220kV双母线断路器失灵保护的几点改进  

Improvement of 220 kV double-bus circuit breaker malfunction protection

作　　者：罗志平[1] 熊迪[1] 吴祖文[1] 刘艳荣[1] 

机构地区：[1]湖南省电力公司超高压管理局,湖南长沙410015

出　　处：《继电器》2008年第11期67-70,共4页Relay

摘　　要：在目前220 kV双母线接线的母线断路器失灵保护的设计中,存在以下几种特殊情况,即:线路故障时线路断路器失灵后分别出现主变断路器、母联断路器及出线断路器再失灵的连环失灵特殊情况,并分析了现场实践中存在的问题及改进措施,另外还提出目前存在母线或母联死区故障时母联失灵保护沿用典型设计存在的问题,列举了可以取消母联失灵外部启动回路的必要性。In current design of 220 kV double bus circuit breaker malfunction protection, there＇re several special situation, such as malfunction of transformer breaker, bus-coupler breaker and outlet breaker appear continually after line breaker malfunction in line failure. This paper analyses problems existing in practice and corresponding improvement measures, points out the problem of adopting typical design for bus coupler malfunction protection when bus-bar or bus-coupler dead zone fault exists presently, and also enumerates the necessity of canceling external starting loop in bus-coupler malfunction.

关 键 词：断路器失灵 母联失灵 母差 

分 类 号：TM773[电气工程—电力系统及自动化]