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This paper presents a technique for classification of faults on single circuit transmission line using Wavelet Multiresolution Analysis.EMTP (Microtran) is used to perform simulations which generate time domain input signal on a 400KV, 300km transmission line fed from one end. Daubechies eight (D-8)wavelet transforms of the three phase currents on a transmission line fed from one end are used for fault analysis in this work. The summation of the 1 level output of MRA detail signals of current in each phase extracted from the original signals generated are employed in fault classification algorithm. Simulation results show that the proposed method is effective and simple and give accurate results irrespective of fault location, fault inception angle and fault impedance.

Classification of Faults on Transmission lines using EMTP and Wavelet Multiresolution Analysis