Study on Fault Location in the T-Connection Transmission Lines Based on Wavelet Transform

Penggao Wen, Hong Song, Zhiting Guo, Quan Pan

School of Automation and Electronic Information, Sichuan University of Science & Engineering, Zigong, China.

DOI: 10.4236/wjet.2015.33012                

Abstract

The results of T-Line Traveling Wave Fault Location is easily influenced by the wave arrival time and traveling wave propagation velocity; it proposes that the traveling wave uses wavelet transform to extract the modulus maxima of breakdown voltage, to confirm the time of the traveling wave reaching the three-terminal line. The speed of the traveling wave reaching three terminals is confirmed by the structural parameters of the transmission line. We apply the arrival time and propagation velocity to the T-type traveling wave fault location algorithm. Different transmission line distance select the corresponding algorithm, excluding the impact of fault branches and in some cases ranging accuracy, the failure dead zone will not appear. After MATLAB simulation analysis, the algorithm analysis is clear; the range accuracy is high, so that it can meet the requirements of fault location.

Keywords

Wavelet Transform, T-Connection Line, Traveling Wave Fault, Traveling Wave Fault Location

Conflicts of Interest

The authors declare no conflicts of interest.

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