The Developing Of General Converter Control System For Wind Power Based On "DSP+FPGA"

The issues of contradiction with environment and the energy become more and moreprominent,as the world’s fastest-growing green renewable energy, wind energy has been the world’sattention,wind energy has been the world’s attention, and grid-connected wind power generation system becomes an important researchdirection. In this paper,Double Fed Induction Generator(DFIG).The study of this paper from two major areas:the basic control strategy and simulation of the Variable Speed Constant Frequency(VSCF) wind power generation,developing experimental platform of DFIG.Firstly the mathematical models of DFIG were deduced in the static reference, brought in rotary two-phase coordinates, the vector control strategy of grid-side converter and rotor-side converter were analyzed and introduced. The complete models of DFIG were built in Matlab/Simulink, did wind power integration, power decoupled control and the Maximum Power Point Tracking(MPPT) experiment.As the focuses of this paper, it has developed general converter control system for wind power based on "DSP+FPGA", thenbriefly described the working mode according to different control object. The specific design of control system was is in detailbased on DFIG, including the hardware design of the control system and control system software development. The hardware design include:circuits designchips selection, PCB layout,weld, debugging,anti-interference measures.The hardware circuit includes control panel of "DSP+FPGA", analog signal transmission circuit, digital signal transmission circuit, faults secure circuit, the control circuit power supply. The software part of the control system includes the DSP control program and the FPGA control program. According to their characters, software part divided into different functional module. The DSP control program mainly includes machine-side and network-side converter control program, serial communication program, fault secure program, etc. The FPGA control program includes interface module, A/D sampling module, PWM generate module, fault secure module, Finally, the software system have been proved by simulations.By combining the hardware and software,the VSCF DFIG experiment platform operated well,the correctness of the control strategy and the rationality of the hardware and software design in this paper were testified, laying the foundation for further research.