Design of robust power system stabilizer using mixed sensitivity based H∞ output-feedback control in LMI framework

This paper presents the design of robust power system stabilizer (PSS)for damping low frequency oscillations. The proposed damping controller design is formulated as mixed sensitivity based H_∞ output-feedback control with pole placement constraints. The synthesis problem can be formulated into a standard linear matrix in equalities (LMIs) framework which can be tractable numerically. A single generator, 3-bus system is used to demonstrate the effective ness and robustness of the designed controller at different system operating conditions. The MATLAB simulation result shows good damping and robustness.