A voltage coordination control method and system in a power distribution network

Abstract

The application provides a voltage cooperative control method and system in a power distribution network, and belongs to the technical field of power supply. Specifically, the voltage cooperative regulation processing is performed on the voltage node with a photovoltaic system based on a cooperative regulation strategy and a storage device. When the regulation delay condition of the voltage node with the photovoltaic system under the weather type does not meet the requirement based on the regulation processing result of the cooperative regulation processing, whether the adjustment processing of the local regulation node needs to be performed is determined based on the regulation data of the local regulation node and the regulation data of the storage device under the weather type, so that the frequency of voltage regulation control of the storage device is reduced.

Description

Technical Field

[0001] This invention belongs to the field of power supply technology, and in particular relates to a voltage coordination control method and system in a power distribution network. Background Technology

[0002] During the operation of a power distribution network, it is inevitable that some voltage nodes will exceed their voltage limits. This will affect the operational reliability of the entire power distribution network and the power supply reliability of electricity users. Therefore, how to control the voltage in the power distribution network to ensure the stability and reliability of the voltage at the voltage nodes has become an urgent technical problem to be solved.

[0003] To address the aforementioned technical problems, the invention patent application CN202510962452.6, "A High-Penetration Photovoltaic Grid-Connected Voltage Stability Control Method and Related Device," updates the reactive power output adjustment of each photovoltaic node based on calculation results; the updated reactive power output adjustment of each photovoltaic node is then fed back to the photovoltaic inverter controller for reactive power output adjustment, thus improving grid operation stability. However, the above technical solution has the following technical problems: When performing coordinated voltage control in the distribution network, when a new energy node detects a voltage deviation, it will adjust its reactive power output to regulate the voltage. Therefore, if the composition of the new energy equipment at the voltage node in the distribution network that exceeds the voltage limit is ignored when determining the coordinated voltage control strategy for the energy storage device, it will lead to an excessively high frequency of response and adjustment processing by the energy storage device, which will affect the service life of the energy storage device's battery.

[0004] To address the aforementioned technical problems, this invention provides a voltage coordination control method and system for power distribution networks. Summary of the Invention

[0005] To achieve the objectives of this invention, the following technical solution is adopted: According to one aspect of the present invention, a voltage coordination control method in a power distribution network is provided.

[0006] A voltage coordination control method in a power distribution network, specifically including: S1 determines the voltage deviation data of the voltage node based on the monitoring data of the voltage node in the distribution network, determines the local regulation node in the voltage node based on the voltage deviation data and the regulation data of the photovoltaic system of the voltage node, and determines the coordinated regulation strategy of the energy storage device for voltage control of the distribution network based on the composition data of the local regulation node and the voltage node with photovoltaic system. S2 uses the energy storage device and the voltage node with the photovoltaic system to perform coordinated voltage regulation based on the coordinated regulation strategy. Based on the regulation results of the coordinated regulation, if the regulation delay of the voltage node with the photovoltaic system does not meet the requirements under the weather type, it determines whether the local regulation node needs to be adjusted based on the regulation data of the local regulation node and the regulation data of the energy storage device under the weather type.

[0007] The beneficial effects of this invention are as follows: In this application, based on the composition data of local regulation nodes and voltage nodes with photovoltaic systems, a coordinated regulation strategy for voltage control of energy storage devices in the distribution network is determined. This eliminates local regulation nodes with a high probability of voltage deviation and high reliability of their own photovoltaic systems, further reducing the frequency of voltage regulation processing of the energy storage system. Furthermore, by combining the voltage node data with photovoltaic systems, the coordinated regulation strategy for voltage control of energy storage devices in the distribution network is determined from the perspective of the number of voltage nodes with photovoltaic systems. This ensures the reliability of voltage control in the distribution network and avoids the technical problem of putting the energy storage system into operation for voltage regulation before the voltage nodes with photovoltaic systems have completed their own regulation due to the short regulation time of their own photovoltaic systems, which has a significant impact on the service life of the energy storage system.

[0008] In this application, based on the regulation data of local regulation nodes and the regulation data of energy storage devices under different weather conditions, it is determined whether local regulation node adjustment is required. This not only avoids the technical problem of turning local regulation nodes into ordinary voltage nodes existing in photovoltaic systems under weather conditions with high frequency of energy storage device adjustments, thus increasing the frequency of energy storage device adjustments, but also, by combining the regulation data of local regulation nodes, adjustment processing for local regulation nodes with fewer adjustments is achieved. This ensures the frequency of energy storage device adjustments while also reducing the delay in voltage adjustment processing of voltage nodes.

[0009] Furthermore, the voltage deviation data of the voltage node includes data on voltage shifts that have occurred in the history of the voltage node.

[0010] Furthermore, the adjustment data of the photovoltaic system at the voltage node includes the adjustment data determined by the photovoltaic system at the voltage node through reactive power adjustment to make the monitored voltage of the voltage node reach the target voltage when the voltage deviation occurs. The target voltage is defined as a deviation rate of less than 0.5% from the reference voltage.

[0011] Furthermore, the method for determining the local regulation node in the voltage node is as follows: Based on the voltage deviation data of the voltage node, determine the time periods in history during which the voltage node experienced voltage shifts; Based on the regulation data of the photovoltaic system during the period in which the voltage deviation occurred, the period in which the regulation of the photovoltaic system was successful during the period in which the voltage deviation occurred is determined and is taken as the period of successful regulation. By utilizing the periods during which voltage shifts occurred and the periods during which regulation was successfully implemented in the history of the voltage node, it is determined whether the voltage node is a local regulation node.

[0012] Further, determine whether local adjustment nodes need to be adjusted, specifically including: Based on the adjustment data of the local adjustment node under the aforementioned weather type, determine the number of adjustments made by the local adjustment node during the period in which voltage deviation occurs under the aforementioned weather type; Based on the adjustment data of the energy storage device, the number of adjustments made by the energy storage device under the weather type is determined; Based on the number of times the local regulating node adjusts during the period of voltage deviation under the weather type and the number of times the energy storage device adjusts under the weather type, it is determined whether the local regulating node needs to be adjusted.

[0013] On the other hand, the present invention provides a computer system comprising: a memory and a processor connected in communication, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the voltage coordination control method in a power distribution network described above when running the computer program.

[0014] Other features and advantages will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] The above and other features and advantages of the present invention will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0017] Figure 1 This is a flowchart of a voltage coordination control method in a power distribution network; Figure 2 This is a flowchart illustrating the method for determining the local regulation node in the voltage node; Figure 3 This is a flowchart illustrating the method for determining the coordinated regulation strategy of energy storage devices for voltage control in power distribution networks. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0019] To facilitate understanding, the following will describe the scheme through Embodiment 1 and Embodiment 2. In this application, when using an energy storage system to control the voltage of voltage nodes in a distribution network, after excluding local regulation nodes that use their own photovoltaic systems for voltage regulation, and when there are many voltage nodes that require a long adjustment time to use their own photovoltaic systems for voltage regulation, the energy storage device is then used for voltage control and regulation. This reduces the frequency of the energy storage system's operation and improves its service life.

[0020] Example 1 To solve the above problems, according to one aspect of the present invention, such as Figure 1 As shown, according to one aspect of the present invention, a voltage coordination control method in a power distribution network is provided, specifically including: S1 determines the voltage deviation data of the voltage node based on the monitoring data of the voltage node in the distribution network, determines the local regulation node in the voltage node based on the voltage deviation data and the regulation data of the photovoltaic system of the voltage node, and determines the coordinated regulation strategy of the energy storage device for voltage control of the distribution network based on the composition data of the local regulation node and the voltage node with photovoltaic system. Furthermore, the voltage deviation data of the voltage node includes data on voltage shifts that have occurred in the history of the voltage node.

[0021] It is understood that when the deviation rate between the monitored voltage and the reference voltage at a certain monitoring moment is greater than 2%, it is determined that the voltage node has experienced a voltage shift at that monitoring moment. Specifically, the deviation rate is determined based on the ratio of the absolute value of the deviation between the monitored voltage and the reference voltage to the reference voltage.

[0022] Furthermore, the adjustment data of the photovoltaic system at the voltage node includes the adjustment data determined by the photovoltaic system at the voltage node through reactive power adjustment to make the monitored voltage of the voltage node reach the target voltage when the voltage deviation occurs. The target voltage is defined as a deviation rate of less than 0.5% from the reference voltage.

[0023] Specifically, such as Figure 2 As shown, the method for determining the local regulation node in the voltage node is as follows: Based on the voltage deviation data of the voltage node, determine the time periods in history during which the voltage node experienced voltage shifts; Based on the regulation data of the photovoltaic system during the period in which the voltage deviation occurred, the period in which the regulation of the photovoltaic system was successful during the period in which the voltage deviation occurred is determined and is taken as the period of successful regulation. By utilizing the periods during which voltage shifts occurred and the periods during which regulation was successfully implemented in the history of the voltage node, it is determined whether the voltage node is a local regulation node.

[0024] It should be noted that the time period in which voltage deviation occurs refers to the time period in which the proportion of monitoring times in which voltage deviation occurs is greater than 0.3.

[0025] It should be noted that the successful adjustment period is the period during which the photovoltaic system, through reactive power regulation, maintains the monitored voltage of the voltage node up to the target voltage during the voltage shift period.

[0026] It is understood that determining whether a voltage node is a local regulation node involves using the periods during which voltage deviations occurred and the periods during which regulation was successfully implemented in the historical data. Specifically, this includes: When the average daily number of voltage shifts that occur in the history of the voltage node is not greater than a preset threshold, the frequency of its adjustment is not high, and the voltage node is determined not to be a local adjustment node. In one possible embodiment, if the average daily number of periods in the history during which the voltage node experiences voltage shifts is not greater than 0.1, then the voltage node is determined not to be a local regulation node. Additionally, it is understood that when the average daily number of periods in the history of voltage node where voltage deviation occurs is greater than a preset threshold, it is also necessary to determine whether the successful adjustment period meets the requirements of the periods in which voltage deviation occurs. That is, if the proportion of the successful adjustment period to the number of periods in which voltage deviation occurs is greater than 0.9, then the voltage node is determined to be a local adjustment node; otherwise, it is determined not to be a local adjustment node.

[0027] Optionally, the method for determining the local regulation node in the voltage node is as follows: Based on the voltage deviation data of the voltage node, determine the time periods in history during which the voltage node experienced voltage shifts; Based on the regulation data of the photovoltaic system during the period in which the voltage deviation occurred, the period in which the regulation of the photovoltaic system was successful during the period in which the voltage deviation occurred is determined and is taken as the period of successful regulation. By using the time period data of the voltage node in the historical period of voltage deviation, excluding the period of successful adjustment, it is determined whether the voltage node is a local adjustment node.

[0028] It is understood that when the number of time periods in the history of voltage offset, excluding the time periods of successful adjustment, is less than a preset threshold number of time periods, the voltage node is determined to be a local adjustment node.

[0029] Specifically, such as Figure 3 As shown, the method for determining the coordinated regulation strategy of the energy storage device for voltage control in the distribution network is as follows: Based on the local regulation node data, voltage nodes other than local regulation nodes in the distribution network are identified and treated as other nodes. Based on the composition data of the voltage nodes with photovoltaic systems in the other nodes, determine the number of voltage nodes with photovoltaic systems in the other nodes. By utilizing the number of voltage nodes with photovoltaic systems in the other nodes, a coordinated regulation strategy for voltage control of the energy storage device in the distribution network is determined.

[0030] It should be noted that, based on the number of voltage nodes with photovoltaic systems among the other nodes, the coordinated regulation strategy for voltage control of the energy storage device in the distribution network is determined, specifically including: Based on the number of voltage nodes with photovoltaic systems in the other nodes, determine the voltage nodes in the other nodes excluding those with photovoltaic systems, and designate them as nodes to be adjusted. When the number of nodes to be adjusted is greater than the preset threshold for the number of adjustable nodes, i.e., more than 10, then there are a large number of voltage nodes that cannot be adjusted by the photovoltaic system. Based on this, the first preset strategy is adopted to determine the coordinated adjustment strategy for voltage control of the energy storage device in the distribution network.

[0031] When the number of nodes to be adjusted is not greater than the preset threshold for the number of adjustment nodes, i.e., not greater than 10, the second preset strategy is adopted to determine the coordinated adjustment strategy for voltage control of the energy storage device in the power distribution network.

[0032] It is understood that the first preset strategy is to use the energy storage device for coordinated regulation of voltage control in the distribution network when the number of adjustable nodes with voltage deviation does not meet the requirements or the sum of the number of adjustable nodes with voltage deviation and the adjustment time is greater than the first preset adjustment time threshold does not meet the requirements. In one possible embodiment, when the number of adjustable nodes experiencing voltage shift is greater than 5, or when the sum of the number of adjustable nodes experiencing voltage shift and the number of voltage nodes in the photovoltaic system still in a voltage shift state after the adjustment time after the voltage shift is greater than 3 minutes is greater than 10, the energy storage device is used for coordinated regulation processing of voltage control in the distribution network. Specifically, the second preset strategy is to utilize the energy storage device for coordinated regulation of voltage control in the distribution network when the sum of the number of voltage-shifting nodes and the number of voltage-shifting nodes in the photovoltaic system that have voltage shifts is greater than the second preset regulation duration threshold does not meet the requirements.

[0033] In one possible embodiment, the second preset strategy is to utilize the energy storage device for voltage control of the distribution network when the sum of the number of adjustable nodes with voltage deviation and the number of voltage nodes in the photovoltaic system that are still in a voltage deviation state after the adjustment time after the voltage deviation is greater than 10.

[0034] Optionally, the method for determining the coordinated regulation strategy of the energy storage device for voltage control in the distribution network is as follows: Based on the local regulation node data, voltage nodes other than local regulation nodes in the distribution network are identified and treated as other nodes. Based on the composition data of the voltage nodes with photovoltaic systems in the other nodes, determine the number of voltage nodes with photovoltaic systems in the other nodes. Based on the number of voltage nodes with photovoltaic systems among the other nodes, the voltage nodes with photovoltaic systems are excluded from the other nodes and are identified as nodes to be regulated. Based on the nodes to be regulated, a coordinated regulation strategy for voltage control of the energy storage device in the distribution network is determined.

[0035] It should be noted that when the proportion of the node to be adjusted among other nodes is greater than a preset proportion threshold, the first preset strategy is used to determine the coordinated adjustment strategy of the energy storage device for voltage control of the distribution network.

[0036] Additionally, it can be understood that when the proportion of the node to be adjusted among other nodes is not greater than a preset proportion threshold, a second preset strategy is adopted to determine the coordinated adjustment strategy for voltage control of the energy storage device in the distribution network.

[0037] It is understood that the weather type is divided according to the amount of sunshine. Specifically, if the deviation rate of sunshine between the date and other dates is less than a preset deviation rate threshold, then the date and other dates are classified into the same weather type.

[0038] In one possible embodiment, if the deviation rate of the amount of light between the date and other dates is less than 3%, that is, when the absolute value of the deviation of the amount of light between the date and other dates is less than 3% to the amount of light on the date, then the date and other dates are classified into the same weather type.

[0039] S2 uses the energy storage device and the voltage node with the photovoltaic system to perform coordinated voltage regulation based on the coordinated regulation strategy. Based on the regulation results of the coordinated regulation, if the regulation delay of the voltage node with the photovoltaic system does not meet the requirements under the weather type, it determines whether the local regulation node needs to be adjusted based on the regulation data of the local regulation node and the regulation data of the energy storage device under the weather type.

[0040] Furthermore, it was determined that the regulation delay of voltage nodes in the photovoltaic system did not meet the requirements, specifically including: The duration for which the monitored voltage of a voltage node with a photovoltaic system under the aforementioned weather type is maintained at the target voltage during the period when voltage deviation occurs is used as the adjustment duration. Based on the adjustment duration of the voltage nodes with photovoltaic systems during periods of voltage deviation, the average adjustment duration of the voltage nodes with photovoltaic systems during periods of voltage instability is determined under the aforementioned weather type. Using the average adjustment time, it is determined whether the adjustment delay of the voltage node of the photovoltaic system meets the requirements under the given weather type.

[0041] It should be noted that when the average adjustment time of the voltage nodes of the photovoltaic system under different weather conditions during the period of voltage deviation is greater than the preset time value, i.e., greater than 10 minutes, it is determined that the adjustment delay of the voltage nodes of the photovoltaic system under the weather condition does not meet the requirements.

[0042] Further, determine whether local adjustment nodes need to be adjusted, specifically including: Based on the adjustment data of the local adjustment node under the aforementioned weather type, determine the number of adjustments made by the local adjustment node during the period in which voltage deviation occurs under the aforementioned weather type; Based on the adjustment data of the energy storage device, the number of adjustments made by the energy storage device under the weather type is determined; Based on the number of times the local regulating node adjusts during the period of voltage deviation under the weather type and the number of times the energy storage device adjusts under the weather type, it is determined whether the local regulating node needs to be adjusted.

[0043] It should be noted that, firstly, the number of times the energy storage device adjusts under the given weather type is determined. When the number of times the energy storage device adjusts under the given weather type does not meet the requirements, that is, when the energy storage device performs coordinated control processing of voltage nodes on different days of the given weather type, the adjustment frequency of the energy storage device under the given weather type is relatively high. Therefore, if the local adjustment node is adjusted, the adjustment frequency of the energy storage device will become even higher, which will affect the service life of the energy storage device. Therefore, in this case, it is determined that no adjustment processing of the local adjustment node is required.

[0044] Furthermore, when the number of adjustments by the energy storage device under the weather type meets the requirements, it is also necessary to determine the maximum value of the number of adjustments by the energy storage device on the date under the weather type. When the maximum value of the number of adjustments is greater than the preset adjustment number threshold, which is more than 10 times in a possible embodiment, if the local adjustment node is adjusted, the adjustment frequency of the energy storage device will become higher, which will affect the service life of the energy storage device. Therefore, in this case, it is determined that no adjustment of the local adjustment node is required under the weather type.

[0045] Additionally, it is understood that when the maximum number of adjustments is not greater than the preset adjustment number threshold, it is necessary to further determine the adjustment data of the local adjustment nodes under the weather type. When the average number of local adjustment nodes with voltage deviations on different dates under the weather type is less than the preset node number threshold (i.e., less than 4), the addition of local adjustment nodes will not cause the energy storage device to adjust too frequently. Therefore, based on this, all local adjustment nodes under the weather type are adjusted so that they are no longer local adjustment nodes, but voltage nodes with photovoltaic systems. They are then coordinated with all voltage nodes with photovoltaic systems according to the coordinated adjustment strategy of the energy storage device for voltage control in the distribution network, thereby reducing the adjustment delay of voltage nodes with photovoltaic systems.

[0046] Additionally, it is understood that when the average number of local regulating nodes with voltage deviations on different dates under the given weather type is not less than a preset node number threshold, it is also necessary to determine the number of times the local regulating nodes adjust during the voltage deviation periods on the dates under the given weather type. If the average number of times the local regulating nodes adjust during the voltage deviation periods on different dates under the given weather type is greater than a preset adjustment number threshold, i.e., greater than 3 times, then the addition of the local regulating nodes will lead to an excessively high adjustment frequency of the energy storage device. Therefore, based on this, it is determined that the local regulating nodes do not need to be adjusted under the given weather type.

[0047] Additionally, it should be noted that if the average number of adjustments made by the local regulating node during the voltage offset period on different dates under the aforementioned weather type is not greater than a preset adjustment number threshold, it is also necessary to determine the overlap between the period when the local regulating node uses the photovoltaic system for regulation and the coordinated regulation period during the voltage offset period under the aforementioned weather type. The overlap period between the period when the local regulating node uses the photovoltaic system for regulation and the coordinated regulation period during the voltage offset period under the aforementioned weather type is defined as the overlap period. If the overlap period does not meet the requirements, it will lead to excessively frequent adjustments by the energy storage device. Therefore, based on this, it is determined that the local regulating node does not need to be adjusted under the aforementioned weather type. However, if the overlap period meets the requirements, it is determined that the local regulating node needs to be adjusted under the aforementioned weather type, so that it no longer acts as a local regulating node, but as a voltage node with a photovoltaic system. It then performs coordinated regulation with all voltage nodes with photovoltaic systems according to the coordinated regulation strategy of the energy storage device for voltage control in the distribution network, thereby reducing the regulation delay of voltage nodes with photovoltaic systems.

[0048] It should be noted that the coordinated adjustment period is the period during which the energy storage device and the voltage node of the photovoltaic system are used for coordinated voltage adjustment under the weather type. When the proportion of the overlapping period in the coordinated adjustment period is greater than 0.9, the overlapping period is determined to not meet the requirements.

[0049] Optionally, determine whether local adjustment node processing is required, specifically including: Based on the adjustment data of the local adjustment node under the aforementioned weather type, determine the number of adjustments made by the local adjustment node during the period in which voltage deviation occurs under the aforementioned weather type; Based on the regulation data of the energy storage device, the coordinated regulation period of the energy storage device under the weather type is determined; Based on the number of times the local regulating node adjusts during the period of voltage deviation under the weather type and the overlap between the local regulating node's adjustment data and the coordinated adjustment period, it is determined whether the local regulating node needs to be adjusted.

[0050] It should be noted that if the average number of adjustments made by the local regulating node during the period of voltage deviation on different dates under the weather type is greater than the preset adjustment number threshold, i.e., more than 3 times, the addition of the local regulating node will cause the energy storage device to adjust too frequently. Therefore, based on this, it is determined that the local regulating node does not need to be adjusted under the weather type.

[0051] Additionally, it should be noted that if the average number of adjustments made by the local regulating node during the voltage offset period on different dates under the aforementioned weather type is not greater than a preset adjustment number threshold, it is also necessary to determine the overlap between the period when the local regulating node uses the photovoltaic system for regulation and the coordinated regulation period during the voltage offset period under the aforementioned weather type. The overlap period between the period when the local regulating node uses the photovoltaic system for regulation and the coordinated regulation period during the voltage offset period under the aforementioned weather type is defined as the overlap period. If the overlap period does not meet the requirements, it will lead to excessively frequent adjustments by the energy storage device. Therefore, based on this, it is determined that the local regulating node does not need to be adjusted under the aforementioned weather type. However, if the overlap period meets the requirements, it is determined that the local regulating node needs to be adjusted under the aforementioned weather type, so that it no longer acts as a local regulating node, but as a voltage node with a photovoltaic system. It then performs coordinated regulation with all voltage nodes with photovoltaic systems according to the coordinated regulation strategy of the energy storage device for voltage control in the distribution network, thereby reducing the regulation delay of voltage nodes with photovoltaic systems.

[0052] On the other hand, the present invention provides a computer system comprising: a memory and a processor connected in communication, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the voltage coordination control method in a power distribution network described above when running the computer program.

[0053] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and non-volatile computer storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0054] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0055] The above description is merely one or more embodiments of this specification and is not intended to limit this specification. Various modifications and variations can be made to the one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of this specification.

Claims

1. A voltage coordinated control method in a power distribution network, characterized in that, Specifically, it includes: Based on the monitoring data of voltage nodes in the distribution network, the voltage deviation data of the voltage nodes is determined. Based on the voltage deviation data and the adjustment data of the photovoltaic system of the voltage nodes, the local adjustment nodes in the voltage nodes are determined. Based on the composition data of the local adjustment nodes and the voltage nodes with photovoltaic systems, the coordinated adjustment strategy of the energy storage device for voltage control in the distribution network is determined. Based on the aforementioned coordinated regulation strategy, voltage is coordinated by the energy storage device and the voltage node of the photovoltaic system. Based on the regulation results of the coordinated regulation process, if the regulation delay of the voltage node of the photovoltaic system does not meet the requirements under the weather type, it is determined whether the local regulation node needs to be adjusted based on the regulation data of the local regulation node and the regulation data of the energy storage device under the weather type.

2. The voltage coordinated control method in a power distribution network as described in claim 1, characterized in that, The voltage deviation data of the voltage node includes data on voltage offsets that have occurred at the voltage node in history.

3. The voltage coordinated control method in a power distribution network as described in claim 1, characterized in that, The adjustment data of the photovoltaic system at the voltage node includes the adjustment data determined by the photovoltaic system at the voltage node to make the monitored voltage of the voltage node reach the target voltage through reactive power adjustment when the voltage deviation occurs.

4. The voltage coordinated control method in a power distribution network as described in claim 1, characterized in that, The method for determining the local regulation node in the voltage node is as follows: Based on the voltage deviation data of the voltage node, determine the time periods in history during which the voltage node experienced voltage shifts; Based on the regulation data of the photovoltaic system during the period in which the voltage deviation occurred, the period in which the regulation of the photovoltaic system was successful during the period in which the voltage deviation occurred is determined and is taken as the period of successful regulation. By utilizing the periods during which voltage shifts occurred and the periods during which regulation was successfully implemented in the history of the voltage node, it is determined whether the voltage node is a local regulation node.

5. The voltage coordinated control method in a power distribution network as described in claim 4, characterized in that, The successful adjustment period is the period during which the photovoltaic system, through reactive power regulation, maintains the monitored voltage of the voltage node up to the target voltage during the voltage shift period.

6. The voltage coordinated control method in a power distribution network as described in claim 1, characterized in that, The method for determining the coordinated regulation strategy of the energy storage device for voltage control in the distribution network is as follows: Based on the local regulation node data, voltage nodes other than local regulation nodes in the distribution network are identified and treated as other nodes. Based on the composition data of the voltage nodes with photovoltaic systems in the other nodes, determine the number of voltage nodes with photovoltaic systems in the other nodes. By utilizing the number of voltage nodes with photovoltaic systems in the other nodes, a coordinated regulation strategy for voltage control of the energy storage device in the distribution network is determined.

7. The voltage coordinated control method in a power distribution network as described in claim 6, characterized in that, Based on the number of voltage nodes with photovoltaic systems among the other nodes, a coordinated regulation strategy for voltage control of the energy storage device in the distribution network is determined, specifically including: Based on the number of voltage nodes with photovoltaic systems in the other nodes, determine the voltage nodes in the other nodes excluding those with photovoltaic systems, and designate them as nodes to be adjusted. When the number of nodes to be adjusted is greater than the preset threshold for the number of nodes to be adjusted, the first preset strategy is adopted to determine the coordinated adjustment strategy for voltage control of the energy storage device in the power distribution network.

8. The voltage coordinated control method in a power distribution network as described in claim 1, characterized in that, Determine whether local adjustment nodes need to be adjusted, specifically including: Based on the adjustment data of the local adjustment node under the aforementioned weather type, determine the number of adjustments made by the local adjustment node during the period in which voltage deviation occurs under the aforementioned weather type; Based on the adjustment data of the energy storage device, the number of adjustments made by the energy storage device under the weather type is determined; Based on the number of times the local regulating node adjusts during the period of voltage deviation under the weather type and the number of times the energy storage device adjusts under the weather type, it is determined whether the local regulating node needs to be adjusted.

9. The voltage coordinated control method in a power distribution network as described in claim 8, characterized in that, When the number of adjustments made by the energy storage device under the given weather type does not meet the requirements, it is determined that no adjustment of the local adjustment node is required.

10. A computer system, comprising: A memory and processor connected by communication, and a computer program stored in the memory and capable of running on the processor, characterized in that: when the processor runs the computer program, it executes a voltage coordinated control method in a power distribution network as described in any one of claims 1-9.

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