PSO based robust power system stabilizer design using mixed sensitivity based H output-feedback control in LMI approach

Power system stabilizer (PSS) is extensively used to enhance the angular stability by providing damping to the generator's oscillation. An electric torque is enforced in the rotor shaft in phase with the speed variation to provide this damping. In this paper a PSO based Robust Power System Stabilizer (RPSS) design has been proposed depending upon mixed sensitivity based H output feedback control in linear matrix inequality (LMI) framework. In this approach, PSO based norm minimization technique is applied for weighting function and controller parameter selection. In controller parameter selection, H∞/H2 multi objective control has been proposed. The efficacy of the RPSS, designed through approach has been investigated by simulation of a single machine associated with infinite bus scheme for various loading conditions employing MATLAB.