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Topology Identification Method of AC Distribution Network Based on Breadth First Search Algorithm

A technology of breadth-first search and distribution network topology, which is applied in the field of distribution network to achieve the effect of high identification accuracy

Active Publication Date: 2022-07-01
BEIJING JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for identifying the topology of an AC distribution network based on a breadth-first search algorithm to solve the defects in the existing technical problems

Method used

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  • Topology Identification Method of AC Distribution Network Based on Breadth First Search Algorithm
  • Topology Identification Method of AC Distribution Network Based on Breadth First Search Algorithm
  • Topology Identification Method of AC Distribution Network Based on Breadth First Search Algorithm

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Experimental program
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Embodiment

[0027] figure 1 A schematic flowchart of an AC distribution network topology identification method based on a breadth-first search algorithm provided in this embodiment, refer to figure 1 The method includes:

[0028] S1 collects the voltage, current and power values ​​of each node (network branch node and load node) by setting measurement points at the transformer outlet and node of the AC distribution network, and calculates the power of each node according to the collected power value. Change the increment value.

[0029] In an AC distribution network with a tree topology, the number of nodes N is counted, a topological connection matrix H with dimension N×N is constructed, and each value in the matrix is ​​initialized to 0.

[0030] S2 sorts the collected power values ​​and voltage values ​​respectively to obtain a node power vector and a node voltage vector, and selects the node with the largest power value in the node power vector as an initial node.

[0031] Sort the...

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Abstract

The invention provides an AC distribution network topology identification method based on a breadth-first search algorithm, which includes collecting the measured values ​​of voltage, current and power of each node, calculating the power change increment of each node; The maximum power node is the initial node; calculate the voltage correlation coefficient between all nodes and the initial node, adopt the search principle of breadth first, and select the node with large correlation coefficient to form the adjacent node candidate set; in the adjacent node candidate set, the node power The change increment and the sum of the current are the judgment basis, search for the node directly connected to the initial node, select the network branch node as the initial node, and repeat the iteration until all the nodes are searched and their connection relationship is determined, stop the search algorithm , to obtain the AC distribution network topology. The topology identification of the AC distribution network can be accurately performed, and the method is simple.

Description

technical field [0001] The invention relates to the technical field of distribution networks, in particular to a topology identification method of an AC distribution network based on a breadth-first search algorithm. Background technique [0002] As the link between the transmission network and users, the distribution network is the last link of power production and supply, and is directly connected to the users. The distribution network contains a large number of feeders and nodes with numerous devices and complex structures. In order to achieve optimal economic operation and rapid power supply recovery after a fault, the topology of the distribution network changes frequently. Due to the large-scale access of distributed energy sources such as distributed power sources, energy storage systems and controllable loads to the power grid, more uncertainties are introduced, and the operation and control methods of the power distribution network are more complicated, and topology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06F30/18G06F16/2455G06F113/04
CPCH02J3/00G06F30/18G06F16/2455H02J2203/20G06F2113/04
Inventor 罗国敏刘雯琳刘春秀程梦晓李永赞阿拉木莎房牧姜云曹清涛王志强李龙潭
Owner BEIJING JIAOTONG UNIV