Active power distribution network fault positioning method based on improved particle swarm

Abstract

The invention discloses an active power distribution network fault positioning method based on an improved particle swarm. The method comprises the steps of offline region division and online fault positioning, wherein the step of offline region division comprises the substeps that a network topology structure is formed according to an existing measuring device in a distribution network, power distribution network region static division is performed from the aspects of economy, reliability and risk; 2, considering DG access, a novel evaluation index is built for performing distribution network region dynamic adjustment of the DG access; the step of online fault positioning comprises the substeps that 1, according to fault information of a region boundary node, redundant information processing is performed, and an invalid region is removed; 2, variable optimization is performed on the processed fault information; 3, the improved particle swarm optimization is adopted for performing global fault positioning. According to the region division and the improved particle swarm optimization, positioning of the fault region is achieved, and the fault positioning problem of a power distribution network containing a distributed power source can be efficiently and accurately solved.

Description

technical field [0001] The invention relates to a fault location method for an active distribution network, in particular to a fault location method for an active distribution network based on improved particle swarms. Background technique [0002] At present, my country's transmission line fault location technology has made significant progress, and the location effect is good. However, the access of distributed power generation (DG) makes the distribution network into a network with two-way power flow, and its fault current characteristics are also greatly affected. The change will cause problems such as the inability of the original distribution network fault location scheme and fault recovery technology to adapt. At the same time, due to the lack of measuring devices, incomplete fault information and distortion problems, especially the distortion and lack of fault information brought about by the access of distributed power sources, it has brought great challenges to the ...

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Problems solved by technology

[0003] Purpose of the invention: In view of the fact that a large number of distributed power sources are connected to the distribution network at present, the traditional distribution line fault location method is no longer applicable to the fault area location of the current power grid. The purpose of the present invention is to provide a method for eliminating distributed power Fault location method of active distribution network based on improved particle swarm optimization for access effect and fast and accurate fault location

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