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.
Highlights
In the long-distance transmission system, T-connection transmission lines are a mode of connection which is a higher transport power and heavier load
One: inject the signal in one end of the circuit; How to cite this paper: Wen, P.G., Song, H., Guo, Z.T. and Pan, Q. (2015) Study on Fault Location in the T-Connection Transmission Lines Based on Wavelet Transform
After doing the simulation research by MATLAB, the results show that this method can confirm the fault branch judgment and fault distance
Summary
In the long-distance transmission system, T-connection transmission lines are a mode of connection which is a higher transport power and heavier load. This method has great difficulties of processing data, and the traveling wave in the process of transmission will weaken the signal; the return time of signal is inaccurate [1]. Second method is to use wavelet energy to determine the fault slip, but traveling wave in T line weakens seriously; if the reflected wave calculation error is too large, there are difficulties in the locating [2]. The new proposed algorithm has the following advantages: using the voltage traveling wave, eliminating the effects of electrical traveling waves, selecting the appropriate wavelet transform applied to deal with the traveling wave signal [4], to calculate the time of the traveling wave reaches the three-terminal, and to select the appropriate algorithm by the distance of different transmission line. According to the MATLAB simulation study carried out by this method, the results showed that this method can be determined accurately by judging the distance of the fault and the fault branch
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