Analysis of TCSC Performance in Modified IEEE 9 Bus System Using Distance Relay

This paper presents an analysis of the Thyristor Controlled Series Capacitor (TCSC) effect on a modified IEEE 9 bus system (CPRI) using a distance relay. The TCSC is a device used to control the power flow in transmission lines by varying its reactance. The modified IEEE 9 bus system is used to simulate the power system and to evaluate the performance of the TCSC. The transmission cable is isolated from errors by the distance relay. The simulation’s findings demonstrate the TCSC’s capacity to efficiently regulate power flow and raise system voltage stability. The distance relay provides reliable protection to the transmission line against faults. It is for improving the power quality of the network; therefore, its impact on protection has been analyzed in this article. EMTDC/PSCAD is used to simulate different fault types at distinct locations with and without TCSC, using inductive modes ($\alpha$=35 degrees) of TCSC working. An MHO relay is used to identify under-reach and over-reach incidents.