The Effect of Fault Resistance on Distance Relaying Application

Abstract

Abstract-The design and behavior of distance relay used for the protection of long transmission line is described in this paper. The relay was simulated using the model language in MATLAB. The operating behavior of the relay was assessed using two different simulated networks with both solid and resistive faults. The data generated by MATLAB S IMULINK describes the voltage and current signals at the relay location both immediately before and during the fault. The data is applied to the relay simulator, which than evaluates whether the impedance trajectory of the fault enters one or more of the operating zones. The results are presented in graphical form using an R-X diagram.