变电站小电流接地选线系统的改造及应用

Improvement and Application on Substation of Line Selection for Small Current Grounding System

介绍了冷坑110k V变电站6k V小电流接地选线系统的现状,以及运行时存在的问题,提出了如何有针对性地处理和解决方案,防止系统非故障设备长时间处于电压升高状态,进而引发多相接地短路,通过对小电流接地选线系统进行改造及新型小电流接地选线装置的应用,提高判断接地故障线路的准确率,从而实现线路的安全、可靠、稳定运行。

The current situation of 1 10kV substation 6kV line selection for small current grounding system cooling pit is introduced. For the problems existed when operating, the handing methods and solve scheme are put forward, to prevent the system non fault equipment in increasing voltage state for a long time, causing muhiphase grounding short circuit. Based on the improvement of line selection for small current grounding system and the application on new model small current grounding line selection device, the accuracy of judging earth fault line is improved, and the safe, reliable and stable operation is realized for the line.