Model predictive current control of third-harmonic injection two-stage matrix converter

This paper proposes a sample model predictive current control strategy for the third-harmonic injection two-stage matrix converter (3TSMC). The discrete-time model of 3TSMC is used to predict the future behavior for every feasible switching state. The control method chooses the optimal switching state that minimizes the cost functions, for rectifier and inverter. The model predictive current control consists of two parts. One is to produce sinusoidal three-phase input currents, and the other is to obtain high quality output currents. Besides, this control strategy guaranty good dynamic performance. Compared with the conventional PI current control method, the current quality has significantly improved by applying proposed approach. The feasibility of the proposed method is verified through simulation.