远离发电机端（无限大电源容量的）网络发生短路，判定依据为以电源容量为基准的计算电抗的标幺值Xc>=3时，即可视为远端短路。
计算远端短路故障电流时，必须考虑轨道暂态电气参数的变化。
Calculating Remote short circuit fault current, one must consider that the electrical parameters vary with current.
短路故障模型的仿真结果表明机车起动电流和远端短路电流的相似会对直流馈线保护造成影响。
Short-circuit fault model simulation results show that the locomotive starting current is similar to the remote short-circuit current will affect the DC line protection.
该方法有效地避开了列车启动电流的影响，不但可以迅速切除近端的短路故障，而且通过延时跳闸还可以切除远端短路故障。
The nearby fault can be cleared immediately while the distant fault can be cleared with a delay by using the proposed method which will not be influenced by the starting current of trains.
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