On account of the weak fault current and unstable fault arc, the problems of the single phase to ground fault line selection in the non-solid earthed network have never been thoroughly resolved.
由于故障电流小、电弧不稳定等原因，小电流接地系统单相故障选线问题始终没有得到彻底解决。
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。
A new method based on calculating approximate entropy of transient zero-module current is presented in order to locate the single phase grounding fault in non-solidly earthed network.
提出一种通过计算暂态零模电流近似熵确定小电流接地故障区段的新方法。
Combined with the research status of single-phase-to-ground fault locating for small current grounding system, a new idea based on non-fault-phase transient current is presented.
针对小电流接地系统单相接地故障定位的研究现状，提出基于非故障相暂态电流的单相接地故障定位的思想。
In this paper, the method based on the combination of wavelet transform and BP neural network is presented to realize fault location for the single-phase-to-earth fault in non-direct-ground systems.
提出一种基于小波变换与BP神经网络相结合的方法来实现小电流接地系统单相接地故障定位。
The healthy line is unloaded for zero-sequence component when a single-phase fault occurs in a non-solid earthed network.
小电流接地系统发生单相接地故障时，对零序分量而言，非故障线路相当于空载。
When single-phase-to-earth fault occurs on a neutral non-direct grounded power system, it is nexessary for improving the reliability of power supplying to select the faulted line quickly.
中性点非有效接地配电网发生单相接地故障时，尽快选出故障线路对提高电网的供电可靠性有重要意义。
A faulty feeder selector based on traveling wave theory and IEC61850 standard is developed for the single-phase grounding fault of digital substation in non-solid grounding power system.
基于故障行波理论和IEC61850标准，研制了中性点非有效接地系统数字化变电站中的单相接地故障行波选线装置。
A faulty feeder selector based on traveling wave theory and IEC61850 standard is developed for the single-phase grounding fault of digital substation in non-solid grounding power system.
基于故障行波理论和IEC61850标准，研制了中性点非有效接地系统数字化变电站中的单相接地故障行波选线装置。
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