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A probabilistic method for detection and location of very high resistive earth faults

机译：一种检测和定位极高电阻接地故障的概率方法

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摘要

A probabilistic method is presented for the detection and location of very high resistive, permanent single-phase earth faults in medium voltage, radial operated distribution networks (20 kV). The systems considered have an unearthed or a compensated neutral and the fault resistance covered are in the range 5220 kΩ. The algorithms of the method are based on the change of the neutral-voltage and zero-sequence currents, measured a the MV sustain and also at the distribution line locations. The feasibility of the method was verified by an analysis based on system data recorded during field tests in real power systems.
机译：提出了一种概率方法，用于在中压，径向运行的配电网络（20 kV）中检测和定位极高电阻的永久性单相接地故障。所考虑的系统具有未接地或已补偿的中性点，覆盖的故障电阻范围为5220kΩ。该方法的算法基于中性电压和零序电流的变化，在MV维持点以及配电线位置也进行了测量。通过在实际电力系统中的现场测试期间记录的系统数据进行分析，验证了该方法的可行性。

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