共用接地极引起站内接地网过流保护76SG动作事件分析及防控  

Analysis and Prevention of 76SG Action Event by Overcurrent Protection of Grounding Grid in Station Caused by Common Grounding Electrode

作　　者：陈蔚东 CHEN Weidong(Guangzhou Bureau,EHV Power Transmission Company,CSG,Guangzhou 510405,China)

机构地区：[1]南方电网超高压输电公司广州局,广东广州510405

出　　处：《电工技术》2020年第15期130-131,共2页Electric Engineering

摘　　要：某换流站在一次单极大地回线方式转单极金属回线方式过程中站内接地网过流保护76SG动作,分析保护动作原因,并提出防控措施与解决办法,对消除共用接地极隐患具有重要参考意义。76SG was action by a grounding grid overcurrent protection in a station during a single-maximum return line mode conversion to a single-pole metal return line mode.The cause of protection action was analyzed,and the prevention and control measures and solutions were put forward,which had important reference significance for eliminating the hidden danger of the common grounding electrode.

关 键 词：共用接地极 站内接地网 过流保护76SG 限流电阻 

分 类 号：TM771[电气工程—电力系统及自动化]