A robust passivity based model predictive control for buck converter suppling constant power load

In this paper, the instability problem caused by constant power load in Buck converter is addressed. order to solve problem, a composite controller proposed. Due double loop structure of controller, passivity based control (PBC) adopted voltage track reference and make system stable, while simplified continuous set model predictive (CCS-MPC) selected as current reference. Moreover, improve robustness avoid static error output, high disturbance observer (HODO) designed out compensate negative effects uncertainty. Then, mixed potential theory large signal stability analysis conducted investigate studied system. verify proposed method, MATLAB simulation, OPAL-RT hardware rapid prototype experiments are conducted.