Improvement of Power System Transient Stability Using TCVR and TCPAR, a Comparative Study

This paper examines the effects of Thyristor Controlled Voltage Regulator (TCVR) and Thyristor Controlled Phase Angle Regulator (TCPAR) on the transient stability improvement of a multi-machine power system. The proposed control strategy is proposed to supply a supplementary control signal to both FACTS devices to increase the Critical Clearing Time (CCT). To show the effectiveness of the dynamic oscillation, the criterion of relative rotor angles, using Runge-Kutta method is used to demonstrate that the proposed TCVR and TCPAR controllers significantly improves the dynamic performance of the power system. The effectiveness of the proposed method is tested on the WSCC3 nine-bus system applied to the case of three-phase short circuit fault in one transmission line. The simulation results and their comparison are presented in this paper. Copyright (c) 2011 Praise Worthy Prize S.r.l. - All rights reserved