摘要
地铁供电系统中的母联闪络是一种具有一定隐蔽性的严重故障,会导致主变电所的停电和地铁线路的大面积停运。结合一起地铁供电系统停电事故,分析了母联闪络故障的产生机制和闪络故障时系统中零序过流保护大面积误动作的原因,并提出了改进措施。
The flashover fault of bus tie breaker in metro power systems is of invisibility. It can cause power supply failure in main transformer station to lead whole line outage. Based on the analysis of a metro power system blackouts, the general mechanism of bus tie breaker flashover and the causes of zero sequence over-current relay protection malfunction are analyzed. At last, based on the analysis, three improvement suggestions are proposed.
出处
《江苏电机工程》
2014年第1期11-13,共3页
Jiangsu Electrical Engineering
关键词
零序电流保护
供电系统
母联闪络
接地方式
主变电所
zero sequence over-current relay
power supply system
bus tie breaker flashover fault
grounding method
main power station
