Controller performance of variable speed wind driven doubly-fed induction generator

With the advancements in the variable speed system design and control of wind energy systems, the power capturing capability and controller complexity of these systems are increasing in parallel. Doubly fed induction generators (DFIGs) with a partial-scale size back-to-back converter set are among the promising technologies in wind power generation schemes. This paper discusses the controller performance versus scheme complexity for DFIG-based wind turbines. The paper focuses on a simple control scheme to track the optimal power from a variable speed wind energy conversion system. The scheme has been examined under different wind speed profiles. The wind speed, wind turbine, DFIG, and power electronic converters along with their control schemes are implemented in MATLAB/SIMULINK environment. Simulation results show the feasibility and robustness of the presented control scheme for DFIG based wind turbines. Further, the results show that the wind turbine can operate at its optimum energy for a wide range of wind speeds.