Multi-overlapping decentralized connective stabilization based on dynamic output feedback for interconnected power systems with netted structure

Multi-overlapping decentralized stabilization problem based on dynamic output feedback is studied for a class of interconnected power systems with netted topological structure in this paper. According to Inclusion Principle of large-scale systems, the multi-overlapping structure decomposition process is carried on. The interconnected power system is decomposed into a series of pair-wise subsystems in the expanded space. The dynamic output feedback controllers of these pair-wise subsystems are designed, and then they are contracted back to the original space. Multi-overlapping decentralized control of the interconnected power systems is achieved. And the sufficient condition for stability and connective stability of the power systems and corresponding controller design method are obtained by using Lyapunov theory and LMI approach. Finally, the proposed method is applied to AGC control design of the interconnected power system. Simulation results show the feasibility and superiority of the method.