Improvement of power system transient stability using Fault Current Limiter and Thyristor Controlled Braking Resistor

This paper discusses transient stability enhancement using Fault Current Limiter (FCL) and Thyristor Controlled Braking Resistor (TCBR). In the case of a severe fault occurrence in a power system, FCL is used for fault current limiting, transient stability enhancement and reduction of torsional oscillations, and TCBR is used for fast control of generator disturbances. The effect of these two instruments discussed together in a single machine power system, connected to the infinite bus with applying a three phase symmetrical fault. The simulation results show the improvement of transient stability of the power system by using both devices.