Fixed speed wind turbine generator model validation and dynamic simulation using Matlab/Simulink

In the last two decades an increasing amount of electricity has been generated from renewable sources in order to mitigate the environmental impact of the conventional power plants. In the next future wind turbines may affect the behaviour of electrical power system. This paper describes the model of a typical fixed speed wind turbine connected to the grid; the model is developed in the simulation tool Matlab/Simulink. It’s composed by the aerodynamic system, the shaft model (two-mass system), the induction generator (fifth order model) and the stall control system of the wind turbine rotor. The validation of the wind turbine model is made in steady-state operation, and the results are verified by field measurements made on an Italian wind farm. The model is sufficiently accurate to be used for transient stability investigation. Dynamic simulations will be carried out for evaluating the dynamic operation of the wind turbine when a disturbance occurs in the grid and for studying the participation of wind farm to system regulations.