地铁直流牵引供电系统 meaning in English

d.c.traction power supply system for subway

After analyzing several kinds of protection for feeder line in subway dc traction power supply system , it is pointed out in the paper that the phenomena of refusing action and error action can not be avoided with existing protection which can not protect the whole feeder line
摘要分析了地铁直流牵引供电系统中几种常用的馈线保护类型，发现现有的保护方法很难避免跳闸保护拒动或误动现象的发生，并且不能保护馈线的全长。