一起220kV线路CVT二次接地缺陷的发现及原理分析

Discovery and Principle Analysis of the Grounding Fault of Secondary Circuit of A 220kV Line CVT

结合一起220k V线路CVT停电检修试验实例,通过原理分析,发现并解决了其存在二次刀闸拉开之后二次侧无接地点的缺陷。总结出应在设备投运前的验收阶段及现场例行停电检修阶段,加强对CVT二次接地状况检查的重要性及措施。

According to a case of maintenance and test after the outage of a 200 kV line CVT, by using principle analysis, discovery and settlement of the fault of no grounding point is made when the secondary circuit switch-disconnector is broken. It is important to check up the grounding of the secondary circuit of the CVT which is either in acceptance or outage stage for maintenance. The measures to check up the grounding of the secondary circuit of the CVT are concluded in this paper.