Research on Fault Location Method of GIS Busbar Based on Fault Current Distribution

随着采用气体绝缘开关设备(即GIS设备)的变电站越来越多，对于GIS母线发生故障后快速隔离故障能力的要求也越来越高，而目前采用的SF6微水测试法受外部影响较大，费时费力且无法快速定位到故障点。本文针对以上问题，根据某电力调度单位基于故障电流分布研发的GIS母线故障定位软件，研究了其故障定位原理及当GIS母线发生故障时采取的措施，并提出了存在的问题及改进的思路。 The requirement of the capability of isolating faults rapidly after GIS busbar faults happen is en-hanced due to the increasing number of the gas insulated switchgears (GIS equipment) which are used in the substation. However SF6 micro-water test method so far is greatly influenced by external environment, which is time-consuming and cannot locate to the point of failure quickly. Therefore, we research on the principle of faults location and the measures that we take when GIS busbar failure occurs, and propose the existing problems and the ideas for improvement, according to the software for locating the GIS busbar faults developed by a power dispatching unit based on the analysis of fault current distribution in this paper.