The Research Of The Doubly-fed Wind Power Generator Vector Control

As the fossil energy’s mining excessily, to the environment, it has a great impact on the ecosystem, it needs a new kind of energy, as a substitute for fossil energy now. The abundant wind of nature, belong to clean energy, has got everyone’s attention. In wind power systems, wind motor is one of the important part of the study of wind motor, it will improve the efficiency of wind power generation system. This article mainly discusses the doubly-fed induction motor power tracking control problem.The paper analyzes the development status of wind power at home and abroad, analyzes the mechanism of wind turbine, analyses the basic principle of doubly-fed induction motor, and based on the mathematical model of three-phase static coordinate system is established, through coordinate transformation, the mathematical model of three-phase static coordinate system transformation to the mathematical model of two-phase synchronous rotating coordinate system to simplify the model.The paper uses the method of stator flux vector control. When the condition is more complex, the conventional PI parameters can’t according to the specific environment setting, based on this, this article on the basis of conventional vector control system of wind power, in the control system of the conventional power loop and current loop, respectively, to join the fuzzy controller, the fuzzy controller combined with PI controller, to achieve the purpose of the revised PI parameters, control the output power of the doubly-fed induction motor. it can smooth the net, and tracking the reference power quickly.Through MATLAB simulation, the improved system compared with the conventional vector control system, solved the conventional vector control system of random changes in the environment under the condition of PI parameters to follow environmental change adjustment problems, the improved system has better robustness, verify the feasibility of control system.