CN-122026544-A - Power distribution network partition cooperative control method and system based on boundary node attribution

Abstract

The invention discloses a power distribution network partition cooperative control method and system based on boundary node attribution, and belongs to the technical field of power distribution network control. The method comprises the steps of determining a power synchronization damaged critical period of a power supply area adjacent to an active power time sequence curve, then, according to the power synchronization damaged critical period and a historical voltage deviation sequence, effectively identifying boundary nodes generating power oscillation after the power synchronization is damaged, then, evaluating the power supply area attribution of each power oscillation boundary node of the adjacent power supply area according to the historical area reconstruction times and the historical voltage deviation sequence, so that the dynamic division of the power supply area attribution of the power oscillation boundary nodes can be realized, and finally, the configuration of the electrical data of each power supply area according to the power supply area attribution of the power oscillation boundary nodes is realized, so that the partition cooperative control of a power distribution network is realized, and the adaptability and the accuracy of the partition cooperative control of the power distribution network are improved.

Inventors

• XIE PENGLIN
• LAN TIANHONG
• PAN HAOMENG
• Chen Gailun
• SUN QI
• Ye Yiyan
• XIA QINQIN
• Ye Zike
• GUO HECHUAN
• FAN QUNYAN
• CHEN QILIN
• Pan Boli
• ZHAO CHANGCHUN
• XIE HUASEN
• CHEN XIAOLEI
• LI MIAO

Assignees

• 国网浙江省电力有限公司永嘉县供电公司
• 国网浙江省电力有限公司温州供电公司

Dates

Publication Date

20260512

Application Date

20260409

Claims (10)

1. 1. The power distribution network partition cooperative control method based on boundary node attribution is characterized by comprising the following steps of: Acquiring active power time sequence curves and photovoltaic injection power data of each power supply area in a power distribution network, and acquiring historical voltage deviation sequences and historical area reconstruction times of each boundary node of each adjacent power supply area; identifying a power change direction of the adjacent power supply region based on the active power timing curve, and determining a power synchronization impaired critical period of the adjacent power supply region based on the power change direction and the photovoltaic injection power data; Screening the boundary nodes of the adjacent power supply areas based on the power synchronization damaged critical period and the historical voltage deviation sequence, and determining a plurality of power oscillation boundary nodes of the adjacent power supply areas; determining the power supply area attribution of each power oscillation boundary node of the adjacent power supply areas based on the historical area reconstruction times and the historical voltage deviation sequences; and configuring the electrical data of each power supply area according to the attribution of the power supply area of each power oscillation boundary node so as to complete the regional cooperative control of the power distribution network.
2. 2. The method for collaborative control of power distribution network partitions based on boundary node affiliation according to claim 1, wherein identifying a power change direction of adjacent power supply areas based on the active power timing curve and determining a power synchronization impaired critical period of adjacent power supply areas based on the power change direction and the photovoltaic injection power data comprises: performing differential operation on the active power time sequence curve to determine a power variation sequence of each power supply area; determining a power change trend identification of each power supply area at each sampling moment based on the power change quantity sequence; comparing the power change trend identifications of the adjacent power supply areas at each sampling time, and determining the power change direction of the adjacent power supply areas at each sampling time; Determining a critical period of power synchronization impaired for adjacent ones of the power supply regions based on the power variation direction and the photovoltaic injection power data.
3. 3. The method for collaborative control of power distribution network partitioning based on boundary node attribution according to claim 2, wherein the determining a power synchronization impaired critical period of the adjacent power supply area based on the power variation direction and the photovoltaic injection power data comprises: Determining a plurality of power synchronization change moments of the adjacent power supply areas based on the power change directions of the adjacent power supply areas at each sampling moment; Determining a photovoltaic injection power overrun period of each power supply area based on the photovoltaic injection power data of each power supply area and a preset photovoltaic injection power threshold; Screening a plurality of power synchronicity change moments of the adjacent power supply areas based on the photovoltaic injection power overrun period of each power supply area, and determining the plurality of photovoltaic power synchronicity change moments of the adjacent power supply areas; Determining a plurality of photovoltaic power synchronous transformation periods of the adjacent power supply areas according to a preset time window and the photovoltaic power synchronous transformation moment; Determining an active power similarity score of adjacent power supply areas in each photovoltaic power synchronicity transformation period based on the photovoltaic power synchronicity transformation period and the active power timing curve, and determining a plurality of active power synchronicity transformation periods of the adjacent power supply areas based on the active power similarity score; And determining a critical period when the power synchronization of the adjacent power supply areas is damaged based on the photovoltaic power synchronization change moment and the active power synchronization change period of the adjacent power supply areas.
4. 4. The method for collaborative control of power distribution network partitioning based on boundary node attribution according to claim 2, wherein the screening the boundary nodes of the adjacent power supply areas based on the power synchronization damaged critical period and the historical voltage deviation sequence, determining a plurality of power oscillation boundary nodes of the adjacent power supply areas, comprises: determining the voltage fluctuation amplitude of each boundary node of the adjacent power supply area in the power synchronization damaged critical period based on the power synchronization damaged critical period and the historical voltage deviation sequence; constructing a voltage fluctuation vector of each boundary node of the adjacent power supply areas based on the voltage fluctuation amplitude; clustering the boundary nodes of the adjacent power supply areas based on the voltage fluctuation vectors, and combining the historical voltage deviation sequences to obtain a plurality of power fluctuation boundary nodes of the adjacent power supply areas; And acquiring the action time of rated voltage regulating equipment of the power distribution network, screening the power fluctuation boundary nodes based on the historical voltage deviation sequence and the action time of the rated voltage regulating equipment, and determining a plurality of power oscillation boundary nodes of the adjacent power supply area.
5. 5. The method for collaborative control of power distribution network partitions based on boundary node attribution according to claim 4, wherein the obtaining the rated voltage regulating device action time of the power distribution network, screening the power fluctuation boundary nodes based on the historical voltage deviation sequence and the rated voltage regulating device action time, determining a plurality of power fluctuation boundary nodes of the adjacent power supply area, comprises: Determining a plurality of positive voltage deviation peak moments, a plurality of positive voltage deviation peaks, a plurality of negative voltage deviation peak moments and a plurality of negative voltage deviation peaks of each power fluctuation boundary node based on the historical voltage deviation sequence; Determining the oscillation period of each power fluctuation boundary node based on the positive voltage deviation peak time and the negative voltage deviation peak time; Acquiring the action time of rated voltage regulating equipment of the power distribution network, and determining the voltage regulating response result of each power fluctuation boundary node based on the oscillation period and the action time of the rated voltage regulating equipment; Determining the voltage oscillation characteristics of each power fluctuation boundary node based on a plurality of positive voltage deviation peaks and a plurality of negative voltage deviation peaks of each power fluctuation boundary node; and screening the power fluctuation boundary nodes based on the voltage oscillation characteristics and the voltage regulation response results of each power fluctuation boundary node, and determining a plurality of power oscillation boundary nodes of the adjacent power supply area.
6. 6. The method for collaborative control of power distribution network partitioning based on border node attribution according to claim 5, wherein determining the power supply area attribution of each power concussion border node of adjacent power supply areas based on the historical area reconstruction times and historical voltage deviation sequences comprises: Dividing a plurality of power oscillation boundary nodes of the adjacent power supply area based on the history area reconstruction times and a preset area attribution change times threshold value, and determining a plurality of attribution swing boundary nodes and a plurality of non-attribution swing boundary nodes of the adjacent power supply area; based on the power change trend identification of each power supply area at each sampling time, combining a plurality of positive voltage deviation peak time and a plurality of negative voltage deviation peak time of each attributive swing boundary node, and determining the power association degree of each attributive swing boundary node in the adjacent power supply areas; And determining the power supply area attribution of each attribution swing boundary node based on the power association degree, and keeping the power supply area attribution of the non-attribution swing boundary node unchanged so as to determine the power supply area attribution of each power oscillation boundary node of the adjacent power supply areas.
7. 7. The method for collaborative control of power distribution network partitioning based on boundary node attribution according to claim 6, wherein configuring electrical data of each power supply area according to power supply area attribution of each power oscillation boundary node to complete collaborative control of power distribution network partitioning comprises: Dividing each power oscillation boundary node into corresponding power supply areas according to the attribution of the power supply areas of each power oscillation boundary node by taking each power oscillation boundary node as an electrical node corresponding to the power supply areas so as to determine a plurality of electrical nodes of each power supply area; The method comprises the steps of obtaining the electrical distance between any two electrical nodes in each power supply area, and determining the electrical influence weight between any two electrical nodes in each power supply area based on the electrical distance; The sensitivity coefficient of any one of the electrical nodes and any one of the voltage regulating devices in each power supply area is obtained; carrying out weighted summation on the electrical influence weight and the sensitivity weight, and determining the voltage regulation priority of each electrical node in each power supply area; Acquiring rated action delay of each power oscillation boundary node in each power supply area, and determining area action delay parameters of each power oscillation boundary node in each power supply area based on the rated action delay and a pre-acquired voltage regulating equipment action delay sequence; And configuring the electrical data of each power supply area based on the area action delay parameters and the voltage regulation priority to complete the partition cooperative control of the power distribution network.
8. 8. The method for regional collaborative control of a power distribution network based on boundary node affiliation according to claim 7, further comprising, after the regional collaborative control of the power distribution network: Pre-running the power distribution network, and acquiring a pre-running voltage deviation amount sequence, a pre-running region reconstruction frequency and a pre-running voltage regulation command conflict frequency of each attribution swing boundary node in a preset pre-running period; Determining a voltage deviation improvement rate for each of the home swing boundary nodes based on the pre-run voltage deviation amount sequence and the historical voltage deviation amount sequence for each of the home swing boundary nodes; Determining the voltage regulating instruction conflict improvement rate of each attributive swing boundary node based on the pre-operation voltage regulating instruction conflict times of each attributive swing boundary node and the pre-acquired historical line voltage regulating instruction conflict times; Determining an area reconstruction number improvement rate of each home swing boundary node based on the pre-run area reconstruction number and the history area reconstruction number of each home swing boundary node; Carrying out weighted summation on the voltage deviation improvement rate, the voltage regulation command conflict improvement rate and the area reconstruction frequency improvement rate of each attribution swing boundary node, and determining a cooperative control improvement result of each attribution swing boundary node; and determining a partition cooperative control evaluation result of the power distribution network based on the cooperative control improvement result of each attribution swing boundary node.
9. 9. The power distribution network partition cooperative control system based on boundary node attribution is characterized by comprising a cooperative control data acquisition module, a power synchronization damaged critical period determination module, a boundary node screening module, a power supply area attribution determination module and a power distribution network cooperative control module; the cooperative control data acquisition module is used for acquiring active power time sequence curves and photovoltaic injection power data of all power supply areas in the power distribution network, and acquiring historical voltage deviation sequences and historical area reconstruction times of each boundary node of each adjacent power supply area; the power synchronization damaged critical period determining module is used for identifying the power change direction of the adjacent power supply area based on the active power time sequence curve, and determining the power synchronization damaged critical period of the adjacent power supply area based on the power change direction and the photovoltaic injection power data; the boundary node screening module is used for screening the boundary nodes of the adjacent power supply areas based on the power synchronization damaged critical period and the historical voltage deviation sequence, and determining a plurality of power oscillation boundary nodes of the adjacent power supply areas; the power supply area attribution determining module is used for determining the power supply area attribution of each power oscillation boundary node of the adjacent power supply area based on the historical area reconstruction times and the historical voltage deviation sequence; The power distribution network cooperative control module is used for configuring electric data of each power supply area according to the power supply area attribution of each power oscillation boundary node so as to complete regional cooperative control of the power distribution network.
10. 10. The power distribution network partition cooperative control system based on boundary node attribution as set forth in claim 9, wherein the power synchronization damaged critical period determining module comprises a power synchronization damaged critical period determining unit; The power synchronization damaged critical period determining unit is used for performing differential operation on the active power time sequence curve to determine a power variation sequence of each power supply area; determining a power change trend identification of each power supply area at each sampling moment based on the power change quantity sequence; comparing the power change trend identifications of the adjacent power supply areas at each sampling time, and determining the power change direction of the adjacent power supply areas at each sampling time; Determining a critical period of power synchronization impaired for adjacent ones of the power supply regions based on the power variation direction and the photovoltaic injection power data.

Description

Power distribution network partition cooperative control method and system based on boundary node attribution Technical Field The invention belongs to the technical field of power distribution network control processing, and particularly relates to a power distribution network partition cooperative control method and system based on boundary node attribution. Background The stable control of the power distribution network is a key link for guaranteeing the safe and reliable operation of the power system. Along with the high-proportion access of intermittent renewable energy sources such as distributed photovoltaic and the like, the power distribution and voltage fluctuation characteristics of a power distribution network are increasingly complex, and under the background, the regional cooperative control of the power distribution network is an important solution for the control of the power distribution network. The partition cooperative control of the power distribution network refers to dividing the power distribution network into a plurality of relatively independent power supply areas, so that independent control and cooperative control among the power supply areas are performed in each power supply area, and local quick response and global optimal control are realized. In the existing power distribution network partition cooperative control scheme, after a power distribution network is divided into a plurality of power supply areas, a plurality of electrical devices exist on boundaries between adjacent power supply areas, and these electrical devices are generally called boundary nodes in the power distribution network. The power supply area attribution of the boundary node is mostly determined based on the electrical distance, and remains unchanged after the determination. However, in the high-permeability photovoltaic access scene, the electrical characteristics of the power supply areas are continuously changed due to the randomness and the anti-peak regulation characteristics of the photovoltaic output, and the power synchronicity of the adjacent power supply areas is complex and changeable, so that control instructions of boundary nodes belonging to the fixed power areas are in conflict with actual operation conditions, and the accuracy of the regional cooperative control of the power distribution network is severely restricted. Disclosure of Invention The invention aims to provide a power distribution network partition cooperative control method and system based on boundary node attribution, which are used for solving the technical problem of inaccurate power distribution network partition cooperative control in the prior art. In order to solve the technical problems, an embodiment of the present invention provides a method for collaborative control of power distribution network partitions based on boundary node attribution, including: Acquiring active power time sequence curves and photovoltaic injection power data of each power supply area in a power distribution network, and acquiring historical voltage deviation sequences and historical area reconstruction times of each boundary node of each adjacent power supply area; identifying a power change direction of the adjacent power supply region based on the active power timing curve, and determining a power synchronization impaired critical period of the adjacent power supply region based on the power change direction and the photovoltaic injection power data; Screening the boundary nodes of the adjacent power supply areas based on the power synchronization damaged critical period and the historical voltage deviation sequence, and determining a plurality of power oscillation boundary nodes of the adjacent power supply areas; determining the power supply area attribution of each power oscillation boundary node of the adjacent power supply areas based on the historical area reconstruction times and the historical voltage deviation sequences; and configuring the electrical data of each power supply area according to the attribution of the power supply area of each power oscillation boundary node so as to complete the regional cooperative control of the power distribution network. The method comprises the steps of acquiring active power time sequence curves and photovoltaic injection power data of all power supply areas in a multi-dimensional power distribution network, acquiring historical voltage deviation sequences and historical area reconstruction times of each boundary node of adjacent power supply areas, accurately capturing time characteristics of damaged power synchronization among the adjacent power supply areas caused by photovoltaic output fluctuation through power synchronization damaged critical time periods of the adjacent power supply areas of the active power time sequence curves, effectively identifying boundary nodes which generate power oscillation after the power synchronization is damaged according to the power synchronization d