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.
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)
出处
《冶金动力》
2021年第5期12-14,共3页
Metallurgical Power
关键词
小电阻接地
零序保护
二次回路
small resistance grounding
zero sequence protection
secondary circuit
