500 kV线路两相相继雷击跳闸的原因分析

摘要

针对某500 kV线路发生两相相继雷击跳闸的故障，以线路保护动作情况和故障录波图为依据，分析了断路器三相跳闸的原因，并阐述了线路故障跳闸后如何在第一时间快速判断与查找线路故障。最终，通过对线路故障原因的分析，总结出线路发生两相相继故障时的现象，从而为现场运行人员迅速判断线路故障性质及采取措施提供依据，避免了事故范围的进一步扩大，保障电网安全稳定运行。%Lightening trippings of a 500 kV two-phase transmission line occurred in succession. According to the situation of line protection action and fault recording,the reason of three-phase breaker tripping was analysed,and it is elaborated how to judge and find the line fault as soon as possible after the line trip. Finally,through analysis on the line fault causes,the phenomenon of the line two-phase successive trip fault is summarized,which provides basis for field staff to quickly judge the property of line fault and take measures so as to avoid the fault turning for the worse and ensure the security and stability of the grid operation.