STATCOM controller design for power system stabilization with sub-optimal control and strip pole assignment

Abstract

This paper solves the problem of power system stabilization by using the advanced static VAR compensator (STATCOM) to increase the damping of the electromechanical and exciter modes of the power system. The dynamic oscillations are repressed by the proposed STATCOM controller, which is designed using a two-level optimization output feedback control and the strip poles assignment method. The linear quadratic regulator method does not require pre-specified weighting matrices. The two output feedback control schemes, designed using the direct and minimum error excitation methods, respectively, are compared. To show the effectiveness of the dynamic oscillation suppression, eigenvalue analysis and nonlinear simulation were used to demonstrate that the proposed STATCOM controller significantly improves the dynamic performance of the power system.