摘要
介绍了一起线路单相永久性故障时因防跳继电器功能失效,引起220 kV断路器失灵保护动作,导致220 kV母联及220 kV I母失压事件。分析了此次事件保护动作过程、断路器偷合及失灵保护动作原因,并根据事件特点提出了防范措施。
A case of 220 kV circuit breaker failed protection action caused by the failure of anti-trip relay during a single-phase permanent fault of the circuit is introduced,which leads to the loss of voltage event of 220 kV busbar and 220 kV I busbar.The protective action process and the causes of circuit breaker closing incident and protection action failure are analyzed,the effective and feasible preventive measures are put forward.
作者
栗磊
LI Lei(Ningxia Electric Power Research Institute,Yinchuan 750002,Ningxia Hui Autonomous Region,China)
出处
《电力安全技术》
2019年第9期34-37,共4页
Electric Safety Technology
关键词
断路器
防跳继电器
失灵保护
circuit breaker
anti-trip relay
failure protection