Modeling And Control Of The Double Driver Wind Turbine

With the development of society and the fossil energy increasingly scarce, it has become a strategic choice to accelerate the development and utilization of the renewable energy for human to solve the problems of living. Wind power as a kind of clean and renewable resource, has brought worldwide attention. In nowadays wind power generation technology, Variable Speed Constant Frequency wind power technology and Variable Pitch Control technology become the mainstream wind power technology and has a very good prospects of development. Based on the existing six systems of Variable Speed Constant Frequency wind power, this research puts forward a new type of the double-driver wind systems.As a new variable speed constant frequency wind generator, the double-driver wind turbine has the originate design, the system remove the increaser gearbox and converter, just control the pitch angle, which can realize the active adjustment and reactive control, improve the system reliability, reduce cost and easier to maintain.This research content mainly includes:(1) Analyzing structure and working principle of the double-driver wind turbine, according to the theory of coordinate transformation, deducing mathematical model of the double-driver wind turbine in the dq0 coordinate, doing simulation research with MATLAB/Simulink to testify the validity of the model.(2) From steady state equivalent circuit of the Double-driver wind turbine, discussing the power characteristic of the motor, analyzing the motor's internal energy flow relationship, through the simulation to get motor active, reactive power curve, and determining the stable and safe operation area of the Double-driver wind turbine.(3) Designing a adaptive fuzzy controller, regulating the pitch angle of vice rotor, make sure the speed of vice rotor coordinate the speed changes of main rotor , remain the output frequency 50Hz, realize variable speed constant frequency control of the generator.