| The conventional rectifier section widely consists of diode-rectifier circuit and phase-control thyristor rectifier, which injects large amounts of harmonics into the power networks and produces much contamination. With the fast developing technology of green energy, an ever-enhanced attention has been focused to the PWM rectifier in the field of power electronics. The three-phase of PWM voltage source rectifier owns such features as constant output voltage and running under unit power factor. This paper mainly focused on the research of direct current control strategy of PWM voltage source rectifier, and did some relatively work about the quick current control.First of all, this paper analyzes the theory of PWM rectifier in detail, including the topology, working principles and working state. The direct current control strategy is classified and researched. Constructing the high and low-frequency mathematical model under three-phase stationary reference frame, two-phase stationary reference frame and two-phase rotation reference frame. Then, we research the space vector PWM strategy of three-phase PWM rectifier, and improve two aspects including sector judging and time of the vector working. This paper puts forward a new control scheme to improve active current transient response rate by utilizing the reactive current in transient state. Finally, the hard system is designed on the basic of TMS320LF2407 and IPM model and the parameters design of inductance and capacitance wad presented. After emulating on the soft of MATLAB/SIMULINK, the emulation result indicates that the system current has fast response and good dynamic and static capability. |
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