Detection of fault location on transmission systems using Wavelet transform

This paper presents a new method to detect fault location accurately on a transmission line. In the proposed algorithm of travelling wave theory to calculate time between fault point and relay location is used in high frequency which this transients analysis by efficient wavelet transform are variable unlike Fourier transform in the multiple accuracy of time–frequency transform. Considering the relation between forward and backward traveling waves and polarity variations of them can be located the fault. In this paper, first, the concept of Wavelet transform and traveling waves theorem are introduced and in the following, characteristics of multilevel analyzing in the time and frequency domain are described. Then, an algorithm based on Wavelet transform is presented for fault detection in the high voltage transmission lines. In the following, this algorithm is executed on a transmission line that simulation results is presented for single line to ground and phase to phase faults in different places.

کلیدواژه ها:

Detection of fault location ، Transmission lines ، travelling wave theory ، Wavelet transform