A Random Switching Frequency De-Re- Coupling Current MPC Method for Single-Phase MC

Abstract

Model predictive control (MPC) is a highlighted control method for power electronic realm. For Matrix Converter (MC) with bidirectional switches and difficulty model, MPC has a complex structure and control process. A random switching frequency de-re-coupling current MPC method is proposed in this paper for a single-phase MC. A voltage function is obtained by the simplified and decoupled discrete-time model of MC, and a random switching frequency generating strategy is inserted to modulate function and to improve harmonic of MPC variable switching frequency. The principle effectiveness and advantages of the proposed method such as THD, settling times and static errors are verified by simulation results comparing with the conventional MPC and de-recoupling fixed switching frequency current MPC methods.