一起110kV区外故障造成用户双回供电线路开关跳闸的分析

An Aanalysis about Double-circuit Switch Trip Caused by the 110kV External Fault

针对用户110kV母线单相接地故障，造成另一双回110kV供电用户线路开关跳闸的情况，通过现场分析，确认由于零序电流分流，造成区外故障时，保护正确动作，针对这一供电方式，对此提出解决问题的方法．

The fault of single-phase grounding of llOkV bus led to another double 110kV circuit trip. After site analysis, the cause lay in the fact that the zero sequence current shunted,and then led to the erternal fault.