Research On Control Technology Of AC Excitation VSCF Doubly-fed Wind Energy Generation System

This paper mainly researches basic theory and key technologies of AC-exited VSCF(variable speed constant frequency) wind power generation.Firstly, it introduces the basic principle of the AC-excited doubly-fed generator VSCF operation,the physical model of doubly-fed inducation generator under the varied coofdinate system is described in detail.Also it introduces the general method of SVPWM,the AC-exited VSCF wind power generation vector control system is realized under the vector control strategy of stator field-orient.With the MATLAB/SIMULINK simulation models of vector control system with its S-function and module library is establised.According to the vector control algorithm and experiment parametors,the simulation model are tested.A fuzzy self-tuning PID controller is designed for AC-exited VSCF wind power generation control system based on PID control and fuzzy adaptive control,the result of simulation shows that the dynamic property is evidently improved.At last,the hardware and software of the vector control system is designed with digtal signal processor.