Dynamic Modelling and Performance Analysis of a DFIG Wind Energy Conversion System

In recent years, there is a strong trend towards generation of wind power across the globe in geographically suitable areas with a more or less stable wind velocity. However, the erratic nature of wind velocity as a power source is leading to problems of voltage/frequency oscillations and stability in wind energy conversion systems (WECS). Therefore, extensive research is being carried out for efficient and economic production of wind energy and for combating the associated technical issues. This calls for detailed mathematical modeling and software simulation of WECSs integrating all its components, for offline performance analysis and evaluation of different types of wind generators and their response under various wind regimes. This paper presents an integrated dynamic model of a DFIG-based WECS. The mathematical models of wind, rotor and gear and induction generator are simulated and validated using realistic data. The proposed model is also applied for choosing an appropriate WECS for any given wind regime.