Robustness and performance of a multi-objective Model Predictive Static Var Compensator controller

Abstract

This paper presents the robustness and performance study of a wide-area multi-objective optimization based Model Predictive Control (MPC) strategy for Static Var Compensator (SVC). Many MPC control strategies presented in the literature have been based on single-objective optimization and focused merely on damping of the electromechanical oscillations. In this paper, the MPC controller is designed both for the oscillation damping and voltage control using multi-objective optimization approach. With this approach, the controller can improve the system stability in various operating conditions where either the damping or voltage stability is more important. The performance of the proposed MPC controller is compared with a local SVC controller using nonlinear time domain simulations. A simplified model of the power system in the Northern parts of Finland and Norway is used. The conducted study indicated that the proposed MPC controller could improve the system stability in varying operating conditions.