500kV断路器重合后分闸时间长原因分析及其对策

Reason Analysis of Low Opening Speed of 500 k V Breaker and Its Countermeasures

针对500 k V站发生的一起线路单相永久性故障,根据保护录波图,分析断路器动作行为不正常,结合断路器液压机构分闸操作原理以及现场断路器开合特性试验数据等方面进行分析,查找出原因并制定了应对措施。

A single phase permanent fault occurred in a 500 kV station was analyzed. The breaker was found to be abnormal with the help of recorded diagram. Combined with the switching principle of the hydraulic mechanism of breaker and the data of breaker switching test, the fault causes were identified and countermeasures were proposed.