Three-phase PFC Circuit Research Based On DSP

The low power factor of three-phase AC/DC converter will bring a lot of harm to powergrid and other electric equipment, low power factor and harmonic pollution problem hasaroused more and more attention. In order to meet the standard and reduce harmonic reactivecomponent, the international on a variety of high power factor rectifier scheme is proposed.Three-phase PFC technology can well solve these problems, so the study of three-phase PFCtopology, algorithms and other technical is becoming a hot spot of current research at homeand abroad.This thesis research work is based on DSP digital control of three-phase PFC topologies,sampling algorithm and control algorithm for some useful research. Concrete contents are asfollows: first of all, the basic concept of power factor correction technique, developmentsituation and the commonly used control method was introduced in detail, and analyzes thecurrently existing limitations of various three-phase PFC topologies and their respectiveadvantages; second choice in the Boost phase six switch voltage type PWM rectifier as theresearch object, study its mathematical model and numerical control strategy, elaborate how toestablish simulation model, and algorithm simulation results, finally realizes the space vectordigital control of three-phase PFC technology in the application of three-phase voltage sourcePWM rectifier; Finally developed based on DSP control of three-phase voltage source PWMrectifier PFC power supply prototype, the simulation and experimental results are given, andits comparative analysis.Bright spot are studied in this paper: The YXDSP-F2812development board developedby Yanxu company adopted TMS320F2812chip of TI company, So it has the advantages ofDSP high speed digital signal processing; dq in the main circuit mathematical modelestablishment and the research, based on the grid voltage feed-forward decoupling controlalgorithm, and current so as to realize three-phase PFC digital SVPWM control strategy, andin Matlab7.0Simulink interactive simulation integration environment again and again, to thewhole system simulation, to verify the feasibility of the control strategy and its algorithm.