Abstract

This paper presents an algorithm based on harmonic wavelet transform (HWT) and rule-based decision tree for detection and classification of transmission line faults. The proposed algorithm has been implemented to provide voltage-based protection scheme to transmission line. Voltage recorded at both ends of transmission line has been decomposed using harmonic wavelet transform. Absolute values of output of harmonic wavelet transform based decomposition of voltage signal is taken as fault index and plotted for recognition of faults. Peak values of fault indexes are given as input to rule-based decision tree for classification of faults. The proposed voltage-based scheme proved to be effective in detection and classification of transmission line faults.

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