THE IMPACT OF STATCOM ON DISTANCE RELAY

Abstract

Abstract – In this paper, the analytical and simulation results of the application of distance relay for the protec-tion of transmission line incorporating Static Synchronous Compensator(STATCOM) are presented. A detailed model of STATCOM and its control is proposed and inte-grated into the transmission system for the purposes of accurately simulating the fault transient. An apparent impedance calculation procedure for transmission line incorporating STATCOM based on the power frequency sequence circuits has been explored. The simulation results show the impact of STATCOM on the distance protection relay during the different fault condition; the influence of location of STATCOM, the setting of STATCOM control parameters and the operation mode of STATCOM are studied as well. The results are presented in relation to a typical 138kV transmission system employing STATCOM.