Abstract：It has been a hot issue for the fault location method in the neutral un-effectively grounded system(NUGS) when a single-phase earth fault occurs. In this paper, we start with the theoretical analysis and the time-frequency domain analysis for the faulty phase current in different level of the feeders, and a novel kind of fault indicator is put forward as well as the corresponding fault location algorithm. In comparison with the fault indicator that already exists, this new method does not rely on the zero-sequence current, and auxiliary hardware is not needed, which shows great feasibility. PSCAD/EMTDC based simulation results indicate that the proposed method is immune to the change of the neutral point characteristics, the fault resistance and the voltage.
童宁,余梦琪,林湘宁,张锐,李正天. 基于相电流高频特征识别的配电网故障指示器原理[J]. 电工技术学报, 2015, 30(12): 465-470.
Tong Ning,Yu Mengqi,Lin Xiangning,Zhang Rui,Li Zhengtian. Study for Fault Indicator Based on the Faulty Phase Current Feature Recognition for the Distribution Network. Transactions of China Electrotechnical Society, 2015, 30(12): 465-470.
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2015, Vol. 30 
