Integrated Mechanical and Electrical DFIG Wind Turbine Model Development

This paper focuses mainly on the development of a completed typical doubly fed induction generator (DFIG) wind turbine model. It includes the interaction between mechanical and electrical parts. In the mechanical part, the aerodynamic of the wind turbine blade was analyzed by the XFOIL. With the properties of the blade, the model was established by the fatigue, aerodynamics, structures, and turbulence (FAST) in the MATLAB/Simulink. The DFIG electrical model was constructed by using mathematical equations in MATLAB/Simulink that integrates with the FAST. In the DFIG, the space vector is applied in the ac machine to represent the flux, voltage, and current magnitudes. The grid-side converter stabilized the voltage at the dc bus, and the rotor-side inverter directly controls the electric torque in the generator. Currently, most research articles model the mechanical and the electrical parts of the wind turbine separately. In this paper, both systems were discussed in detail and integrated into a complete model for the DFIG-based wind turbine system.