, the output power of the grid-connected energy storage is accurately regulated.

[0118] In general, the power coordination control method has the following advantages: 1) the method overcomes the deficiency of the traditional power control method that is difficult to perform multi-objective collaborative optimization control, so that the power quality output by the grid-connected energy storage during the asymmetric fault of the power grid is within a safe and controllable range; 2) the method accurately regulates the positive and negative sequence active output and the positive and negative sequence reactive output of the grid-connected energy storage, and retains the inertia support capability; 3) the method can flexibly select the three control targets of active maximum output, minimum active fluctuation amplitude, and minimum maximum phase current according to actual engineering requirements under the premise of meeting the safe operation and reactive support.

[0119] In addition, the present application considers that the safe operation and the reactive support should be primarily solved after the fault of the power grid, and therefore the safe operation region of the grid-connected energy storage should be described according to the following steps.

[0120] As shown in Figure 5As shown, firstly, the maximum phase current allowed by grid-connected energy storage is determined according to the actual engineering conditions and standard restrictions , and the maximum active power fluctuation . Assuming that the positive and negative sequence active output is 0, i.e. active power P = 0, the active distribution coefficient = 0. Then, according to the function expression of the active power fluctuation amplitude and the maximum phase current, combined with the maximum phase current and the maximum active power fluctuation, the reactive power safety region at this time is depicted as follows:

[0121] ;

[0122] ;

[0123] wherein is the maximum active power fluctuation amplitude; is the maximum phase current allowed by the grid-connected energy storage. is the first expression of the active power fluctuation amplitude; is the second expression of the first maximum phase current.

[0124] Then, solving the above inequality is the reactive power safety region, as shown in Figure 6 , wherein the gray part is the reactive power safety region. After solving the above inequality, the value range of the reactive power safety region is obtained, and are the values of the reactive power Q and the reactive distribution coefficient allowed in the safe operation range, wherein the values should be in the gray part in Figure 6 . Based on the actual positive and negative sequence reactive power demand, appropriate reactive operation points and are selected in the reactive power safety region. Substituting the selected reactive operation points and into the function expression of the active power fluctuation amplitude and the maximum phase current, and satisfying the active power fluctuation and the maximum phase current not exceeding the limit, the following inequality is obtained:

[0125] ;

[0126] Solving the above inequality is the active power safety region, as shown in Figure 2 , wherein the gray part is the active power safety operation region. After solving the above inequality, the value range of the active power safety region is obtained, and are the values of the active power P and the active distribution coefficient allowed in the safe operation range, which should be within the gray part shown in Figure 2 , so the next step is to select appropriate active operation points and .

[0127] There are three options for selecting the active power operating point:

[0128] 1. According to Figure 2 The active power safe operating area shown contains one point. It represents the maximum active power output of grid-based energy storage under the premise of safe operation. In some scenarios, if grid-based energy storage needs to provide as much active power output as possible, the selectable active power output point within the safe operating range is... ; , ;in, , These represent the values ​​of active power and active power distribution coefficient k1 within the active power safe operating area under the current conditions. The value of the active power distribution coefficient corresponding to the maximum active power output of the grid-type energy storage.

[0129] 2. In some engineering scenarios, the power system does not require grid-based energy storage to provide maximum active power output, but only a fixed active power output. In such scenarios, the dispatch system determines the required active power, and a graph can be drawn based on the system's fixed active power output requirement. Figure 3 The cross-section of the active power safety zone under a fixed active power demand is shown, where point A represents the point of minimum maximum phase current, and the corresponding active power distribution coefficient is... Choosing this point will satisfy the control objective of minimizing fault current.

[0130] 3. In some engineering scenarios, the power system does not require grid-based energy storage to provide maximum active power output, but only a fixed active power output. In such scenarios, the dispatch system determines the required active power, and a graph can be drawn based on the system's fixed active power output requirement. Figure 3 The cross-section of the active power safety zone under a fixed active power demand is shown, where point B represents the point of minimum active power fluctuation amplitude, and the corresponding active power allocation coefficient is... Choosing this point will satisfy the control objective of minimizing the active power fluctuation amplitude.

[0131] Ultimately, the corresponding active power operating point and reactive power operating point are determined based on the actual engineering requirements.

[0132] As can be seen, this application, while ensuring safe operation and reactive power support, allows for flexible selection of three control objectives—maximizing active power output, minimizing active power fluctuation amplitude, and minimizing maximum phase current—based on actual engineering needs, thus providing guidance for the research and optimization of grid-type energy storage devices.

[0133] See Figure 7As shown, the embodiment of the present application discloses a network-constructed energy storage output power regulating device, comprising:

[0134] The output determining module 11 is configured to determine active output and reactive output of the network-constructed energy storage based on average active power and average reactive power of the network-constructed energy storage output and a preset power distribution coefficient; the active output comprises positive sequence active output and negative sequence active output; and the reactive output comprises positive sequence reactive output and negative sequence reactive output.

[0135] The expression determining module 12 is configured to determine a first expression of active fluctuation amplitude according to the grid-connected topology of the network-constructed energy storage, the active output and the reactive output, and determine a second expression of first maximum phase current output by the network-constructed energy storage after power grid failure according to the active output and the reactive output.

[0136] The safe region and parameter determining module 13 is configured to determine a reactive safe region based on the second maximum phase current, the maximum active fluctuation amplitude, the first expression and the second expression, determine an active safe region through a first parameter corresponding to the reactive safe region, and determine a second parameter according to the active safe region; the first parameter comprises reactive power and reactive power distribution coefficient; the second parameter comprises active power and active power distribution coefficient; and the second maximum phase current is a maximum phase current allowed to be output by the network-constructed energy storage when the power grid is normal.

[0137] The output power regulating module 14 is configured to determine a current instruction of the network-constructed energy storage through the first parameter and the second parameter, and regulate the output power of the network-constructed energy storage according to the current instruction.

[0138] Since the embodiments of the device part correspond to the above-mentioned embodiments, the embodiments of the device part are described with reference to the embodiments of the above-mentioned method part, and will not be described here.

[0139] As can be seen, the present application first analyzes the display expression between DC voltage fluctuation, three times harmonic current and active fluctuation, and the approximate analytical expression of maximum phase current based on the grid-connected topology of the network-constructed energy storage; then analyzes the active fluctuation and maximum phase current safety constraint condition of the network-constructed energy storage, obtains the safe operation region thereof; further, in combination with the existing fault ride-through strategy and by using positive and negative sequence current control, the accurate regulation of the output power of the network-constructed energy storage is realized, and the power quality during the fault ride-through is ensured to be within the safe range.

[0140] Further, the embodiment of the present application further discloses an electronic device, Figure 8 The electronic device 20 structure diagram shown according to an exemplary embodiment, the content in the figure cannot be considered as any limitation on the use range of the present application.

[0141] Figure 8 A structural schematic diagram of an electronic device 20 is provided in the embodiments of the present application. The electronic device 20 can specifically include at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25 and a communication bus 26. The memory 22 is configured to store a computer program, and the computer program is loaded and executed by the processor 21 to implement the related steps in the network-constructing type energy storage output power regulation method disclosed in any of the foregoing embodiments. In addition, the electronic device 20 in the embodiments of the present application can be specifically an electronic computer.

[0142] In the embodiments of the present application, the power supply 23 is configured to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and external devices, and the communication protocol followed by the communication interface 24 can be any communication protocol applicable to the technical solution of the present application, which is not specifically limited here; the input / output interface 25 is configured to obtain external input data or output data to the outside, and the specific interface type can be selected according to the specific application needs, which is not specifically limited here.

[0143] In addition, the memory 22 as a carrier for resource storage can be a read-only memory, a random access memory, a magnetic disk or an optical disk, etc., and the resources stored thereon can include an operating system 221, a computer program 222, etc., and the storage mode can be temporary storage or permanent storage.

[0144] The operating system 221 is configured to manage and control each hardware device on the electronic device 20 and the computer program 222, and can be Windows Server, Netware, Unix, Linux, etc. In addition to the computer program capable of completing the network-constructing type energy storage output power regulation method executed by the electronic device 20 disclosed in any of the foregoing embodiments, the computer program 222 can further include a computer program capable of completing other specific work.

[0145] Further, the present application further discloses a computer readable storage medium for storing a computer program; wherein the computer program is executed by a processor to implement the network-constructing type energy storage output power regulation method disclosed above. For the specific steps of the method, reference can be made to the corresponding content disclosed in the foregoing embodiments, which will not be repeated here.

[0146] The embodiments in the present specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. For the same or similar parts between the embodiments, reference can be made to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and reference can be made to the method part.

[0147] Those skilled in the art will further appreciate that the units and algorithms described in connection with the examples disclosed herein can be embodied directly in hardware, in software, or in a combination of the two. For ease of understanding, the illustrative examples have been described in general terms and with reference to flowcharts that outline the essential steps of a routine. The software can be stored on a computer readable medium, such as a floppy disk, a hard disk, a CD-ROM, a RAM, a ROM, a PROM, an EPROM, an EEPROM, a cassette, a magnetic tape, an optical data storage device, a flash memory device, or the like. The software can also be stored in a memory of a computer, computer system, or computer network, where it can be executed by a processor of the computer, computer system, or computer network. The software can also be stored in a memory of a computer, computer system, or computer network, where it can be executed by a processor of the computer, computer system, or computer network.

[0148] The steps of a method or algorithm described in connection with the examples disclosed herein can be embodied directly in hardware, in software, or in a combination of the two. Software modules can be stored in a Random Access Memory (RAM), a memory, a Read Only Memory (ROM), an Electrically Programmable ROM, an Electrically Erasable Programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0149] Finally, it should be noted that the terms "first", "second", and the like, herein do not denote any order, quantity, combination, or importance, but rather are used to distinguish one element from another, and are more especially used for the purpose of distinction from other elements in the specification. Also, the terms "comprise", "include" or "contain" or any other variant thereof are intended to encompass non-exclusive inclusions, such that processes, methods, articles, or apparatuses that comprise, include, or contain a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises, includes, or contains the recited element.

[0150] The above has introduced the technical solutions provided by the present application in detail, and the principles and implementation manners of the present application have been described by using specific examples. The above descriptions of the examples are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application, and the above descriptions of the present application should not be understood as limitations.

Claims

1. A method for regulating the output power of a grid-type energy storage system, characterized in that, include: Based on the average active power and average reactive power output of the grid-type energy storage and the preset power allocation coefficient, the active power output and reactive power output of the grid-type energy storage are determined respectively; the active power output includes positive sequence active power output and negative sequence active power output; the reactive power output includes positive sequence reactive power output and negative sequence reactive power output. Based on the grid-connected topology of the grid-type energy storage, the active power output, and the reactive power output, a first expression for the active power fluctuation amplitude is determined, and based on the active power output and the reactive power output, a second expression for the first maximum phase current output by the grid-type energy storage after a grid fault is determined. The reactive power safety zone is determined based on the second maximum phase current, the maximum active power fluctuation amplitude, the first expression, and the second expression. The active power safety zone is determined by the first parameter corresponding to the reactive power safety zone, and the second parameter is determined based on the active power safety zone. The first parameter includes reactive power and reactive power allocation coefficient. The second parameter includes active power and active power allocation coefficient. The second maximum phase current is the maximum phase current that the grid-type energy storage is allowed to output when the power grid is normal. The current command for grid-type energy storage is determined by the first parameter and the second parameter, and the output power of the grid-type energy storage is adjusted according to the current command.

2. The grid-type energy storage output power regulation method according to claim 1, characterized in that, Before determining the active and reactive power outputs of the grid-type energy storage based on the average active and average reactive power outputs and a preset power allocation coefficient, the process also includes... Determine if an asymmetrical fault has occurred in the power grid; If no asymmetrical fault occurs in the power grid, the operation of determining the active and reactive power output of the grid-type energy storage based on the average active power and average reactive power output of the grid-type energy storage and the preset power allocation coefficient is prohibited. If an asymmetrical fault occurs in the power grid and the grid-connected current imbalance is less than or equal to the target value, the operation of determining the active and reactive power output of the grid-connected energy storage based on the average active power and average reactive power output of the grid-connected energy storage and the preset power allocation coefficient is prohibited. If an asymmetrical fault occurs in the power grid and the grid-connected current imbalance is greater than the target value, the operation of determining the active and reactive power outputs of the grid-connected energy storage based on the average active power and average reactive power output of the grid-connected energy storage and the preset power allocation coefficient is triggered.

3. The grid-type energy storage output power regulation method according to claim 1, characterized in that, The active and reactive power outputs of the grid-type energy storage are determined based on the average active and average reactive power outputs and a preset power allocation coefficient, including: The active and reactive power outputs of the grid-type energy storage are determined by the output determination formula based on the average active and average reactive power outputs and a preset power allocation coefficient. The output determination formula is as follows: ； in, and These are the positive-sequence active power output and negative-sequence active power output of grid-type energy storage, respectively. and These represent the positive-sequence reactive power output and negative-sequence reactive power output of grid-type energy storage, respectively; P and Q represent the average active power and average reactive power output of grid-type energy storage, respectively. The preset active power allocation coefficient; This is the preset reactive power allocation coefficient.

4. The grid-type energy storage output power regulation method according to claim 1, characterized in that, The first expression is: ； in, The active power fluctuation amplitude; and These represent the positive-sequence and negative-sequence output voltage amplitudes at the grid-connected port of the grid-connected energy storage system, respectively; P and Q represent the average active power and average reactive power output of the grid-connected energy storage system, respectively. The preset active power allocation coefficient; This is the first expression for the active power fluctuation amplitude; The second expression is: ； in, This is the first maximum phase current output by grid-type energy storage after a grid fault. The angular frequency of the grid-type energy storage output; This is the equivalent impedance of the power grid; and These represent the positive-sequence voltage amplitude and the negative-sequence voltage amplitude of the power grid, respectively; P and Q represent the average active power and average reactive power output of the grid-connected energy storage, respectively. The preset reactive power allocation coefficient; This is the second expression for the first maximum phase current.

5. The grid-type energy storage output power regulation method according to claim 4, characterized in that, The determination of the reactive power safety zone based on the second maximum phase current, the maximum active power fluctuation amplitude, the first expression, and the second expression includes: Set a first constraint condition; the first constraint condition is to set the positive sequence active power output, negative sequence active power output, average active power output of grid-type energy storage, and preset active power allocation coefficient to 0. Based on the first constraint, a first inequality is constructed using the maximum active power fluctuation amplitude and the first expression; the first inequality is: ； in, This refers to the maximum active power fluctuation amplitude; Based on the first constraint, a second inequality is constructed using the second maximum phase current and the second expression; the second inequality is: ； in, This is the second maximum phase current; Solve the first inequality and the second inequality, and determine the corresponding solution as the value range of the reactive power safety zone.

6. The grid-type energy storage output power regulation method according to claim 5, characterized in that, The step of determining the active power safety zone using the first parameter corresponding to the reactive power safety zone, and determining the second parameter based on the active power safety zone, includes: The first parameter is determined based on the value range corresponding to the reactive power safety zone; Set a second constraint condition; the second constraint condition is to set the values ​​of the average reactive power and the preset reactive power allocation coefficient in the first expression and the second expression to the reactive power and reactive power allocation coefficient in the first parameter, respectively; Based on the second constraint and the constraints that the active power fluctuation amplitude is less than the maximum active power fluctuation amplitude and the first maximum phase current is less than the second maximum phase current, the first inequality and the second inequality are solved, and the corresponding solutions are determined as the value range corresponding to the active power safety zone. The second parameter is determined by the value range corresponding to the active power safety zone and the maximum active power output of the grid-type energy storage. Alternatively, the second parameter can be determined based on the target active power output and the minimum value of the maximum phase current of the grid-type energy storage, using the value range corresponding to the active power safety zone. Alternatively, the second parameter can be determined based on the target active power output and the minimum active power fluctuation amplitude of the grid-type energy storage, using the value range corresponding to the active power safety zone.

7. The method for regulating the output power of grid-type energy storage according to any one of claims 1 to 6, characterized in that, The determination of the current command for grid-type energy storage through the first parameter and the second parameter includes: The positive-sequence active power output, negative-sequence active power output, positive-sequence reactive power output, and negative-sequence reactive power output of the grid-type energy storage are determined by the first parameter and the second parameter. The current command for the grid-type energy storage is determined by the target relationship between the current command and the active and reactive power outputs; the target relationship is: ； in, and These are the positive-sequence active power output and negative-sequence active power output of grid-type energy storage, respectively. and These are the positive-sequence reactive power output and negative-sequence reactive power output of grid-type energy storage, respectively. The angular frequency of the grid-type energy storage output; This is the equivalent impedance of the power grid; and These are the positive sequence voltages of the grid voltage along the d-axis and q-axis in the dq coordinate system, respectively. and These are the negative sequence voltages of the grid voltage along the d-axis and q-axis in the dq coordinate system, respectively. and These are the d-axis positive sequence current and q-axis positive sequence current of the grid-type energy storage in the dq coordinate system, respectively. and These are the d-axis negative sequence current and q-axis negative sequence current of the grid-type energy storage in the dq coordinate system, respectively. The current commands include positive sequence d-axis current commands, positive sequence q-axis current commands, negative sequence d-axis current commands, and negative sequence q-axis current commands.

8. A grid-type energy storage output power regulation device, characterized in that, include: The output determination module is used to determine the active power output and reactive power output of the grid-type energy storage based on the average active power and average reactive power output and the preset power allocation coefficient; the active power output includes positive sequence active power output and negative sequence active power output; the reactive power output includes positive sequence reactive power output and negative sequence reactive power output. The expression determination module is used to determine a first expression for the active power fluctuation amplitude based on the grid-connected topology of the grid-type energy storage, the active power output, and the reactive power output, and to determine a second expression for the first maximum phase current output by the grid-type energy storage after a grid fault based on the active power output and the reactive power output. The safe zone and parameter determination module is used to determine the reactive power safe zone based on the second maximum phase current, the maximum active power fluctuation amplitude, the first expression, and the second expression; determine the active power safe zone through the first parameter corresponding to the reactive power safe zone; and determine the second parameter based on the active power safe zone. The first parameter includes reactive power and reactive power allocation coefficient; the second parameter includes active power and active power allocation coefficient; the second maximum phase current is the maximum phase current that the grid-type energy storage is allowed to output when the power grid is normal. The output power regulation module is used to determine the current command of the grid-type energy storage through the first parameter and the second parameter, and regulate the output power of the grid-type energy storage according to the current command.

9. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor for executing a computer program to implement the grid-type energy storage output power regulation method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, A computer program is stored on a computer-readable storage medium, and when executed by a processor, the computer program implements the grid-type energy storage output power regulation method as described in any one of claims 1 to 7.

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