Power distribution method, system and equipment for energy storage power station, and storage medium

Abstract

The invention discloses an energy storage power station power distribution method, system and device, and a storage medium, and the method comprises the steps: judging a charging and discharging direction based on an active adjustment instruction, and sorting energy storage units in combination with the real-time charge states of the energy storage units; obtaining an energy storage adjustment sensitive parameter; based on the active adjustment instruction and the energy storage adjustment sensitive parameter, calculating an active distribution target value of the energy storage unit by using an inverse proportion method, and performing power distribution according to the sorting of the energy storage unit; based on the charging and discharging direction, the energy storage units are reordered, and the energy storage unit active distribution target value exceeding the maximum power or smaller than the energy storage unit active adjustment dead zone is distributed.

Description

Technical Field

[0001] This invention relates to the field of electrochemical energy storage control technology, specifically to power distribution methods, systems, equipment, and storage media for energy storage power stations. Background Technology

[0002] The Energy Management System (EMS) is a core component for controlling the allocation of energy storage units. Its functions include receiving charging and discharging commands from the grid or operators and distributing power target values ​​to the converters (PCS) of each energy storage unit according to a certain allocation strategy.

[0003] In grid-side or power-side energy storage, existing EMS systems generally employ an average distribution strategy as their control strategy. This method evenly distributes the target active power value to all available units. While the average distribution strategy is simple in structure and can shorten the adjustment time, as the operating time of the energy storage power station increases, due to differences in the manufacturing processes and technologies of each energy storage unit, an imbalance in the state of charge (SOC) inevitably occurs among the battery cells. This SOC imbalance leads to a series of problems: First, it easily leads to a decrease in the lifespan of energy storage units, as overcharging and discharging of some batteries accelerates the aging of the energy storage units, thus shortening the service life of the energy storage power station; second, it weakens the active power support capability of the energy storage power station, making it impossible for the power system to adjust power as expected, and reducing the accuracy of responding to grid regulation demands; furthermore, SOC imbalance also affects the safety and economy of the power system, potentially inducing thermal runaway risks and leading to a reduction in available power system capacity and an increase in operation and maintenance costs. Therefore, researching optimized control strategies that consider the battery SOC balance state is crucial for improving the operating efficiency and reliability of large-scale energy storage power stations. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a power allocation method, system, device, and storage medium for energy storage power stations capable of optimizing SOC balancing speed.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] The power allocation method for energy storage power stations of the present invention includes:

[0007] The charging and discharging direction is determined based on the active power regulation command, and the energy storage units are sorted in the first sorting based on the real-time state of charge of the energy storage units.

[0008] Obtain energy storage regulation sensitivity parameters;

[0009] Based on the active power regulation command and the energy storage regulation sensitivity parameter, the active power allocation target value of the energy storage unit is calculated using the inverse proportional method, and the power is allocated according to the order of the first sorting of the energy storage units, so that the power of each energy storage unit after the power allocation is the corresponding active power allocation target value of the energy storage unit.

[0010] Based on the charging and discharging direction, the energy storage units are reordered, and active power allocation target values ​​are assigned to energy storage units that exceed the maximum power generation capacity or are less than the active power regulation dead zone of the energy storage units.

[0011] A further improvement of this invention lies in: determining the charging and discharging direction based on active power regulation commands, and performing a first sorting of energy storage units in conjunction with the real-time state of charge of the energy storage units, specifically including:

[0012] Remove non-operating, faulty, or maintenance-inspected energy storage units;

[0013] Based on the active power target value P of the energy storage power station G Determine whether the active power regulation command is charging or discharging;

[0014] All energy storage units are sorted according to whether they are charging or discharging: when the active power regulation command is charging, the energy storage units are sorted from smallest to largest according to their current SOC value; when the active power regulation command is discharging, the energy storage units are sorted from largest to smallest according to their current SOC value.

[0015] A further improvement of this invention is that the energy storage regulation sensitivity parameter is pre-configured or calculated, and the calculation expression for the energy storage regulation sensitivity parameter is:

[0016] α∝f(N,ΔP)

[0017] In the formula, N is the average number of charge-discharge cycles of the energy storage power station, and ΔP is the difference between the target active power value of the energy storage power station and the current real-time active power.

[0018] A further improvement of this invention lies in the following: the expression for calculating the active power allocation target value of the energy storage unit using the inverse proportional method is as follows:

[0019]

[0020] In the formula, x is the energy storage unit number, and n is the total number of adjustable energy storage units in the energy storage power station. Assign target values ​​for active power to energy storage units, SOC x Real-time SOC percentage of the energy storage unit. This represents the average real-time SOC percentage of the adjustable energy storage units in the energy storage power station.

[0021] A further improvement of the present invention lies in: reordering the energy storage units based on the charging and discharging direction, and allocating active power allocation target values ​​to energy storage units that exceed the maximum generateable power or are less than the active power regulation dead zone of the energy storage units, specifically including:

[0022] Based on the charging and discharging direction, the energy storage units are sorted a second time, and the order of the second sorting is the reverse of the order of the first sorting.

[0023] Following the second sorting order, sequentially determine whether the active power allocation target value of each energy storage unit is less than the active power adjustment dead zone, until the first energy storage unit that does not meet the requirement of having an active power allocation target value less than the active power adjustment dead zone is encountered, at which point the determination operation stops. Specifically, if the active power allocation target value of an energy storage unit is lower than the active power adjustment dead zone, then the active power allocation target value of the corresponding energy storage unit is compared with the existing active power allocation residual value f′. val The sums are used to obtain the current active power allocation residual value f. val And set the target value for the active power allocation of the corresponding energy storage unit to 0:

[0024]

[0025] In the formula, The active power regulation dead zone of the xth energy storage unit;

[0026] The residual value f of the active power allocation val The first energy storage unit that does not meet the active power allocation target value is less than the active power regulation dead zone of the energy storage unit, and the active power allocation residual value f is cleared. val ;

[0027] Based on the charging and discharging direction, the energy storage units are sorted a third time, and the order of the third sorting is the reverse of the order of the second sorting.

[0028] Following the third sorting order, each energy storage unit is sequentially checked to see if its active power allocation target value is greater than its maximum generating power, until the first energy storage unit that does not meet the requirement of its active power allocation target value being greater than its maximum generating power is found. At this point, the checking operation stops. If the active power allocation target value of an energy storage unit is greater than its maximum generating power, the portion of the active power allocation target value exceeding the maximum generating power is added to the existing active power allocation residual value f′. val The sums are used to obtain the current active power allocation residual value f. val And set the corresponding active power allocation target value for the energy storage unit to the maximum generateable power:

[0029]

[0030] In the formula, Let x be the maximum power output of the xth energy storage unit;

[0031] Following the third sorting order, starting with the first energy storage unit that does not meet the active power allocation target value exceeding the maximum generateable power, power allocation is performed sequentially until the active power allocation residual value f is cleared. val The power allocation satisfies the following:

[0032] When the energy storage unit is allocated the active power allocation target value Compared with the current active power allocation residual value f val The sum of these values ​​is greater than the maximum power output of the energy storage unit. When the energy storage unit is allocated, the active power allocation target value of the energy storage unit will be determined. Set the maximum generating power and subtract the corresponding allocated value from the active power allocation residual value to obtain the remaining active power allocation residual value f″. val :

[0033]

[0034] The energy storage power station power distribution system of the present invention includes:

[0035] The energy storage unit sorting module is used to determine the charging and discharging direction based on the active power regulation command, and to sort the energy storage units for the first time in combination with the real-time state of charge of the energy storage units.

[0036] The parameter acquisition module is used to acquire energy storage regulation sensitivity parameters;

[0037] The first power allocation module is used to calculate the active power allocation target value of the energy storage unit based on the active power regulation command and the energy storage regulation sensitivity parameter using the inverse proportional method, and to allocate power according to the order of the first sorting of the energy storage units, so that the power of each energy storage unit after power allocation is the corresponding active power allocation target value of the energy storage unit.

[0038] The power reallocation module is used to reorder the energy storage units based on the charging and discharging direction, and allocate the active power allocation target value of the energy storage units that exceeds the maximum power generation or is less than the active power regulation dead zone of the energy storage units.

[0039] The verification module is used to verify the active power allocation target values ​​of all energy storage units. Is it consistent with the active power target value P of the energy storage power station? G .

[0040] The electronic device of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the above-described power distribution method for energy storage power stations.

[0041] The present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described power allocation method for an energy storage power station.

[0042] The present invention provides a computer program product, which includes computer instructions that, when executed by a processor, perform the above-described power allocation method for energy storage power stations.

[0043] The beneficial effects of this invention are as follows: By introducing an inverse proportional active power allocation strategy and a sensitivity coefficient, this invention actively tracks the SOC value of each energy storage unit and dynamically adjusts the real-time active power target value of each energy storage unit, maintaining the active power support capability of the entire energy storage power station under long-term operation conditions. While ensuring the active power response capability of the entire energy storage power station, this invention actively balances the SOC of each energy storage unit, improving the uniformity of power generation and the operational stability of the energy storage power station, providing a new steady-state control technology for large-capacity clustered energy storage power stations. Attached Figure Description

[0044] Figure 1 This is a flowchart of the method in an embodiment of the present invention;

[0045] Figure 2 This is a partial flowchart of the power allocation process performed by the power allocation system of the energy storage power station in an embodiment of the present invention;

[0046] Figure 3 This is a partial flowchart of the power distribution system of the energy storage power station performing power distribution under discharge conditions in an embodiment of the present invention;

[0047] Figure 4 This is a partial flowchart of the power distribution system of the energy storage power station in the present invention performing power distribution during charging.

[0048] Figure 5 This is a partial flowchart of the second power allocation process performed by the power distribution system of the energy storage power station in an embodiment of the present invention;

[0049] Figure 6 This is another part of the flowchart of the second power allocation performed by the power distribution system of the energy storage power station in this embodiment of the invention;

[0050] Figure 7 This is a schematic diagram illustrating the effect of the second power allocation in the power distribution system of the energy storage power station in this embodiment of the invention;

[0051] Figure 8 This is a schematic diagram of an electrochemical energy storage power station in an embodiment of the present invention. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0053] like Figure 1 As shown in this embodiment, the power allocation method for energy storage power stations that can achieve active SOC balancing includes:

[0054] Step 1: Determine the charging and discharging direction based on the active power regulation command, and sort the energy storage units for the first time in combination with the real-time state of charge of the energy storage units;

[0055] Step 2: Obtain the energy storage regulation sensitivity parameters;

[0056] Step 3: Based on the active power regulation command and the energy storage regulation sensitivity parameter, calculate the active power allocation target value of the energy storage unit using the inverse proportional method, and perform power allocation according to the order of the first sorting of the energy storage units, so that the power of each energy storage unit after power allocation is the corresponding active power allocation target value of the energy storage unit.

[0057] Step 4: Based on the charging and discharging direction, reorder the energy storage units and allocate active power allocation target values ​​to energy storage units that exceed the maximum power generation capacity or are less than the active power regulation dead zone of the energy storage unit.

[0058] The above method steps are implemented based on the energy storage power station power distribution system in this embodiment, which includes:

[0059] The energy storage unit sorting module is used to determine the charging and discharging direction based on the active power regulation command, and to sort the energy storage units for the first time in combination with the real-time state of charge of the energy storage units.

[0060] The parameter acquisition module is used to acquire energy storage regulation sensitivity parameters;

[0061] The first power allocation module is used to calculate the active power allocation target value of the energy storage unit based on the active power regulation command and the energy storage regulation sensitivity parameter using the inverse proportional method, and to allocate power according to the order of the first sorting of the energy storage units, so that the power of each energy storage unit after power allocation is the corresponding active power allocation target value of the energy storage unit.

[0062] The power reallocation module is used to reorder the energy storage units based on the charging and discharging direction, and allocate the active power allocation target value of the energy storage units that exceeds the maximum power generation or is less than the active power regulation dead zone of the energy storage units.

[0063] The verification module is used to verify the active power allocation target values ​​of all energy storage units. Is it consistent with the active power target value P of the energy storage power station? G .

[0064] like Figure 2 As shown, the operations performed by the energy storage unit sorting module include: removing energy storage units that are not in operation, are faulty, or under maintenance; and sorting them according to the active power target value P of the energy storage power station. G Determine whether the active power regulation command is charging or discharging; sort all energy storage units according to whether they are charging or discharging: When the active power regulation command is charging, the energy storage units are sorted from smallest to largest according to their current SOC value; when the active power regulation command is discharging, the energy storage units are sorted from largest to smallest according to their current SOC value. During charging, the energy storage unit with the larger SOC value corresponds to the active power allocation target value. The smaller the value, the larger the SOC value during discharge, corresponding to the active power allocation target value of the energy storage unit. The larger it is. Based on the active power target value P of the energy storage power station. G The criterion for determining whether an active power regulation command is for charging or discharging is: P G When the active power regulation dead zone of the energy storage power station is less than that of the energy storage station, it is charging; P G Discharge occurs when the active power regulation dead zone of the energy storage power station is greater than that of the power storage station. G It remains stationary when it is in the lower dead zone of the active power regulation of the energy storage power station or the upper dead zone of the active power regulation of the energy storage power station.

[0065] The energy storage regulation sensitivity parameter α can be automatically calculated based on the difference between the current number of charge-discharge cycles of the energy storage power station and the active power target, or it can be set manually. As a parameter controlling the speed of active power regulation, the energy storage regulation sensitivity parameter α is calculated only once when the EMS system receives an active power regulation command, and is recalculated only after the EMS system receives the next active power regulation command. The energy storage regulation sensitivity parameter α is directly proportional to the average number of charge-discharge cycles of the energy storage power station and inversely proportional to the difference between the current active power target and the target value. The calculation expression is:

[0066] α∝f(N,ΔP)

[0067] In the formula, N is the average number of charge-discharge cycles of the energy storage power station, and ΔP is the difference between the target active power value of the energy storage power station and the current real-time active power.

[0068] When the parameter acquisition module is set to automatically calculate the energy storage regulation sensitivity parameter α, the calculated range of the energy storage regulation sensitivity parameter α is (-1, 2).

[0069] The energy storage regulation sensitivity parameter α can change the active power distribution target value of the energy storage unit. The degree of dispersion in the allocation. The larger the energy storage regulation sensitivity parameter α, the higher the target value of active power allocation for the energy storage unit. The more discrete the data, the more important it is to prevent... The values ​​are too discrete, so the energy storage regulation sensitivity parameter α is manually set to [-1, 2]. Setting α = -1 indicates a switch from the method of this invention to an average distribution strategy, i.e.

[0070] In this embodiment, the expression for calculating the active power allocation target value of the energy storage unit using the inverse proportional method is as follows:

[0071]

[0072] In the formula, x is the energy storage unit number, and n is the total number of adjustable energy storage units in the energy storage power station. Assign target values ​​for active power to energy storage units, SOC x Real-time SOC percentage of the energy storage unit. This represents the average real-time SOC percentage of the adjustable energy storage units in the energy storage power station.

[0073] like Figure 3 and Figure 4 As shown, after the first power allocation module performs power allocation, the power reallocation module reorders the energy storage units based on the charging and discharging direction, i.e., a second sorting, which is the reverse of the first sorting order. Following the second sorting order, it sequentially checks whether the active power allocation target value of each energy storage unit is less than the active power regulation dead zone, until the first energy storage unit that does not meet the requirement of having an active power allocation target value less than the active power regulation dead zone is found, at which point the judgment operation stops. Specifically, if the active power allocation target value of an energy storage unit is lower than the active power regulation dead zone, the corresponding energy storage unit's active power allocation target value is compared with the existing active power allocation residual value f′. val The sums are used to obtain the current active power allocation residual value f. val And set the target value for the active power allocation of the corresponding energy storage unit to 0:

[0074]

[0075] In the formula, This is the active power regulation dead zone for the xth energy storage unit.

[0076] The residual value f of the active power allocation val The first energy storage unit that does not meet the active power allocation target value is less than the active power regulation dead zone of the energy storage unit, and the active power allocation residual value f is cleared. val :

[0077]

[0078] f val =0

[0079] In the formula, The active power allocation target value is assigned to the energy storage unit before it is allocated.

[0080] After the allocation is completed, the energy storage units are re-sorted according to the charging and discharging direction based on their SOC value. This is the third sorting, and the order is the opposite of the second sorting.

[0081] like Figure 5 , Figure 6 As shown, following the third sorting order, the active power allocation target value of each energy storage unit is sequentially checked to see if it is greater than the maximum power generation capacity, until the first energy storage unit that does not meet the requirement of having an active power allocation target value greater than the maximum power generation capacity is found. At this point, the checking operation stops. If the active power allocation target value of an energy storage unit is greater than the maximum power generation capacity, the portion of the active power allocation target value exceeding the maximum power generation capacity is added to the existing active power allocation residual value f′. val The sums are used to obtain the current active power allocation residual value f. val And set the corresponding active power allocation target value for the energy storage unit to the maximum generateable power:

[0082]

[0083] In the formula, Let x be the maximum power output of the xth energy storage unit;

[0084] Following the third sorting order, starting with the first energy storage unit that does not meet the active power allocation target value exceeding the maximum generateable power, power allocation is performed sequentially until f... val The value is 0, and the allocation ends. The residual value f of the active power allocation. val The allocation follows the principle of: the active power allocation target value of the energy storage unit being allocated. Compared with the current active power allocation residual value f val The sum of these values ​​is greater than the maximum power output of the energy storage unit. When the energy storage unit is allocated, the active power allocation target value of the energy storage unit will be determined. Set the maximum generating power and subtract the corresponding allocated value from the active power allocation residual value to obtain the remaining active power allocation residual value f″. val :

[0085]

[0086] The active power allocation target value of the energy storage units to be allocated With the remaining active power allocation residual value f″ val The sum of these values ​​is less than or equal to the maximum power output of the energy storage unit. When that happens, the remaining active power residual value f″ will be allocated. val All resources are allocated to the energy storage units to be allocated, and the residual value f of active power allocation is cleared. valAt this point, the target value for active power allocation of the energy storage unit is:

[0087]

[0088] f val =0

[0089] The verification module verifies the active power allocation target value of all energy storage units after power allocation. Whether the sum is related to the active power target value P of the energy storage power station G If the values ​​are the same, the allocation ends, and the corresponding active power allocation target value for each energy storage unit is issued to each energy storage unit. If they are not the same, an error will be reported and allocation will stop. The condition for ending allocation is: The effect of the second power distribution is as follows Figure 7 As shown.

[0090] In this embodiment, to verify the beneficial effects of the present invention, scientific demonstration is conducted through economic benefit calculations and simulation experiments. This embodiment presents experiments comparing both existing conventional methods and the method of this embodiment.

[0091] Combination Figure 8 As shown, 10 energy storage unit models were imported into the simulation software, the unit parameters of the energy storage units were set, the initial SOC of each energy storage unit was set, and active power target instructions were issued. Active power adjustment instructions were issued to the energy storage units according to the average allocation strategy and the method of this invention. The calculation cycle was 1 time / minute. After running for 30 minutes, the SOC value of each energy storage unit was recorded and the standard deviation was calculated. The data is shown in Table 1.

[0092] Table 1 Data Presentation Table

[0093]

[0094]

[0095] As shown in Table 1, when there are differences in the initial SOC of the energy storage units within the station, the average distribution strategy does not reduce the standard deviation of the SOC among the energy storage units. Furthermore, with the operational errors generated during the unit's operation, the standard deviation continues to increase, leading to a decrease in the uniformity of the station's power output and even causing some energy storage units to overcharge or over-discharge, reducing their operational lifespan and affecting the overall station's active power output. The method of this invention (SOC balancing method) can effectively reduce the standard deviation among energy storage units, and it continuously adjusts the active power output of each unit as the EMS system operates to approach a balanced SOC state.

[0096] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0097] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power allocation method for energy storage power stations, characterized in that: include: The charging and discharging direction is determined based on the active power regulation command, and the energy storage units are sorted in the first sorting based on the real-time state of charge of the energy storage units. Obtain energy storage regulation sensitivity parameters; Based on the active power regulation command and the energy storage regulation sensitivity parameter, the active power allocation target value of the energy storage unit is calculated using the inverse proportional method, and the power is allocated according to the order of the first sorting of the energy storage units, so that the power of each energy storage unit after the power allocation is the corresponding active power allocation target value of the energy storage unit. Based on the charging and discharging direction, the energy storage units are reordered, and active power allocation target values ​​are assigned to energy storage units that exceed the maximum power generation capacity or are less than the active power regulation dead zone of the energy storage units.

2. The power allocation method for an energy storage power station according to claim 1, characterized in that: The charging and discharging direction is determined based on the active power regulation command, and the energy storage units are sorted in the first order based on the real-time state of charge of the energy storage units. Specifically, this includes: Remove non-operating, faulty, or maintenance-inspected energy storage units; Based on the active power target value P of the energy storage power station G Determine whether the active power regulation command is charging or discharging; All energy storage units are sorted according to whether they are charging or discharging: when the active power regulation command is charging, the energy storage units are sorted from smallest to largest according to their current SOC value; when the active power regulation command is discharging, the energy storage units are sorted from largest to smallest according to their current SOC value.

3. The power allocation method for an energy storage power station according to claim 1, characterized in that: The energy storage regulation sensitivity parameter is pre-configured or calculated, and the calculation expression for the energy storage regulation sensitivity parameter is: α∝f(N,ΔP) In the formula, N is the average number of charge-discharge cycles of the energy storage power station, and ΔP is the difference between the target active power value of the energy storage power station and the current real-time active power.

4. The power allocation method for an energy storage power station according to claim 1, characterized in that: The expression for calculating the active power allocation target value of an energy storage unit using the inverse proportional method is as follows: In the formula, x is the energy storage unit number, and n is the total number of adjustable energy storage units in the energy storage power station. Assign target values ​​for active power to energy storage units, SOC x Real-time SOC percentage of the energy storage unit. This represents the average real-time SOC percentage of the adjustable energy storage units in the energy storage power station.

5. The power allocation method for an energy storage power station according to claim 1, characterized in that: Based on the charging and discharging direction, the energy storage units are reordered, and active power allocation target values ​​are assigned to energy storage units that exceed their maximum generating power or are below their active power regulation dead zone. Specifically, this includes: Based on the charging and discharging direction, the energy storage units are sorted a second time, and the order of the second sorting is the reverse of the order of the first sorting. Following the second sorting order, sequentially determine whether the active power allocation target value of each energy storage unit is less than the active power adjustment dead zone, until the first energy storage unit that does not meet the requirement of having an active power allocation target value less than the active power adjustment dead zone is encountered, at which point the determination operation stops. Specifically, if the active power allocation target value of an energy storage unit is lower than the active power adjustment dead zone, then the active power allocation target value of the corresponding energy storage unit is compared with the existing active power allocation residual value f′. val The sum is used to obtain the current active power allocation residual value f. val And set the target value for the active power allocation of the corresponding energy storage unit to 0: In the formula, The active power regulation dead zone of the xth energy storage unit; The residual value f of the active power allocation val The first energy storage unit that does not meet the active power allocation target value is less than the active power regulation dead zone of the energy storage unit, and the active power allocation residual value f is cleared. val ; Based on the charging and discharging direction, the energy storage units are sorted a third time, and the order of the third sorting is the reverse of the order of the second sorting. Following the third sorting order, each energy storage unit is sequentially checked to see if its active power allocation target value is greater than its maximum generating power, until the first energy storage unit that does not meet the requirement of its active power allocation target value being greater than its maximum generating power is found. At this point, the checking operation stops. If the active power allocation target value of an energy storage unit is greater than its maximum generating power, the portion of the active power allocation target value exceeding the maximum generating power is added to the existing active power allocation residual value f′. val The sum is used to obtain the current active power allocation residual value f. val And set the corresponding active power allocation target value for the energy storage unit to the maximum generateable power: In the formula, Let x be the maximum power output of the xth energy storage unit; Following the third sorting order, starting with the first energy storage unit that does not meet the active power allocation target value exceeding the maximum generateable power, power allocation is performed sequentially until the active power allocation residual value f is cleared. val The power allocation satisfies the following: When the energy storage unit is allocated the active power allocation target value Compared with the current active power allocation residual value f val The sum of these values ​​is greater than the maximum power output of the energy storage unit. When the energy storage unit is allocated, the active power allocation target value of the energy storage unit will be determined. Set the maximum generating power and subtract the corresponding allocated value from the active power allocation residual value to obtain the remaining active power allocation residual value f″. val :

6. A power distribution system for an energy storage power station based on the method of any one of claims 1 to 5, characterized in that: include: The energy storage unit sorting module is used to determine the charging and discharging direction based on the active power regulation command, and to sort the energy storage units in the first order based on the real-time state of charge of the energy storage units. The parameter acquisition module is used to acquire energy storage regulation sensitivity parameters; The first power allocation module is used to calculate the active power allocation target value of the energy storage unit based on the active power regulation command and the energy storage regulation sensitivity parameter using the inverse proportional method, and to allocate power according to the order of the first sorting of the energy storage units, so that the power of each energy storage unit after power allocation is the corresponding active power allocation target value of the energy storage unit; the power redistribution module is used to reorder the energy storage units based on the charging and discharging direction, and allocate the active power allocation target value of the energy storage units that exceeds the maximum power generation or is less than the active power regulation dead zone of the energy storage unit. The verification module is used to verify the active power allocation target values ​​of all energy storage units. Is it consistent with the active power target value P of the energy storage power station? G .

7. 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, it implements the steps of the power allocation method for an energy storage power station as described in any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, it implements the steps of the power allocation method for the energy storage power station as described in any one of claims 1 to 5.

9. A computer program product comprising computer instructions, characterized in that, When the computer instructions are executed by the processor, the power allocation method for the energy storage power station according to any one of claims 1 to 5 is performed.

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