This project is design based on the paper "Differential relaying scheme for a tapped transmission line connecting UPFC and wind farm" and presents a differential relaying scheme for a tapped transmission line in presence of Unified Power Flow Controller (UPFC) and wind-farm together. The process starts at retrieving the fault current signal at the respective busses connecting the lines involving fault and pre-processing it using multi-resolution based Wavelet transform to derive third level approximate coefficients (CA3). Further, the Discrete Fourier Transform (DFT) is used to compute the RMS value of the signal from the reconstructed signals expressed in terms of Wavelet approximate coefficients. Once the RMS value of the signal is estimated the operating (tripping) and restraining signals are computed for fault detection and classification in transmission lines including UPFC and wind-farm.

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