Energy storage active power control method for managing multi-node voltage out-of-limit on feeder line and terminal equipment thereof

Abstract

The invention relates to an energy storage active power control method for governing voltage out-of-limit of multiple nodes on a feeder line and terminal equipment thereof. The method comprises the following steps: firstly, selecting a proper current governing node and a current adjusting node; according to the positions of the two nodes and the voltage and the out-of-limit value of the current governance node, active power which should be provided by energy storage of the current regulation node is determined; calculating the energy storage output upper and lower limits of the current adjusting node, determining whether the energy storage of the current adjusting node meets the requirement by combining the previously determined data, and determining the energy storage active power of the current adjusting node under the condition that the requirement is met; and finally, on the premise, calculating the voltage of each node to obtain the updated voltage of each node. Judging whether out-of-limit voltage still exists on the feeder line or not; if yes, returning for re-treatment; and if not, controlling each energy storage output according to the energy storage active power calculated in each cycle. According to the method, effective treatment of multi-node voltage out-of-limit is realized by controlling the active power output of each energy storage on the feeder line.

Description

Technical Field

[0001] This invention relates to the field of energy storage control, and in particular to a method for controlling the active power of energy storage and its terminal equipment for addressing voltage overruns at multiple nodes on feeders. Background Technology

[0002] With the increasing penetration of distributed power sources (such as photovoltaic and wind power) in the distribution network, and the diversification and volatility of user-side electricity load, the operating characteristics of distribution network feeders have changed significantly, and traditional voltage regulation methods are no longer able to meet the needs of multi-node voltage regulation.

[0003] In recent years, energy storage systems (such as lithium battery energy storage and vanadium redox flow storage) have gradually become a new means of voltage regulation in power distribution networks due to their characteristics of rapid charging and discharging and bidirectional power regulation. Currently, some technologies are attempting to utilize the reactive power control function of energy storage systems to regulate feeder node voltage. For example, reactive power can be output through energy storage converters (PCS) to compensate for reactive power deficits or absorb excess reactive power in the feeder, thereby stabilizing the node voltage.

[0004] However, existing voltage regulation methods based on reactive power of energy storage have obvious drawbacks: on the one hand, the reactive power regulation capability of energy storage systems is limited by their rated capacity and the voltage level at the connection point. When the voltage deviation of multiple nodes in the feeder is large or the output of distributed power sources fluctuates drastically, relying solely on reactive power regulation often fails to achieve the ideal voltage control effect. On the other hand, the voltage characteristics of different nodes along the feeder are different (for example, the voltage of nodes near the substation is more affected by the power grid, while the voltage of nodes far from the substation is more affected by distributed power sources and loads). A single reactive power regulation strategy cannot accurately control the differentiated voltage regulation needs of multiple nodes, and it is easy for the voltage of some nodes to still exceed the limit.

[0005] Furthermore, existing technologies rarely utilize the active power control function of energy storage systems to participate in multi-node voltage regulation of feeders. In reality, the active power charging and discharging of energy storage systems can alter the power flow distribution in the feeder, thereby affecting the voltage levels of each node along the line. For example, when the voltage of downstream nodes in the feeder is too high, the energy storage system can absorb active power to reduce the power transmitted from distributed generation sources to the grid, lowering the line voltage drop and thus reducing the voltage of downstream nodes. Conversely, when the voltage of upstream nodes in the feeder is too low, the energy storage system can release active power to supplement load demand, reduce the power loss transmitted from the grid to the feeder, and increase the voltage of upstream nodes.

[0006] However, there is currently a lack of mature energy storage active power control methods that can dynamically adjust the energy storage active power output based on the real-time voltage status of multiple nodes in the feeder, and achieve coordinated management of voltage over-limit at multiple nodes. This has become a key bottleneck restricting the energy storage system from playing a greater role in distribution network voltage regulation. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a method for controlling the active power of energy storage to mitigate voltage exceedance at multiple nodes on a feeder, comprising: S1: Obtain the location, rated power, and rated voltage of each energy storage access node on the feeder; and collect the voltage of each node on the feeder; then run a loop count. ; S2: Determine if there is an over-limit voltage on the feeder; if not, return to step S1; if yes, proceed to step S3. S3: Calculate the voltage over-limit value of each node and select the node with the largest absolute value of over-limit as the current governance node; S4: Based on the location of each energy storage access node and the current governance node, calculate the voltage sensitivity of the active power change of each energy storage access node on the feeder to the current governance node. S5: Select the energy storage access node with the highest voltage sensitivity as the current regulation node; S6: Based on the location of the current governance node and the current regulation node, as well as the voltage and over-limit value of the current governance node, calculate the active power that the energy storage of the current regulation node should provide; S7: Calculate the upper and lower limits of the active power output of the energy storage of the current regulating node, and determine whether the energy storage of the current regulating node meets the requirements based on the active power that the energy storage of the current regulating node should provide; if not, remove the current regulating node, return to step S5, and reselect the current regulating node; if yes, determine the active power of the energy storage of the current regulating node. S8: Calculate the voltage of each node based on the current energy storage active power of the regulating node, and obtain the updated voltage of each node. S9: Based on the updated voltage at each node and the rated voltage of the feeder, determine whether there is still an over-limit voltage on the feeder; if so, then perform a cyclic count. Add 1 and return to step S3; otherwise, control the output of each energy storage unit based on the active power of the energy storage calculated in each cycle.

[0008] Furthermore, in step S3, the over-limit value of the voltage at each node is calculated using formula (1): (1) In the formula, This is the rated voltage of the feeder. , These represent the upper and lower voltage limits that are allowed to operate on the feeder, respectively. For time t, the first The voltage at node i is calculated in the next iteration; For time t, the first The over-limit value of node i in the next iteration.

[0009] Furthermore, in step S4, the voltage sensitivity is calculated using formula (2): (2) In the formula, This represents the voltage change at the current governance node i caused by the change in unit active power at each energy storage access node. Indicates the rated voltage of the feeder; Indicates the first Each energy storage node; This represents the resistance between feeder node n and node n+1.

[0010] Furthermore, in step S6, formula (3) is used to construct an energy storage active power voltage regulation model and calculate the current regulation node. The active power that the energy storage should provide is: (3) In the formula, Represents the time t. In the next iteration of the calculation, the current governance node is... Change the limit value At that time, the current adjustment node The active power that the energy storage should provide; Indicates the location of the current adjustment node Or the current adjustment node Upstream node cluster, Indicates the location of the current adjustment node Downstream node clusters.

[0011] Furthermore, in step S7, the upper and lower limits of the active power output of the current regulating node are calculated using formulas (4) and (5): (4) (5) In the formula, , They represent the time t, respectively. The upper and lower limits of the active power output of the energy storage of the current adjustment node in the next cycle calculation; Indicates the first The rated power of the energy storage unit, Indicates the first Each energy storage node; Represents the time t. The active power of the x-th energy storage unit is calculated in the next iteration. =0; This indicates the total number of iterations.

[0012] Further, in step S7, it is determined whether the energy storage of the current regulating node meets the requirements; if not, the current regulating node is removed, and the process returns to step S5 to reselect the current regulating node; if yes, the active power of the energy storage of the current regulating node is determined, including: Determine if it satisfies and Sometimes, or and ; If not, the voltage sensitivity of the current regulating node is set to zero, and the process returns to step S5. The energy storage access node with the highest voltage sensitivity is then selected as the new current regulating node. If so, the active power of the energy storage of the current regulating node is determined based on the upper and lower limits of the active power output of the energy storage of the current regulating node, as well as the active power that the energy storage of the current regulating node should provide.

[0013] Further, in step S7, the active power of the energy storage at the current regulating node is calculated using formula (6): (6) In the formula, Represents the time t. The active power of the energy storage at the x-th node in the next iteration.

[0014] Furthermore, in step S8, the updated voltage of each node is calculated using formula (7): (7) In the formula, , They represent the time t, respectively. Upstream node voltage and downstream node voltage in the next iteration calculation; , They represent Time of the first The upstream node voltage and downstream node voltage are calculated in each iteration.

[0015] Furthermore, in step S9, formula (8) is used to superimpose the active power of energy storage calculated in each cycle to control the output of each energy storage unit: (8) In the formula, express Time of the first Energy storage output.

[0016] On the other hand, the present invention also provides a terminal device, characterized in that it includes a memory and a processor; the memory stores program code that can be executed by the processor; the program code is used to execute any of the above-mentioned energy storage active power control methods.

[0017] The active power control method and terminal equipment for energy storage in addressing voltage overshoot at multiple nodes on feeders provided by this invention have at least the following beneficial effects: The node with the largest absolute value of exceeding the limit is selected as the current governance node, and nodes with severe limit exceeding are given priority for governance; The node with the highest voltage sensitivity to the current control node on the feeder is selected as the current control node; this allows for a more timely response to nodes that are severely exceeding limits, and enables rapid control of these nodes through the node with the highest voltage sensitivity.

[0018] Based on the locations of the current governance nodes and the current regulation nodes, as well as the voltage and over-limit values ​​of the current governance nodes, the active power that the energy storage of the current regulation node should provide is determined. Then, the upper and lower limits of the active power output of the current regulation node are calculated. Combined with previously determined data, it is determined whether the current regulation node should output power and how much. Finally, under the premise that the current regulation node outputs power according to the active power of the energy storage, the expected voltage of each node is calculated, resulting in the updated voltage of each node. It is then determined whether there are still over-limit voltages on the feeder. If so, the process returns to governance; if not, the energy storage output of each energy storage access node is controlled based on the active power of the energy storage calculated in each cycle. This allows for effective governance of voltage over-limits at multiple nodes by controlling the active power output of each energy storage system on the feeder. Attached Figure Description

[0019] Figure 1 This is a flowchart of one embodiment of the energy storage active power control method of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of this invention involve directional indications, such as up: down: left: right: front: back, etc., these directional indications are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. Furthermore, if the embodiments of this invention involve descriptions such as "first: second," "S1: S2," "step one: step two," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance, or implicitly indicating the number of technical features indicated, or indicating the execution order of the method. Those skilled in the art will understand that anything that does not violate the inventive concept should be included within the scope of protection of this invention.

[0022] like Figure 1 As shown, this invention provides a method for controlling the active power of energy storage to address voltage overshoot at multiple nodes on a feeder. This method can be used, but is not limited to, for controlling voltage overshoot at multiple nodes on photovoltaic-rich feeders, particularly for controlling voltage overshoot at multiple nodes on 10kV feeders. The method includes: S1: Obtain the location, rated power, and rated voltage of each energy storage access node on the feeder; and collect the voltage of each node on the feeder; then run a loop count. ; Specifically, the energy storage access node on the feeder can be optionally represented as... , This represents the number of energy storage access nodes and is a positive integer. This represents one of the energy storage access nodes. The location, rated power, and feeder rated voltage of the energy storage access node can be obtained directly from engineering data, on-site measurements, and standard specifications. More specifically: The location of each energy storage access node can be marked with line pole number, bus number, etc., to represent the distance and direction of each node, and the upstream and downstream relationship and resistance between each node will be determined later. The rated power of each energy storage access node can be optionally expressed as... Example: Indicates the first The rated power of the energy storage of the node, of which Indicates the first One energy storage, Indicates the first Each energy storage node; The rated voltage of the feeder can be denoted as... .

[0023] The voltage at each node is collected, which can be done in real time using sensors such as voltmeters, and recorded as the voltage set. ,; This represents the number of nodes on the feeder line and is a positive integer. This indicates one of the nodes on the feeder line. ;by Taking the initial moment as an example, the initial voltage set is obtained; as time progresses, arbitrary voltage sets are gradually obtained. Voltage set at time.

[0024] S2: Determine if there is an over-limit voltage on the feeder; if not, return to step S1; if yes, proceed to step S3. Specifically, the upper and lower limits of the operating voltage on the feeder can be determined, and the voltage at each node can be set accordingly. The voltage is compared with the upper and lower limits to determine if there are any nodes exceeding the limits on the feeder. If not, the process returns to S1 and waits for the next moment to re-collect the voltage of each node on the feeder before making a judgment. In fact , for the updated time Then, further judgments and calculations are performed until there is an over-limit voltage on the feeder that needs to be addressed; if so, proceed to the next step S3.

[0025] S3: Calculate the voltage over-limit value of each node and select the node with the largest absolute value of over-limit as the current governance node; Specifically, formula (1) can be used to calculate the over-limit value of the voltage at each node. The node with the largest absolute value of exceeding the limit is selected as the current governance node. Entering the governance phase: (1) In the formula, This is the rated voltage of the feeder. , These represent the upper and lower voltage limits that are allowed to operate on the feeder, respectively. For time t, the first The voltage at node i is calculated in the next iteration; For time t, the first The over-limit value of node i in the next iteration.

[0026] S4: Based on the location of each energy storage access node and the current governance node, calculate the voltage sensitivity of the active power change of each energy storage access node on the feeder to the current governance node. Specifically, formula (2) can be used to calculate voltage sensitivity: (2) In the formula, This represents the voltage change at the current governance node i caused by the change in unit active power at each energy storage access node. Indicates the rated voltage of the feeder; Indicates the first Each energy storage node; This represents the resistance between feeder node n and node n+1, which can be determined based on the node location.

[0027] S5: Select the energy storage access node with the highest voltage sensitivity. The current regulating node; specifically, the energy storage node with the highest voltage sensitivity is selected first. Prioritize its management.

[0028] S6: Based on the current governance node and the current adjustment node The location and voltage of the current governance node. and exceeding the limit value Calculate the current adjustment node The active power that energy storage should provide ; Specifically, because the current governance node exists at the current adjustment node... The upstream / downstream possibilities can be determined by constructing an energy storage active power voltage regulation model based on the location of each energy storage access node and the current governance node, the current voltage of the current governance node, and the over-limit value, as shown in formula (3), to determine the current regulation node. The active power that energy storage should provide : (3) In the formula, Represents the time t. In the next iteration of the calculation, the current governance node is... Change the limit value At that time, the current adjustment node The active power that the energy storage should provide; Indicates the location of the current adjustment node Or the current adjustment node Upstream node cluster, Indicates the location of the current adjustment node Downstream node clusters.

[0029] S7: Calculate the upper and lower limits of the active power output of the energy storage at the current regulating node. And in combination with the current adjustment node The active power that energy storage should provide Determine whether the energy storage of the current regulating node meets the requirements; if not, remove the current regulating node, return to step S5, and reselect the current regulating node; if yes, determine the active power of the energy storage of the current regulating node. Specifically, formulas (4) and (5) can be used to calculate the upper and lower limits of the active power output of the current regulating node: (4) (5) In the formula, , They represent the time t, respectively. The upper and lower limits of the active power output of the energy storage of the current adjustment node in the next cycle calculation; Indicates the first The rated power of the energy storage unit, Indicates the first Each energy storage node; Represents the time t. The active power of the x-th energy storage unit is calculated in the next iteration. =0; This indicates the total number of iterations.

[0030] More specifically, determine whether the energy storage of the current regulating node meets the requirements; if not, remove the current regulating node, return to step S5, and reselect the current regulating node; if yes, determine the active power of the energy storage of the current regulating node, including: Determine if it satisfies and Sometimes, or and ; If not (indicating that the current regulating node cannot output power - that is, it cannot charge or discharge as required), then the voltage sensitivity of the current regulating node is set to zero, and the process returns to step S5. The energy storage access node with the highest voltage sensitivity is then selected as the new current regulating node. If so, then based on the upper and lower limits of the active power output of the energy storage at the current regulating node, and the current regulating node... The active power that energy storage should provide Determine the active power of energy storage at the current regulating node. That is, to plan the output.

[0031] Preferably, formula (6) can be used to calculate the active power of the energy storage at the current regulating node: (6) In the formula, Represents the time t. The active power of the energy storage at the x-th node in the next iteration.

[0032] S8: Based on the current energy storage active power of the adjustment node Calculate the voltage of each node to obtain the updated voltage of each node; Specifically, in step S7, the active power of the energy storage at the current regulating node is determined. Then, the current adjustment node is determined according to the active power of energy storage. Output power, then calculate the impact of that output power on each node, that is, the expected voltage of each node under this processing condition, and obtain the updated voltage; Specifically, formula (7) can be used to calculate the voltage at each node: (7) In the formula, , They represent the time t, respectively. Upstream node voltage and downstream node voltage in the next iteration calculation; , They represent Time of the first The upstream node voltage and downstream node voltage are calculated in each iteration.

[0033] S9: Based on the updated voltage at each node and the rated voltage of the feeder, determine whether there is still an over-limit voltage on the feeder (refer to step S2 for specific determination steps); if so, continue counting. Increment by 1, return to step S3, and proceed to the next iteration update of S8-S9; otherwise, calculate the active power of each energy storage access node in each loop. Control the output of each energy storage unit.

[0034] Preferably, formula (8) can be used, which superimposes the active power of each energy storage unit calculated in each cycle. The energy storage output of each energy storage access node is denoted as . Collection of active power of each energy storage unit at any given time and will These signals serve as control signals for the corresponding energy storage converters, enabling the energy storage to output the corresponding active power and completing the energy storage active power control for this round of multi-node voltage over-limit.

[0035] (8) In the formula, express Time of the first Energy storage output.

[0036] Preferably, if further follow-up is required, then... Return to step S1, collect the voltage of each node, and then determine whether there is an over-limit voltage. If so, proceed with the treatment phase again according to the above steps.

[0037] The active power control method for energy storage in addressing multi-node voltage exceedance on feeders provided by this invention has at least the following beneficial effects: The node with the largest absolute value of exceeding the limit is selected as the current governance node, and nodes with severe limit exceeding are given priority for governance; The node with the highest voltage sensitivity to the current control node on the feeder is selected as the current control node; this allows for a more timely response to nodes that are severely exceeding limits, and enables rapid control of these nodes through the node with the highest voltage sensitivity.

[0038] Based on the locations of the current governance nodes and the current regulation nodes, as well as the voltage and over-limit values ​​of the current governance nodes, the active power that the energy storage of the current regulation nodes should provide is determined. Then, the upper and lower limits of the energy storage output of the current regulation nodes are calculated. Combined with previously determined data, it is determined whether the current regulation nodes should output energy and how much. Finally, under the premise that the current regulation nodes output energy according to the active power of the energy storage, the expected voltage of each node is calculated, resulting in the updated voltage of each node. It is then determined whether over-limit voltages still exist on the feeder. If so, the process returns to governance; if not, the energy storage output of each energy storage access node is controlled based on the active power of the energy storage calculated in each cycle. This allows for effective governance of voltage over-limits at multiple nodes by controlling the active power output of each energy storage system on the feeder.

[0039] On the other hand, the present invention also provides a computer storage medium storing executable program code; the executable program code is used to execute any of the above-mentioned energy storage active power control methods.

[0040] On the other hand, the present invention also provides a terminal device, including a memory and a processor; the memory stores program code that can be executed by the processor; the program code is used to execute any of the above-mentioned energy storage active power control methods.

[0041] For example, the program code can be divided into one or more modules / units, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the program code in the terminal device.

[0042] The terminal device can be a desktop computer, laptop, handheld computer, cloud server, or other computing device. The terminal device may include, but is not limited to, a processor and memory. Those skilled in the art will understand that the terminal device may also include input / output devices, network access devices, buses, etc.

[0043] The processor can be a Central Processing Unit (CPU), or other general-purpose processors such as Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor.

[0044] The memory can be an internal storage unit of the terminal device, such as a hard drive or RAM. The memory can also be an external storage device of the terminal device, such as a plug-in hard drive, SmartMedia Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, the memory can include both internal and external storage units of the terminal device. The memory is used to store the program code and other programs and data required by the terminal device. The memory can also be used to temporarily store data that has been output or will be output.

[0045] The aforementioned computer storage medium and terminal equipment are created based on the aforementioned energy storage active power control method. Their technical functions and beneficial effects will not be elaborated here. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for controlling the active power of energy storage to address voltage exceedance at multiple nodes on a feeder, characterized in that, Comprising: S1: obtaining the positions of each energy storage access node on the feeder, the rated power of each energy storage access node, and the rated voltage of the feeder; and collect the voltage of each node on the feeder; let the loop count ; S2: determining whether there is an out-of-limit voltage on the feeder; if not, returning to step S1; if yes, proceeding to step S3; S3: calculating the out-of-limit value of the voltage of each node and selecting the node with the largest absolute value of the out-of-limit value as the current management node; S4: calculating the voltage sensitivity of the active power variation of each energy storage access node to the current management node according to the positions of each energy storage access node and the current management node; S5: selecting the energy storage access node with the largest voltage sensitivity as the current adjustment node; S6: calculating the active power that the energy storage of the current adjustment node should provide according to the positions of the current management node and the current adjustment node and the voltage and out-of-limit value of the current management node; S7: calculating the upper limit and lower limit of the active power output of the energy storage of the current adjustment node and determining whether the energy storage of the current adjustment node meets the requirements in combination with the active power that the energy storage of the current adjustment node should provide; if not, eliminating the current adjustment node, returning to step S5, and reselecting the current adjustment node; if yes, determining the active power of the energy storage of the current adjustment node; S8: calculating the voltage of each node according to the active power of the energy storage of the current adjustment node to obtain the updated voltage of each node; S9: According to the updated voltage of each node and the rated voltage of the feeder, it is judged whether there is still an out-of-limit voltage on the feeder; if yes, the cycle count is incremented If not, the energy storage active power calculated in each cycle is used to control the output of each energy storage.

2. The energy storage active power control method of claim 1, wherein, In step S3, the out-of-limit value of the voltage of each node is calculated by formula (1): (1) In the formula, This is the rated voltage of the feeder. , These represent the upper and lower voltage limits that are allowed to operate on the feeder, respectively. For time t, the first The voltage at node i is calculated in the next iteration; For time t, the first The value exceeding the limit for node i in the next iteration.

3. The energy storage active power control method of claim 1, wherein, In step S4, the voltage sensitivity is calculated by formula (2): (2) wherein, represents the current voltage variation of the governing node i caused by the unit active power variation of each energy storage access node; represents the feeder rated voltage; represents the node where the i-th energy storage is located; represents the node where the i-th energy storage is located; represents the resistance between feeder nodes n and n+1.

4. The energy storage active power control method of claim 1, wherein, In step S6, the energy storage active power voltage regulation model is constructed using formula (3) to calculate the active power that the energy storage of the current regulation node should provide: ​ (3) In the formula, Represents the time t. In the next iteration of the calculation, the current governance node is... Change the limit value At that time, the current adjustment node The active power that the energy storage should provide; Indicates the location of the current adjustment node Or the current adjustment node Upstream node cluster, Indicates the location of the current adjustment node Downstream node clusters.

5. The energy storage active power control method of claim 4, wherein, In step S7, the upper limit and lower limit of the active power output of the energy storage of the current adjustment node are calculated by formulas (4) and (5): (4) (5) In the formula, , respectively represent the upper limit and the lower limit of the energy storage active power output of the current regulation node in the t time point and the n th loop calculation; represent the rated power of the x th energy storage, represent the node where the x th energy storage is located; represent the active power of the x th energy storage in the t time point and the n th loop calculation, =0; represent the total number of loop calculations.​​​​ 6. The energy storage active power control method of claim 5, wherein, In step S7, it is determined whether the energy storage of the current adjustment node meets the requirements; if not, the current adjustment node is eliminated, returning to step S5, and the current adjustment node is reselected; if yes, the active power of the energy storage of the current adjustment node is determined, comprising: determining whether or not the condition is satisfied and or and ; if not, the voltage sensitivity of the current adjustment node is reset to zero, returning to step S5, and the energy storage access node with the largest voltage sensitivity is reselected as the new current adjustment node; if yes, the active power of the energy storage of the current adjustment node is determined according to the upper limit and lower limit of the active power output of the energy storage of the current adjustment node and the active power that the energy storage of the current adjustment node should provide.

7. The energy storage active power control method of claim 5, wherein, In step S7, the active power of the energy storage of the current adjustment node is calculated by formula (6): (6) In the formula, Represents the time t. The active power of the energy storage at the x-th node in the next iteration.

8. The energy storage active power control method of claim 1, wherein, In step S8, the updated voltage of each node is calculated by formula (7): (7) In the formula, , respectively represent the upstream node voltage and the downstream node voltage in the tth cycle calculation at time t; , , respectively represent the upstream node voltage and the downstream node voltage in the tth cycle calculation at time t; , respectively represent the upstream node voltage and the downstream node voltage in the tth cycle calculation at time t.

9. The energy storage active power control method of claim 1, wherein, In step S9, the active power of the energy storage calculated in each loop is superimposed by formula (8) to control the output of each energy storage: (8) In the formula, represents at the time the energy storage output.

10. A terminal device, comprising: comprising a memory and a processor; the memory stores program code executable by the processor; the program code is used to execute the energy storage active power control method in any one of claims 1 to 9. comprising a memory and a processor; the memory stores program code executable by the processor; the program code is used to execute the energy storage active power control method in any one of claims 1 to 9.

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