小电阻接地系统零序电流的选取问题比较  

Comparison of Selection of Zero Sequence Current in Small Resistance Grounding System

作　　者：韩志成 齐俊山 HAN Zhicheng;QI Junshan(Energy Management Center of Xinjiang Hoshine Silicon Industry Co.,Ltd.,Shanshan,Xinjiang 838200,China)

机构地区：[1]新疆合盛硅业能管中心,新疆鄯善838200

出　　处：《冶金动力》2021年第5期12-14,共3页Metallurgical Power

摘　　要：介绍了一起小电阻接地事故,从现场零序保护动作结果进行分析,发现用套管零序互感器时存在零序保护死区的问题,采取自产零序的方法后,消除了零序保护越级动作的问题。A small resistance grounding accident is introduced.Based on the analysis of the on-site zero sequence protection action results,it is found that there is a problem of zero sequence protection dead zone when using bushing zero sequence transformer.After adopting the self-produced zero sequence method,the problem of zero sequence protection over-level action is eliminated.

关 键 词：小电阻接地 零序保护 二次回路 

分 类 号：TM713[电气工程—电力系统及自动化]