Research on Three-Phase PWM Rectifier Based on Improved Model Predictive Direct Power Control

For the three-phase PWM rectifier under the conventional model predictive direct power control, the accuracy of the prediction objective function is not precise, and problems such as large fluctuations in the predicted power and DC side output voltage. This paper presents a novel optimization method, which uses lagrangian interpolation to optimize the model's predicted power. At the same time, fuzzy adaptive control is used to adjust the active power reference value of the voltage outer loop. Finally, the SVPWM technology is applied to control the switching of the power tube. The simulation results show that the optimized system has a stellar performance and the strong robustness of the system in transient state.