Fault Location Method Based on Full Waveform Information for Distribution Networks

2018 Condition Monitoring and Diagnosis (CMD) Pub Date : 2018-09-01 DOI:10.1109/CMD.2018.8535782

Wen Yan, Meng Hailei, Fang Mu, Dai Jindun, L. Yadong

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Abstract

To improve the reliability and sensitivity of fault location in distribution networks, a fault location method based on full waveform information is presented. In this method, the acting features of arc suppression coil and the influence of arc suppression coils parameters on zero sequence voltage and zero sequence current are considered. For grounding faults, the maximum point of the cross-correlation function of the zero sequence voltage of buses and the zero sequence current on each outgoing line is used to select the faulty line, and then the standardized deviation degree of the zero sequence current waveforms when the fault occurs and the corresponding arc suppression coil operates is used to localize the fault. For interphase faults, the three-phase current information before the relay protection device acts is measured to select the faulty line, and then by using standardized deviation degree of the faulty phase current waveforms, the fault is localized. Through the simulations on PSCAD/EMTDC software, the feasibility and reliability of the proposed method are verified.

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基于全波形信息的配电网故障定位方法

为了提高配电网故障定位的可靠性和灵敏度，提出了一种基于全波形信息的配电网故障定位方法。该方法考虑了消弧线圈的作用特性以及消弧线圈参数对零序电压和零序电流的影响。对于接地故障，利用母线零序电压与各出线零序电流相互关函数的最大值来选择故障线路，然后利用故障发生时零序电流波形的标准化偏差程度以及相应消弧线圈运行来定位故障。对于相间故障，通过测量继电保护装置动作前的三相电流信息来选择故障线路，然后利用故障相电流波形的标准化偏差程度进行故障定位。通过在PSCAD/EMTDC软件上的仿真，验证了该方法的可行性和可靠性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2018 Condition Monitoring and Diagnosis (CMD)

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