Stochastic tracking controller for maximum power point tracking in wind energy conversion system

This paper discusses the rotor speed tracking loop configuration in maximum power point tracking (MPPT) in wind energy conversion system (WECS). A new loop configuration is proposed in which the aerodynamic torque is treated as an external disturbance. Internal model control and minimum variance control are used to achieve full disturbance rejection and exact reference tracking. Provided simulation results compare the performance of the proposed controller and the traditional (PI) controller with different wind profiles and reference speed trajectory patterns. A tradeoff between tracking performance and overall wind farm power quality is discussed and a solution is proposed.