Abstract
Distance relays should not sense power swing as a fault to further create an unwanted circuit breaker tripping. Wavelet transform is a powerful signal processing tool used by many researchers for detection of faults during power swing condition and unblock power swing blocking function in case of fault during power swing. Due to the natural characteristic of WT, its performance is mostly depending on the selection of proper mother wavelet function as it ensures the optimum performance in processing any signal This paper proposes different wavelet types namely: Battle Lemarie Spline (Piecewise Linear Spline), Beylkin, Daubechies and Symlet for detection of faults during power swing by extracting voltage and current signals. Suitability of each type is commented at the end for cases under study. The proposed algorithm is implemented on a typical parallel transmission line network using MATLAB software.
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