Analysis of wind coherence in the longitudinal direction using turbine mounted lidar

The Science of Making Torque from Wind

Davoust, S.^1 ; Von Terzi, D.^1

GE Global Research, Freisinger Landstrasse 50, Munich

85748, Germany^1

关键词: Atmospheric conditions;    Computational studies;    Decay parameters;    Lidar measurements;    Longitudinal direction;    Turbulence intensity;    Wind measurement;    Wind turbine control;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/7/072005/pdf
DOI  :  10.1088/1742-6596/753/7/072005

来源: IOP

【 摘 要 】

The use of lidar for wind turbine control relies on the hypothesis that the wind coherence in the longitudinal direction is sufficient to derive useful information from wind measurements at upstream locations. We examined wind coherence using measurements of longitudinal wind speed obtained using a forward facing pulsed turbine mounted lidar over three sites. The effect of different atmospheric conditions was evaluated. We found that the coherence decay parameter increases together with turbulence intensity, while the parameter defining the coherence at 0Hz increases with integral length-scale. A correction was applied for artificial coherence decrease due to lidar measurement effects. Results display encouraging similarities with a computational study carried out based on Large Eddy Simulation.