以下为句子列表：
英文: 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
中文: 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。
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