葛洲坝220kV开关站葛陈线线路保护动作行为分析

Operation analysis of the line protection in Ge-Chen line of 220 kV Gezhouba switchyard

2003年8月24日,葛洲坝220kV开关站葛陈线发生C相瞬时接地故障,线路没有进行重合而直接三相跳闸。该文先简单介绍了葛陈线故障发生时系统的运行工况和各侧线路保护的动作情况,然后通过系列的推导和相关的试验,全面分析了葛陈线两侧线路保护装置在此次线路故障中的动作行为。

Ge-Chen line was out-of-operation in 220 kV Gezhouba switchyard on August 24, 2003 for a short circuit of single-phase earth fault. This paper introduces the system condition and relay operation when the fault occured. The maloperation of relay protection at both sides of Ge-Chen line is analysed in detail with a series of derivations and experiment.