COMPARISON OF GA AND LQR TUNING OF STATIC VAR COMPENSATOR FOR DAMPING OSCILLATIONS

Static VAR Compensator (SVC) is added to the excitation system of a generator in order to enhance damping during low frequency oscillations. In this article Linear Quadratic Regulator (LQR) tuning approach and Genetic Algorithm (GA) are used to obtain supplementary controller parameters for oscillation damping. The performances of SVC without controller, SVC with LQR controller and SVC with GA controller are compared. Eleven bus two area four machine system is used for the study. The performance of the GA controller is found to be better than the LQR controller and without controller under different operating conditions. A comparison between the effect of SVC alone and the proposed GA and LQR is made.