LMI approach based excitation H∞ controller design for damping of power system oscillations and control of terminal voltage

This paper presents the excitation H-infinity controller design, based on the Linear Matrix Inequality(LMI) approach, which results in damping of power system oscillations and control of terminal voltage simultaneously. The important advantage of LMI based H-infinity design is that the weight selection is more easier than the Riccati based H-infinity design. Damping of power system oscillations and simultaneous control of terminal voltage for single-machine infinite-bus power system is demonstrated through simulation studies. Further, the proposed controller is more robust and resulting in better performance than the conventional controller, AVR and PSS.