10kV开关柜接地故障分析与对策

Analysis and Countermeasures on Grounding Fault of 10kV Switchgear

针对一起10kV开关柜接地故障扩大引发的大面积停电事故,分析了10kV中性点不接地系统发生单相接地时对地电容电流的危害,介绍了消弧线圈原理及选择。

In view of the large area power failure caused by the expansion of the grounding fault of 10 kV switchgear,this paper analyzes the risk of line-to-ground capacitive current when single phase grounding occurs in 10 kV neutral-unearthed system,and introduces the principle of arc suppression coil and its selection.