Research On Control Technology Of Converter For Permanent Magnet Direct-driven Wind Turbine System

China’s wind power generation industry actually started in recent years. Converter, especially high voltage high power converter, are still relied on importing in our country. Therefore, that the own intellectual property right of the converter control technology can be mastered is significant for the development of our country’s wind power generation career. Permanent magnet direct-drive wind power generation has become the main developing direction of our country’s wind power generation, for the high efficiency, high reliability, the low cost of the operation and the maintenance, the excellent grid access capacity and some other advantages. The paper adopts double converter topology to study respectively control strategy of the motor side and the nets side.First of all, the paper sets forth the important significance of developing the renewable energy in China and the important position of the wind power generation, indicating our country’s wind power generation will open the new phases of the medium and small, the offshore wind power and the distributed generation. Then the paper introduces the current status and the trend of the wind power generation technology, the developing speed of the direct-drive wind power, the full power and the converted technique.Secondly, analyze the vector control technology and voltage space vector pulse width modulation. Introduce the development of the vector control, vector control coordinate transformation and the voltage space vector pulse width modulation technology. According to the mathematical model of the permanent magnet synchronous generator, under the coordinating system of the dq two-phase rotation, adopting the inner current loop, the speed outer loop and the PI regulator to achieve permanent magnet synchronous motor rotor magnetic field oriented vector control.Thirdly, for the deficiencies of classic PI regulator, ADRC technology used in the speed control of machine side PMSG, to achieve fast response of motor speed overshoot, adaptive speed adaptability, excellent resistance to torque disturbances, and not sensitive to the system mechanical and electrical parameters. In addition, utilize tracking differentiator arrangements for transition process, reduce system initial error. Increase PI regulator parameters to keep the fast speed response, and motor speed fast response, small overshoot, and strong robustness. Arranging transition process by tracking differentiator is simple structure, to retain the advantages of classic PI control, the control parameters are easy tuning.Fourthly, the distributed generation system should have independent power generation and grid capacity of the two kinds of power pattern. Establishing the mathematical model by the inverter system of two kinds of the generation modes, the classic PI regulator, the application of engineering design methods, to establish a simulation model in MATLAB2009a/Simulink.Finally, introduce some of the work carried out in the laboratory, taking advantage of TMS320F2812controlling chip to make the design of the hardware circuit and software, focusing on the SVPWM algorithm implementation of TMS320F2812.