Transmission Line Fault Location Using Two-Terminal Data Without Time Synchronization

This letter presents a new transmission line fault location method that uses current and voltage sinusoidal phasors at both ends, without necessity of data synchronization. The main difference among the classical Johns method resides in the fact that the proposed method is based on magnitude of fault point voltage and does not demand exact phase angles of the acquired signals. Simulated and real case results are presented, showing that the proposed algorithm is robust, accurate, and provides adequate performance. Practical applications confirm that the synchronization is not really necessary, making the method faster and easier to apply than classical methods in many real situations