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Abstract
Dual-Doppler radar is a relatively new technology in the wind energy community and thus not yet studied vastly. This paper aims to compare horizontal wind speed and direction data retrieved from dual-Doppler radar and profiling lidars within the American WAKE experimeNt (AWAKEN) to investigate the influence of measurement height, wind direction and speed on the comparison. The 10-min averaged data show a better agreement of the measurements for higher altitudes, especially at faster wind speeds. For the wind direction, two sectors of larger differences in the measurements were detected: around 270° transient winds occur with a higher frequency than in other sectors. To explain the different measurement values in the wind direction sector around 90°, further studies, e.g. on the influence of atmospheric stability, are necessary.
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Details
1 Carl von Ossietzky Universität Oldenburg, School V, Institute of Physics; ForWind - Center for Wind Energy Research , Küpkersweg 70, 26129 Oldenburg , Germany
2 Fraunhofer Institute for Wind Energy Systems IWES , Bremerhaven , Germany
3 Texas Tech University , Lubbock, TX , USA; SmartWind Technologies, LLC , Lubbock, TX , USA
4 University of Colorado Boulder , Boulder, CO , USA; National Renewable Energy Laboratory , Golden, CO , USA