A systematic approach to controller design for SVC to enhance damping of power system oscillations

This paper describes a systematic approach to design of a supplementary controller for static VAR compensator (SVC) to improve the damping of power system oscillatory modes. This problem is analyzed from the control point of view. The reduced order model of the power system is obtained using Prony identification method; the residue and root locus methods are then used for the controller design and selection of the input signal to the controller. Dynamic simulations were performed to investigate the effect of SVC controller in increasing system small signal stability, as well as increasing the damping of inter-area modes when SVC is used in combination with PSSs under large disturbances.