Title
Application of LiDARs in Annual Energy Production Assessment of Wind Turbines
Author
Asgarpour, M.
Marina, A.J.
Energieonderzoek Centrum Nederland
Publication year
2016
Abstract
The first work package of the LAWINE project is allocated to the application of LiDARs in wind resource assessments. In this report, energy production of a prototype 2.5 MW wind turbine at ECN Wind turbine Test site Wieringermeer߿ݠor EWTW are estimated using a meteorological mast, as well as a ground-based LiDAR and these are compared to the actual power production of the turbine. <p> The comparison of predicted and actual energy yield utilising hub height wind speed shows that using a meteorological mast, the energy yield prediction was 2.9% lower than the actual production. The ground based LiDAR showed a smaller deficit, being 0.7% lower than the actual energy yield. There was evidence in the results to suggest that the difference in the values is not due to limitations in either device, however it is more likely due to a small offset (under prediction) of the local wind speed from the meteorological mast measurement device. <p> The main benefits of ground based LiDAR devices are their better economics as well as the ability to measure easily at multiple heights covering the rotor area. Part of this report was also dedicated to investigating if the calculation of the rotor equivalent wind speed (REWS) resulted in better prediction of the energy yield compared to the calculations using the hub height wind speed. The analysis using the rotor equivalent wind speed at this site was inconclusive and made it difficult to draw conclusions. Further work should be completed utilising a larger data set and more turbines with REWS verified power curves in order to gain stronger conclusions on this subject.
To reference this document use:
http://resolver.tudelft.nl/uuid:6da9e896-48c7-43c4-8bd8-9fc7b2c9a70b
TNO identifier
823460
Report number
ECN-E--16-049
Publisher
ECN, Petten
Document type
report