Model predictive control of three-phase PWM rectifier

This article takes three-phase voltage source PWM rectifiers as study object. Based on the analysis of model predictive control principles, an optimized switch sequence model predictive control strategy (OSS-MPC) was proposed, so as to solves the issues of unfixed switch frequency and large system computation in traditional MPC. Based on multi vector synthesis, the optimal vector sequence combination of adjacent sampling periods is selected to achieve fixed switching frequency control and decrease grid side current harmonics. A simulation experiment was conducted. This method has been proven to have good dynamic property. At the same time, it can obviously enhance the current harmonic distribution on the power grid side of the system, further verifying the effectiveness and superiority of this scheme.