发电厂直流系统接地故障分析与处理

Analysis and Treatment of Grounding Fault in Power Plant DC System

现阶段的直流系统包括了两套直流电源,但直流系统的运行较为复杂,在运行过程中可能会受到绝缘老化、检修等因素的影响,导致接地故障的问题发生。介绍了发电厂直流系统接地的概念以及危害,分析了发电厂直流系统接地故障的类型及原因,研究了发电厂直流系统接地点查找的方法以及发电厂直流系统接地故障处理的建议,以供同行业人员进行参考。

At present,the DC system includes two sets of DC power supplies,but the operation of the DC system is relatively complex,which may be affected by insulation aging,maintenance and other factors during the operation,leading to the occurrence of grounding fault.This paper introduces the concept and harm of DC system grounding in power plants,analyzes on the types and causes of DC system grounding faults in power plants,studies on the methods for finding the DC system grounding points in power plants,and puts forward some suggestions for handling the DC system grounding faults in power plants,which can be used as a reference for people in the same industry.