A fault location algorithm using estimated local source impedance

A fault location algorithm using estimated local source impedance is proposed in this paper. The method uses data only at the local end and the sequence current distribution factors for more accurate estimation. The proposed algorithm can keep up with the variation of the local source impedance. Therefore, the proposed algorithm especially is valid for a transmission line interconnected to a wind farm that the equivalent source impedance changes continuously. The proposed algorithm is largely insensitive to the variation in fault distance and fault resistance. The test results show a very high accurate performance.