FS-MPC Algorithm with Enhanced Reference Tracking and Fixed Switching Frequency for Vienna Rectifier based EV Chargers

The Vienna rectifier is a desirable topology for electric vehicle (EV) and more-electric aircraft (MEA) applications, however it has complicated control requirements. In order to reduce the input current distortion while maintaining a fixed switching frequency (FSF), a finite set model predictive control (FS-MPC) algorithm with a modified cost function is developed in this paper. To account for parameter uncertainties and tracking error, a moving average (MA) term is added to the cost function. The proposed control scheme guarantees the following features: 1) constant switching frequency; 2) improved current THD; 3) absence of a weighing factor in the cost function; and 4) strengthened system against parametric uncertainties. The proposed MA-based FSF FS-MPC algorithm is validated in simulation.