The Research Of The PWM Rectifier Which Based On Fuzzy SVPWM And Its Implementation On DSP

With the increasing aggravation of energy crisis and environment pollution, theresearch on intermittent power sources which used of solar energy or wind energyemerges around the World. The three phase voltage source PWM rectifier based onPWM modulation plays an irreplaceable role in intermittent power sources. Three phasevoltage source PWM rectifier has advantages of simple structure, high power factor,low harmonic and adjustable output voltage, which makes it more and more widelyused in DC Source, inverter, wind power generation system and so on. This paper takesthe PWM rectifier in wind power system as the research object, whose main researchwork is as follows:Firstly, we introduce the math model in three-phase static reference frameaccording to the topology of the main circuit in the PWM rectifier which in wind powersystem；after Clarke and Park operation we obtain the model of the wind power PWMrectifier under two-phase rotator reference frame.Secondly, the current feed forward compensation was introduced to decouple thethree-phase system. The current model which was decoupled can separate to control onthe active and inactive current.Thirdly, According to the characteristics of wind power system PWM rectifiercircuit and the influence on the system characteristics by the classic PID control, wecombine both fuzzy control technology and PID control technology to replace thevoltage loop in double closed loop, and analyze the SVPWM modulation technologyand synthetic method in detail.Fourthly, we establish the whole system based on Simulink in Matlab, and analyzethe simulation operation in various states to guide the hardware and software design inthe whole system.At last, we design the the experiment platform and the control algorithm to debugthe whole system based on DSP TMS320F28027.The experimental results show that the PWM rectifier which we designed in wind power system has well control performance, and achieves the expected designpurpose.And this paper guides the development of the PWM rectifier in wind powersystem.