Model Predictive Virtual Flux Control Method for Three-phase AFE Rectifiers Robust Against Supply Harmonics and Unbalance

Active front end (AFE) rectifier has been widely used for making high quality, little distorted sinusoidal input currents in several conditions. If appropriate control schemes are applied to AFE rectifier, respectable high performance is able to be realized. In this paper, the explanation of MP-VFC method was exhibited, and the performance comparisons of the four control methods which are MP-VFC (Virtual Flux Control), MP-CC (Current Control), MP-DPC (Direct Power Control), and MP-VFDPC (Virtual Flux Direct Power Control), were proceeded under several conditions, which are input voltage unbalance, input voltage distorted by fifth and seventh harmonic components. In summary, on the basis of the results of the experiments, the MP-VFC method shows excellent performance compared to the other three methods for input voltage distortion and unbalance.