A precise PMU based fault location method for multi terminal transmission line using voltage and current measurement

Abstract

This paper presents a fault location algorithm for single phase to ground faults on three terminal transmission lines. The conventional fault location methods, using one-terminal ac voltage and current are not applicable to the multi-terminal systems. So, the indication of the faulted section and fault distance estimation is performed by using three-phase current and voltage of the terminal at which a fault locator is installed. The delivered fault-location algorithm consists of three subroutines designated for three types of fault. A MATLAB-SIMULINK simulator is used to demonstrate the performance of the proposed fault locator. The result of simulation verifies the high accuracy of fault location with various fault resistances and locations.