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An Approach for Detecting and Locating Evolving Faults on Transmission Lines Based on Transient Traveling Waves

机译:基于暂态行波的输电线路演化故障检测与定位方法

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摘要

There has not been a satisfactory solution to identifying and locating evolving faults on transmission lines until now. This paper presents an integrated detection and location approach for evolving faults based on transient traveling waves. Evolving faults include two sequential faults, resulting in the change of fault phase. The feature aerial mode of captured current traveling wave only reflects the feature of the second fault occurrence, and is used for analyzing the second fault. By combining traveling wave and transient energy features, fault phase selection can be implemented at two stages: the initial fault occurrence, and the short period before fault clearance. The evolving faults can be determined according to the consistency of the two-stage phase-selection results. Subsequently, the positions of the two successive faults can be precisely acquired by individually implementing the double-ended traveling wave fault location on the initial fault phase as well as the feature aerial mode currents, respectively. Digital simulation studies based on the simulation software PSCAD/EMTDC demonstrate that the proposed method is feasible and effective.
机译:到目前为止,还没有令人满意的解决方案来识别和定位传输线上不断发展的故障。本文提出了一种基于瞬态行波的演化故障综合检测与定位方法。不断发展的故障包括两个连续的故障,导致故障相位的变化。捕获的当前行波的特征航模仅反映第二次故障发生的特征,用于分析第二次故障。通过结合行波和瞬态能量特征,可以在两个阶段中进行故障相位选择:初始故障发生和故障清除前的短时间。可以根据两阶段选相结果的一致性确定发展中的故障。随后,通过分别在初始故障阶段分别实现双端行波故障定位以及特征航模电流,可以精确地获取两个连续故障的位置。基于仿真软件PSCAD / EMTDC的数字仿真研究表明,该方法是可行和有效的。

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