An accurate fault location algorithm for transmission lines with use of two-end unsynchronized measurements

This paper present a novel fault location algorithm for Extra High Voltage transmission lines based on unsynchronized data generated from two-end of the line. Only post-fault currents and voltages at both ends of the line are required to estimate the synchronization angle and the exact distance to fault. First, a mathematical development is presented for estimated the synchronization angle. Then, the fault location is determined for balanced and unbalanced faults. The proposed algorithm is independent of pre-fault measurements data and all fault conditions. The performance evaluation of the proposed algorithm is tested under different fault scenarios using digital simulation through Matlab software. Simulation results indicate the high accuracy of the proposed algorithm.