VSC based STATCOM controller for damping multi-mode oscillations

Various nonlinear control techniques have been applied in power system control. The performance of nonlinear controllers is influenced by the parameter uncertainty and external disturbance. This paper will present a novel approach of robust variable structure control (VSC) based static synchronous compensator (STATCOM) controller design for damping multi-mode electrical-mechanic oscillations. The designed controllers can provide significant damping to both local mode and inter-area mode oscillations. Robust performance of the proposed controller in the SMIB and three-area power system is demonstrated by computer simulation.