Evaluation of wind farm efficiency and wind turbine wakes at the Nysted offshore wind farm

R. J. Barthelmie; L. E. Jensen

doi:10.1002/we.408

journal article May 25, 2010

Evaluation of wind farm efficiency and wind turbine wakes at the Nysted offshore wind farm

R. J. Barthelmie

L. E. Jensen

Wind Energy Vol. 13 No. 6 pp. 573-586 · Wiley

View at Publisher Save 10.1002/we.408

Abstract

AbstractHere, we quantify relationships between wind farm efficiency and wind speed, direction, turbulence and atmospheric stability using power output from the large offshore wind farm at Nysted in Denmark. Wake losses are, as expected, most strongly related to wind speed variations through the turbine thrust coefficient; with direction, atmospheric stability and turbulence as important second order effects. While the wind farm efficiency is highly dependent on the distribution of wind speeds and wind direction, it is shown that the impact of turbine spacing on wake losses and turbine efficiency can be quantified, albeit with relatively large uncertainty due to stochastic effects in the data. There is evidence of the ‘deep array effect’ in that wake losses in the centre of the wind farm are under‐estimated by the wind farm model WAsP, although overall efficiency of the wind farm is well predicted due to compensating edge effects. Copyright © 2010 John Wiley & Sons, Ltd.

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Details

Published: May 25, 2010
Vol/Issue: 13(6)
Pages: 573-586
License: View

Authors

R

R. J. Barthelmie

Atmospheric Science and Sustainability, College of Arts and Sciences Indiana University Bloomington IN 47405 USA

L

L. E. Jensen

Cite This Article

R. J. Barthelmie, L. E. Jensen (2010). Evaluation of wind farm efficiency and wind turbine wakes at the Nysted offshore wind farm. Wind Energy, 13(6), 573-586. https://doi.org/10.1002/we.408

Evaluation of wind farm efficiency and wind turbine wakes at the Nysted offshore wind farm

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