变电站站用直流系统接地现象及辨识

Identification of DC System Grounding Fault in Substations

文章首先简要分析了直流系统的重要性及发生直流接地的危害,系统地模拟了不同类型直流接地故障,分析了不同类型直流接地故障的异同点。通过对不同类型直流接地的分析,找出辨识接地类型的方法。最后总结了直流接地期间的相关要求,为现场人员提供了有效的直流接地故障排查思路。

This paper first gives a brief analysis of the importance of DC system and the harm of DC grounding,simulates various types of DC grounding faults and analyzes the similarities and differences.Through analysis,the paper finds out ways of identifying different types of DC grounding faults.Finally,it summarizes the related requirements during the DC grounding,which provides effective troubleshooting ideas for the field personnel.