基于系统合环引起的零序电流保护误动事件的分析及防范  

Analysis and Prevention of Zero-sequence Protection Maloperation Events Caused by System Loop Closure

作　　者：赵博识[1] 王迎来 ZHAO Boshi;WANG Yinglai(Energy and Environmental Protection Department of Maanshan Iron and Steel Co.,Ltd.,Maanshan,Anhui 243000,China)

机构地区：[1]马鞍山钢铁股份有限公司能源环保部,安徽马鞍山243000

出　　处：《冶金动力》2022年第4期1-3,共3页Metallurgical Power

摘　　要：分析了马钢能环部北区两起10 kV系统在合环倒负荷时发生10 kV开关零序保护误动事件的原因,并针对多并电缆运行时电流不平衡问题,提出避免零序保护误动的对策及建议。The causes of two zero-sequence protection maloperation events of 10 kV switch in the northern part of Masteel are analyzed, and countermeasures and suggestions to avoid such events are proposed in view of the current imbalance problem when multiple parallel cables are operated.

关 键 词：小电阻接地系统 零序保护 多并电缆 误动 

分 类 号：TM773[电气工程—电力系统及自动化]