Research And Design Of Three-Phase Voltage-Source Bidirectional PWM Rectifier

Modern power electronics have been widely used in the power and other industryareas. Pulse Width Modulation (PWM) rectifier can restrain harmonic and operate underthe condition of unit power factor. It can also achieve the purpose of bidirectional powerflow, so it has broad application prospect. This thesis focused on the three-phasevoltage-source bidirectional PWM rectifier.The analysis and design of the control circuit of the rectifier is given based on theanalysis of main circuit structure and the mathematical model. Include the analysis ofcurrent control, the implement of space vector pulse width modulation and the design ofvoltage loop and current loop. In addition, grid voltage synchronization technology is alsoanalysed. The detailed design scheme of main circuit parameters is given based on systemmodel and the requirement of transient and steady state performance. Such as the designof DC bus voltage, AC side inductor and DC capacitor. According to different controlmethods, implementations of AC voltage sensorless technique are given, includeconventional DPC(Direct Power Control), VF-DPC(Virtual Flux based DPC), AC voltagesensorless VOC(Voltage Orientation Control), AC voltage sensorless VFOC(Virtual FluxOrientation Control). A DPC method based space vector modulation is given aftersynthesizing the advantages of the above methods.Be aimed at the problem discussed above, the simulation platforms of rectifier areconstructed based on Matlab/Simulink software. The results of simulation experimentsverify the above theory and illustrate the application of these methods.