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Control of variable-speed wind turbines: standard and adaptive techniques for maximizing energy capture

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4 Author(s)
K. E. Johnson ; Div. of Eng., Colorado Sch. of Mines, Golden, CO, USA ; L. Y. Pao ; M. J. Balas ; L. J. Fingersh

This article considers an adaptive control scheme previously developed for region 2 control of a variable speed wind turbine. In this paper, the question of theoretical stability of the torque controller is addressed, showing that the rotor speed is asymptotically stable under the torque control law in the constant wind speed input case and L2 stable with respect to time-varying wind input. Further, a method is derived for selecting γΔM in the gain adaptation law to guarantee convergence of the adaptive gain M to its optimal value M*.

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IEEE Control Systems  (Volume:26 ,  Issue: 3 )