Periodic Disturbance Accommodating Control for Blade Load Mitigation in Wind Turbines

[+] Author and Article Information
Karl A. Stol

National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO 80401e-mail: karl_stol@nrel.gov

Mark J. Balas

Department of Aerospace Engineering Science, University of Colorado at Boulder, Boulder, CO 80309e-mail: mark.balas@colorado.edu

J. Sol. Energy Eng 125(4), 379-385 (Nov 26, 2003) (7 pages) doi:10.1115/1.1621672 History: Received May 08, 2002; Revised June 26, 2003; Online November 26, 2003
Copyright © 2003 by ASME
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Blade flap steady-state solution for linearization
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Blade-bending loads with full-state feedback control
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Wind speed input (solid line) with wind estimate (dotted line) for the periodic DAC controller
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Simulation block diagram for the implementation of periodic DAC in Simulink®
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Schematic of the four DOFs SymDyn model
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Components of the periodic full-state feedback gain, G(t), for blade one pitch
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Components of the disturbance gain, Gd(t). Solid line: blade one pitch, dashed line: blade two pitch.
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Blade one pitch commands with disturbance accommodating control
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Hub-height horizontal wind speed input
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Blade one pitch commands with full-state feedback control
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Blade-bending loads with disturbance accommodating control




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