Robust decentralized Power System Stabilizer for multi-machine power system using reduced order observer designed by the duality to sliding surface design

This paper presents design of robust decentralized Power System Stabilizer (PSS) for multi-machine power system using reduced order observer designed by the duality to sliding surface design. Firstly, the discrete-time sliding surface is designed and then by the duality principle the discrete-time reduced order observer for the PSS of multi-machines is configured. The novelty of the method is that the observer and the controller both are designed simultaneously using the same sliding surface. The performance of the proposed robust decentralized PSSs are investigated under different loading conditions and disturbances. The simulation results are presented to show the efficacy of the proposed method.