Model predictive control with fast computation to balance DC-link capacitor voltage and reduced switching frequency for 3L-NPC rectifiers

In the paper, 3L-MPC algorithm with fast calculation is proposed to control many objectives such as unit power factor, capacitor voltage balance and switching frequency reduction. In addition, the outer PI controller is used to adjust the DC-bus voltage. The simulation results demonstrated the excellent performance of the proposed method, both in transient and steady states.