A novel algorithm to determine fault location in a transmission line using PMU measurements

In recent years a lot of research activities on determining fault location in a transmission line using PMU measurements have been done. Most of the methods use voltage and current measurement at one or both the ends of the transmission line. Also many methods consider source side and load side impedance to be known and constant. This paper presents a method for the determination of fault location in a transmission line using synchronized measurements considering the variation in source and load side impedance. The proposed algorithm is valid for symmetrical as well as unsymmetrical faults. This method is also less dependent on Current Transformer, so that error will be less. Algorithm has been tested in various systems-including IEEE 7-bus system-using Real Time Digital Simulation platform. Simulation result on a general two bus system is presented in the paper.