一起800kV罐式断路器绝缘故障判断分析

Analysis on insulation fault judgement of 800 kV tank-type circuit breaker

针对黄河变电站设备运行过程中发生的一起800 kV罐式断路器绝缘故障,通过现场试验及解体检查等方法进行分析,找出了故障发生的原因。分析结果表明:断路器盆式绝缘子根部存在残留异物或凝露,导致运行中放电击穿,是造成断路器绝缘故障的根本原因。

Aiming at a insulation fault of 800 kV tank-type station, through the locale test and disassembly check, finds circuit breaker in Huanghe River Sub- out the faults causes of circuit breaker. The analysis result shows that the root of basin-type insulator of ,circuit breaker exist residuum or condensation bringing on it discharge breakdown in operation is the basic reason of the circuit breaker insulation fault.