Improvement on Single-Ended Traveling Wave Based Fault Location Through Singular Point Detection

doi:10.11930/j.issn.1004-9649.2013.9.71.3

Abstract

Abstract: The single-ended traveling wave based fault location became the focus of study due to the feature that it is not subject to communication constraints. Through wavelet transforming, the first wave head can be located precisely. But, in complex circuits, the second reflected wave will decay rapidly due to superimposed waveforms and cross transmission waves, which leads to the decrease of measuring accuracy. In this paper, based on the analysis of refraction-reflection law for different impedance line, the extraction of traveling waves and wavelet transformation, the method of averaging processing for the transformed second wave to improve the measuring accuracy is proposed. An improved scheme of traveling wave based fault location using single end electric parameters is established and simulation is performed in Matlab. The results show that, compared with the modulus maxima method, the updated averaging processing can significantly improve the fault location accuracy. The correctness and effectiveness of the new scheme are proved.

Key words: fault location, reverse traveling wave, mutation detection, averaging

CLC Number:

TM773

XIN Chao-shan, LI Feng-ting. Improvement on Single-Ended Traveling Wave Based Fault Location Through Singular Point Detection[J]. Electric Power, 2013, 46(9): 71-74.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.9.71.3

https://www.electricpower.com.cn/EN/Y2013/V46/I9/71

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