Research On A New Type Of Wind Turbine

The development of green energy in the country to vigorously advocate today, research of new renewable energy alternative to fossil energy is receiving more and more attention, and can effectively solve the human face of the energy crisis. Wind power has developed rapidly because of its clean and other advantages, in particular, has a positive effect on the haze weather, is one of the great potential of new energy.The wind turbine to run directly connected, but because the wind is random, intermittent characteristics, the whole wind turbine off grid or grid will have a great impact on the grid, resulting in decreased power quality, it is also a major problem of wind power grid faces.Fan of the double fed VSCF generator is the most widely used. The brushless doubly fed generator is a kind of variable speed constant frequency double fed generator, its own no brush, no slip ring, no guide pole, low maintenance costs gradually by the industry recognition, and because the power characteristics of the variable speed constant frequency, can affect the maximum extent to reduce the change of the power generated by the wind. The brushless doubly fed generator as the research object, through the establishment of mathematical model, using the direct torque control method for analysis and Simulation of its characteristics.First of all, the wind power generation technology and the development of the status quo of generator is introduced in detail, and introduces the advantages and development of brushless doubly fed generator, present research situation at home and abroad.Secondly, the structure principle and energy transform brush with analysis model of doubly fed generator generator unit without, brushless doubly fed generator and changes in wind speed conditions, by changing the parameters of converter to change the stator control winding output frequency, so as to ensure the power winding side power frequency and power, to constant frequency power state. The establishment of mathematical model, the rotor d-q coordinates data simulated by MATLAB/Simulink software, verify the correctness of the model, for the use of direct torque control for brushless doubly fed motor control to lay the foundation.Finally, a BDFM direct torque control system using MATLAB/Simulink software model, simulation analysis is carried out in changing wind speed conditions, by changing the flux and torque system model, to ensure the system run speed constant frequency changes in wind speed, stability and control has high ability to regulate, get ready for the motor used in the field of the actual wind power.