| At the present the energy source is less and environment pollution is becoming more and more serious day by day, renewable energy source becomes more important for the sustainable development of human beings.With its strong points the wind power is specially paid close attention to by human beings and the technology of wind power is developed by many countries all over the world.This thesis generally introduces home and abroard's current situation of wind power research,introduces the property of wind power and theory of doubly-fed machine.Analysis the working theory and energy balance relationship of alternating excitation wind power generation.Based on these theories this thesis also designe the main circuit of control system.Design a pwm transducer with energy flow in both ways . Analysis fundamental principle and mathematical model of three-phase voltage svpwm rectifier to propose a control proposal.Prove this control proposal could satisfy need of alternating excitation wind power generation by simulink.By researching of CLARK and PARK translation,This thesis also propose a control proposal base on the stator-flux-oriented.Analysis the adjustment of power factor of alternating excitation wind power generation.Contains synchronization,simulink of active power and reactive power.The result proved the control proposal is perfect.Based on the target system and TMS320LF2407A DSP, write the svpwm control program with C Programming Languages and assembly language to achive the contrl of transducer.This program also lay the foundation of Variable-speed and Constant-frequency System'control research in the future. |
