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首页> 外文期刊>Electric power systems research >All shunt fault location including cross-country and evolving faults in transmission lines without fault type classification
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All shunt fault location including cross-country and evolving faults in transmission lines without fault type classification

机译：所有分路故障位置，包括没有故障类型分类的输电线路中的越野和不断发展的故障

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摘要

This paper presents a fault location algorithm which does not need to classify the fault type before location estimation unlike some fault location methods. All types of shunt fault including the cross-country and evolving faults can be located and also faulty phase can be identified with this scheme. Cross-country fault is defined as earth fault occurring in different phases of same circuit at different location at same or different time. Further evolving faults are faults beginning in one phase and spreading to another phase after a few cycles. Finding the exact location of cross-country faults and evolving faults is not easy because the first involves faults at two different locations and the later involves change in type of fault after few cycles. The standard deviation of approximate DWT coefficients of three phase currents and voltages measured at one terminal of the line are used as input to proposed ANN algorithm. The simulation results show the efficacy and suitability of the proposed scheme under wide variety of fault situation and the percentage error in fault location estimation using the proposed scheme is within +/- 1% in most of the cases. The distinct advantage of the proposed scheme is that it accurately locates all the normal shunt faults, cross-country faults and evolving faults, which has not been dealt by other researchers simultaneously. (C) 2015 Elsevier B.V. All rights reserved.
机译：本文提出了一种故障定位算法，与某些故障定位方法不同，该算法无需在定位估计之前就对故障类型进行分类。可以定位所有类型的并联故障，包括越野故障和发展中的故障，并且可以使用此方案识别故障相位。越野故障是指在同一电路的不同相中，在同一地点或同一时间发生在同一电路的不同相中的接地故障。进一步发展的断层是从一个阶段开始并在几个周期后扩展到另一阶段的断层。要找到越野故障和演化中的故障的确切位置并不容易，因为前者涉及两个不同位置的故障，而后者涉及经过几个周期的故障类型变化。三相电流的近似DWT系数的标准偏差和在线路的一端测得的电压被用作拟议的ANN算法的输入。仿真结果表明，该方案在多种故障情况下的有效性和适用性，并且在大多数情况下，使用该方案估计故障位置的百分比误差在+/- 1％以内。该方案的显着优势在于，它可以准确地定位所有正常的并联故障，越野故障和发展中的故障，而其他研究人员并未同时进行处理。 （C）2015 Elsevier B.V.保留所有权利。

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