H_2/H_∞ guaranteed cost control of excitation system

In the paper,the design of excitation controller for single-machine infinite-bus power system based on H_2/H_∞ guaranteed cost control theory and direct feedback linearization is presented.The robust control model with uncertain parameters is established.The H_2/H_∞ control rule is obtained by MATLAB/LMI toolbox.The analysis demonstrates the control method possesses good adaptability and robustness.It can improve the stability of the power system and satisfy the requirement of voltage regulation accurary.