Journal
RENEWABLE ENERGY
Volume 61, Issue -, Pages 69-73Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2012.08.015
Keywords
Small wind turbine; Turbulence; Gusts; Wind energy
Funding
- Canada Foundation for Innovation (CFI)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
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High resolution measurements of wind speed and energy generation from an instrumented Bergey XL.1 small wind turbine were used to investigate the effect of ambient turbulence levels on wind turbine energy production. It was found that ambient turbulent intensity impacts energy production, but that the impact is different at different wind speeds. At low wind speeds, increased turbulence appeared to increase energy production from the turbine. However, at wind speeds near the turbine furling speed, elevated turbulence resulted in decreased energy production, likely to turbulent gusts initiating furling events. Investigation of measurements recorded at 1 Hz showed a time lag of one to 2 s between a change in wind speed and the resulting change in energy production. Transient changes in wind speed of only 1 s duration did not impact energy production, however, longer duration changes in wind speed were tracked reasonably well by energy production. (C) 2012 Elsevier Ltd. All rights reserved.
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