Design And Application Of Model Predictive Control In VIENNA Rectifier

Power electronic devices are widely used in the power industry which plays an important role in the whole industrial system.However,these power electronic devices result in serious harmonic pollution problems.Harnessing the grid harmonic pollution is the key to improve the power factor of power electronic devices and reduce current total harmonic distortion rate.A Three-level rectifier topology with fewer switching elements,high power factor,less current harmonics and lower voltage stress of switching elements,VIENNA rectifier has high research significance and broad application prospects in related researches.This paper introduces the VIENNA rectifier topology,its working principle and detailed mathematical model.The control theories of SVPWM control strategy and DC current control strategy have been introduced and the basic working principle of model predictive control strategy is analyzed.A control algorithm based on predictive model of VIENNA rectifier's state equation has been proposed.According to the control theories and modulation schemes of SVPWM control,direct current control,model predictive control in VIENNA rectifier,the corresponding simulation circuits are built in MATLAB Simulink environment.The validity and feasibility of the model predictive control strategy and the characteristics of the model predictive control have been verified and obtained through a comparison with the simulation results of the other two control strategies.This paper also gives the main parameters design,hardware circuit design,and software program flow chart design of the test prototype.According to the design of the program,a corresponding test prototype is prepared.The experimental results shows that the SVPWM control strategy and the direct current control strategy are feasible.The subsequent improvement methods to realize the model predictive control strategy in practice are given.