Doubly-fed Induction Wind Power Control System Research

In recent years,rising oil price has made the human society face two big energy and environmental problems to be solved.So by using renewable and green energy,such as wind, water power and solar energy,as an important clean alternative sources of energy is of great significance for ease the energy of the environmental problems. More people pay attention on it because of the wind prominent advantages.The wind power systems of Doubly-fed type asynchronous generator in the wind generator occupies an important position in the field.The control strategies,further improvement of the system stability and power efficiency have the vital significance.Introduced the wind power industry and wind power technology at home and abroad and the development situation,and points out that must speed up the development of our country wind power industry, improve the wind power technology.Introduced the DFIG wind power technology advantages and realization forms and the basic operation principle.Analyzed the largest wind turbine wind power tracking control principle.Through the deduced doubly-fed induction wind generators of dynamic mathematical model and in the still and the rotating coordinate coordinate transformation model and put forward based on the magnetic field of the direction of the stator directional vector control strategy realize the principle of the power decoupling control.On the basis of the design based on power and the double loop current PI adjuster control plans and strategies.Analyzes the PWM converter net side the synchronization dq mathematical models in coordinate system,Based on stable dc bus voltage and unit power factor of the operation of the double closed loop PI control scheme.Expounded the fuzzy control of the development process and the basic principle.lt analyse the double closed loop control system of fuzzy self-tuning PI controller parameters design method,Establish the fuzzy control rules and online adjust the parameters of the PI controllerOn the above theory to the Matlab simulation,established DFIG power system simulation model,including wind machine, exchange induction motor and double PWM model and through the simulation results prove the proposed control strategy is effective.