摘要
介绍一起地铁供电系统电缆单相短路故障,通过对保护动作、短路电流、电流测量、接地系统的全面分析,逐一明确保护拒动、保护误动、短路电流突变等故障原因,使存在的问题得以及时解决。
A single-phase cable fault of ring network 35 kV cables occurred in subway power supply system. Through a comprehensive analysis for protection of action, short-circuit current, current measurement and grounding system, the reasons for the fault of protection refusal-to-move, protection maloperation and short-circuit current mutation were revealed one after another, so that problems were solved in time.
出处
《都市快轨交通》
2009年第6期90-93,共4页
Urban Rapid Rail Transit
关键词
地铁供电系统
35
kV环网
短路
保护
电流互感器
接地小电阻
subway
power supply system
35 kV ring network
short circuit
protection
current transformer
low resistance grounding
