Systematic Design of Improved Lead-Lag Direct Power Model Predictive Controller for Multilevel Active-Front-End Rectifier: A Comparative Study

In this paper, the systematic design procedure of the proposed lead-lag direct power model predictive controller ((LDP)-D-2-MPC) for active-front-end (AFE) rectifier is presented. First, the parametric design procedure of the linear proportional-integrator (PI) and lead-lag controllers are described. Then, in the lead-lag control system, the inner-loop current controller is replaced by the non-linear DP-MPC controller to form the proposed (LDP)-D-2-MPC. Moreover, a comparative study between four designed controllers including the PI, lead-lag, PI-DP-MPC, and the proposed (LDP)-D-2-MPC is performed from various aspects. All of the controllers are applied to the three-level active-neutral-point-clamped (3L-ANPC) AFE rectifier to evaluate the performance of each controller. The presented simulation results verify the performance, feasibility, and superiority of the proposed (LDP)-D-2-MPC over the PI, lead-lag, and PI-DP-MPC methods.