通过对龙洞水电站二号机组出现的单相接地保护误动的实地分析、检验和排除，进一步探讨总结出中性点不接地系统单相接地故障的现象判断和处理方法。
Based on the analysis on the misoperation of single-phase earthing fault of 2 # unit of Longdong hydroplant , a summary on judging the single-phase earthing in isolated neutral point system and eliminating measures is described .
龙洞站