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AC power distribution network topology identification method 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 and wide application

Active Publication Date: 2021-02-09
BEIJING JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • AC power distribution network topology identification method based on breadth-first search algorithm
  • AC power distribution network topology identification method based on breadth-first search algorithm
  • AC power distribution network topology identification method based on breadth-first search algorithm

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Embodiment

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

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

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

[0030] S2 respectively sorts the collected power values ​​and voltage values ​​to obtain node power vectors and node voltage vectors, and selects the node with the largest power value in the node power vect...

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Abstract

The invention provides an AC power distribution network topology identification method based on a breadth-first search algorithm, and the method comprises the steps: collecting the voltage, current and power measurement values of each node, and calculating the power change increment of each node; sorting according to the power, and selecting a maximum power node as an initial node; calculating voltage correlation coefficients of all nodes and the initial node, and selecting nodes with large correlation coefficients to form an adjacent node alternative set by adopting a breadth-first search principle; searching nodes directly connected with the initial node in the adjacent node alternative set by taking the node power change increment and the current sum as judgment bases, selecting networkbranch nodes as the initial nodes, repeating iteration until all the nodes are searched and the connection relationship is determined, stopping the search algorithm, and obtaining the AC power distribution network topology. Topology identification of the AC power 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 an AC distribution network topology identification method 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 users. The quality of distribution network construction directly affects the quality of electricity used by customers. The distribution network contains a large number of feeders and nodes, a large number of equipment, and a complex structure. In order to achieve optimal economic operation and quickly restore power supply 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 intr...

Claims

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Application Information

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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
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