New technique for fault location in interconnected networks using phasor measurement unit

Abstract

Application of PMU for fault location is conducted through a driven algorithm and is applied to different study systems through computer numerical simulation.The algorithm estimates the fault location based on synchronized phasors from both ends of the transmission line whether phase measurement units are installed to both ends or to only one end and the other end is calculated from synchronized phasors from another side. This algorithm allows for accurate estimation of fault location irrespective of fault resistance, load currents, and source impedance. A computer simulation using PSCAD program of the transmission line under study with various fault types and different locations is carried out. A transformation modal is used in the algorithm. Different fault types are simulated with different fault locations to more than one line in the Egyptian network, which has phase measurement units installed according to a selected allocating technique. The results obtained from applying the considered technique shows high levels of accuracy in locating the fault of different faults types. Hence, it is strongly recommended to use the PMU in the Egyptian Network.