Robust Overlapping Decentralized Control for Multi-area Power Systems with Radial Structure

The problem of robust overlapping decentralized control for a class of multi-area power system with radial structure are discussed in this paper. Based on its own structure information a new control method is presented, which can improve the robust decentralized control performance of the radial structure interconnected power system. In the method, the special overlapping decomposition process is carried on for the radial structure based on the restriction conditions of inclusion principle at first. Then the robust decentralized controllers are designed by means of linear matrix inequality (LMI) approach. The proposed method is applied to AGC of a four-area radial structure power system, and the simulation results show that the performances of the controllers designed by proposed method are better than the one by LMI approach directly