A parameter compensation FCS-MPC-based temperature balance control method for rectifier

Aiming at the problems of DC voltage unbalance, grid side power factor not close to unity power factor and temperature unbalance between insulated-gate bipolar transistors (IGBTs), a parameter compensation finite control set model predictive control-based (FCS-MPC) temperature balance control method for single-phase three-level neutral point clamped (3L-NPC) rectifier is proposed in this paper. The parameter compensation FCS-MPC method can achieve parameter online compensation and improve unity power factor under the condition of model parameter mismatch. Meanwhile, the energy loss prediction model of IGBTs is established to realize the temperature balance of rectifier. Compared with the traditional transient current control method, the proposed method can improve the grid side current harmonics and unity power factor, and solve the problem of temperature unbalance. The method proposed in this paper is tested on Simulink, and the simulation results show the effectiveness of the compensation and temperature balance.