With expanding constantly on MV network, the current of the one-phase grounding increases constantly too, when one-phase grounding fault happens, there are more accidents in the lines and substations.
中压电网不断扩大的同时，系统的单相接地电流也快速增加，发生故障时送电线路和变电站事故较多。
The phase comparison between fault feeder and healthy feeder is one of important criteria in fault line selection for neutral non-effective grounding systems.
小电流接地系统发生单相接地故障时，故障线路与健全线路在特征频段内零序电流的相位差别是接地选线判据的重要依据之一。
The phase comparison between fault feeder and healthy feeder is one of important criteria in fault line selection for neutral non-effective grounding systems.
小电流接地系统发生单相接地故障时，故障线路与健全线路在特征频段内零序电流的相位差别是接地选线判据的重要依据之一。
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