Decentralized robust guaranteed cost control for multimachine power systems

In this paper, we investigate the problem of the decentralized robust stabilizing control approach and mainly the decentralized robust guaranteed cost control for robust stabilization of interconnected multimachine power systems. The proposed feedback control schemes are developed to ensure the asymptotic stability of the nonlinear uncertain large scale system and formulated in a minimization problem within the framework of linear matrix inequalities (LMIs) which resolution yields the decentralized control gain matrices. The effectiveness of the proposed control techniques are demonstrated through numerical simulations on a nonlinear uncertain power system with three interconnected machines, for different cases of perturbations.