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TECHNICAL PAPERS

Methods for Increasing Region 2 Power Capture on a Variable-Speed Wind Turbine

[+] Author and Article Information
Kathryn E. Johnson, Lee J. Fingersh

National Renewable Energy Laboratory, 1617 Cole Boulevard, MS 3811, Golden, CO 80401-3393

Mark J. Balas

Aerospace Engineering, University of Colorado, 429 UCB, Boulder, CO 80309e-mail: mark.balas@colorado.edu

Lucy Y. Pao

Electrical Engineering, University of Colorado, 425 UCB, Boulder, CO 80309e-mail: pao@colorado.edu

J. Sol. Energy Eng 126(4), 1092-1100 (Nov 18, 2004) (9 pages) doi:10.1115/1.1792653 History: Received January 20, 2004; Revised June 24, 2004; Online November 18, 2004
Copyright © 2004 by ASME
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References

Walker, S. N., and Wilson, R. E., 1976, Performance Analysis Program for Propeller Type Wind Turbines, Oregon State University, Corvallis, OR.
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Johnson, K. E., Fingersh, L. J., Balas, M. J., and Pao, L. Y., 2004, “Methods for Increasing Region 2 Power Capture on a Variable Speed HAWT,” Paper No. AIAA-2004-0350, Proc. 23rd ASME Wind Energy Symposium, Reno, NV, pp. 103–113.
Johnson, K. E., 2004, “Adaptive Torque Control of Variable Speed Wind Turbines,” Ph.D. thesis, University of Colorado, Boulder, CO.
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Bossanyi, E. A., 1987, “Adaptive Pitch Control for a 250 kW Wind Turbine,” Proc. BWEA Wind Energy Conference, J. B. Galt, ed., Mechanical Engineering Publications, London, pp. 85–92.
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Figures

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Cp vs. TSR and pitch for Controls Advanced Research Turbine (CART)
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CART Cp vs. TSR and cubic function
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Sub-optimal operation due to inaccurate Cp-TSR curve
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Optimum torque control gain vs. turbulence intensity
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Improved power capture with OTR control
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Fractional average power vs. normalized M
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Simulation results with constant wind input
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Simulation results with measured wind data as input
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Adaptations of M on the CART vs. time
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Grid power vs. equivalent wind speed for standard and adaptive control: (a) 10-minute averages; (b) binned data with error bars

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