基于小波分析的地下电缆故障定位仿真研究

doi:10.16180/j.cnki.issn1007-7820.2019.09.013

Abstract

Abstract:

Aiming at the difficulty of pulse signal recognition in power cable traveling wave fault location, the method of wavelet analysis was applied to the identification of traveling wave signals in power cables was proposed. PSCAD/EMTDC software was used to build an accurate simulation model, and the Daubechies wavelet in MATLAB was utilized to perform 5-layer wavelet decomposition on the simulated waveform. The simulation results showed that the wavelet analysis could be used to analyze the fault signal with full frequency range, which significantly improved the fault location accuracy of the cable. In a certain distance range, the relative error could be effectively controlled below 0.5%.

Key words: power cable, traveling wave, wavelet analysis, PSCAD/EMTDC, fault location, full frequency band

CLC Number:

TP806

TANG Yang,LI Junhao,XIONG Shuangju,XIE Shiyu,WANG Jinfeng. Simulation Research on Fault Location of Underground Cable Based on Wavelet Analysis[J].Electronic Science and Technology, 2019, 32(9): 60-64.

Figures/Tables 9

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References 17

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类型	设置值
导体电阻率/Ω·m	1.7×10^-8
绝缘层相对介电常数	2.3
绝缘层相对磁导率/Ω·m	5.5
电缆埋设深度/m	10

故障距离/m	测量距离/m	测量误差/%
1 500	1 505.84	0.389
2 000	2 008.25	0.413
3 000	3 012.66	0.422

Simulation Research on Fault Location of Underground Cable Based on Wavelet Analysis

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