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TECHNICAL PAPERS

Scale and Lag Effects on Control of Aerodynamic Power and Loads on a HAWT Rotor

[+] Author and Article Information
P. J. Moriarty, A. J. Eggers, K. Chaney, W. E. Holley

RANN Inc., 744 San Antonio Rd., Suite 26, Palo Alto, CA 94303 e-mail: ranninc@pacbell.net

J. Sol. Energy Eng 123(4), 339-345 (Jun 01, 2001) (7 pages) doi:10.1115/1.1408305 History: Received March 01, 2001; Revised June 01, 2001
Copyright © 2001 by ASME
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References

Figures

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Mean pitch angle vs. wind speed
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Closed-loop control: Pitch is used to regulate fluctuating moments
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Blade mass vs. radius for fixed fatigue life of 5×109 rotations
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Fatigue life vs. radius for a fixed blade mass of 2450 kg
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Annual energy capture vs. rotor radius
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Ratio of closed to open-loop mass vs. time constant of actuator lag, τ
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Ratio of closed to open-loop fatigue life vs. time constant of actuator lag, τ
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Ratio of closed to open-loop energy capture vs. time constant of actuator lag, τ
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Comparison of RMS deflection angles
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Comparison of RMS deflection angle rates
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Comparison of RMS deflection angle accelerations
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Simulated mean wind speed
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10-sec. average turbulence intensity
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Total wind speed of simulation
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Sixty seconds of total wind speed data
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Total bending moment in open-loop mode, tavg=10 sec.,tmean=10 sec
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Total bending moment in closed-loop mode, tavg=10 sec.,tmean=10 sec
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Mean power in open-loop mode, tavg=10 sec.,tmean=10 sec
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Mean power in closed-loop mode, tavg=10 sec.,tmean=10 sec

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