Nonlinear control of wind power generation systems

This paper proposes a nonlinear control design technique for wind generation systems that deals with both active power and reactive power at the same time in consideration of the fact that the wind generation system is a high order nonlinear dynamical system. Unlike the existing controller designs, the proposed technique is developed based on original nonlinear models of electric machine and wind turbine, and does not use any linear assumption. In addition to the desired reactive power control, the proposed controller also regulates the active power output in either maximum power tracking mode or power regulation mode. The effectiveness of the controller is demonstrated through simulation.