A simple model predictive controller of a three-phase PWM AC/DC converter

This paper proposes a simple model predictive inner-loop current controller for regulating the output voltage of a three-phase voltage-source AC/DC converter under the two-loop strategy. The solution of the MPC can be given analytically by minimizing an energy function of the tracking error, and its global stability is guaranteed in the presence of the input constraint. For the outer-loop, a PI controller is utilized to regulate the output voltage without offset error. The simulation results show that the current and the output voltage regulation are achieved in a satisfactory manner despite the load and the parameter changes.