Abstract
Since August 2009, the first German offshore wind farm ‘alpha ventus’ is operating close to the wind measurement platform FINO1. Within the research project RAVE-OWEA the wind flow conditions in ‘alpha ventus’ were assessed in detail, simulated with a CFD wake model and compared with the measurements. Wind data measured at FINO1 have been evaluated for wind speed reduction and turbulence increase in the wake. Additionally operational data were evaluated for the farm efficiency. The atmospheric stability has been evaluated by temperature measurements of air and water and the impact of atmospheric stability on the wind conditions in the wake has been assessed. As an application of CFD models the generation of power matrices is introduced. Power matrices can be used for the continual monitoring of the single wind turbines in the wind farm. A power matrix based on CFD simulations has been created for ‘alpha ventus’ and tested against the measured data.
About the authors
Annette Westerhellweg studied physics at the University of Oldenburg. In 1997 she did her diploma thesis in the field of energy meteorology. She worked as an energy consultant for private households. Since 2000 she has been employed with DEWI GmbH in the field of micrositing and offshore wind energy research. Her main activities in DEWI are energy yield assessments, operational data analysis of wind farms, CFD applications, SoDAR and LiDAR data analysis and offshore wakes.
Beatriz Cañadillas studied physics with a specialization in astrophysics in Tenerife. From 2001–2006 she was employed with a wind turbine manufacturer as project manager for micrositing and power curves. In 2009 she received a PhD in the field of “Atmospheric Turbulence”. Since 2006 she has been employed with DEWI GmbH within the department “Research and Studies”. The focus of her activities in DEWI are Lidar measurements, wind simulation, offshore meteorology and atmospheric turbulence.
Friederike Kinder studied meteorology from 2004 to 2010 at the University of Leipzig. She did her diploma thesis in the field of measurements of atmospheric aerosol particles with regard to hygroscopic growth at Leibniz Institute for Tropospheric Research. Since 2010 she has been employed with DEWI GmbH in the department “Research and Studies”. Her main working field is the maintaining of meteorological measurements at the offshore platform FINO1. Besides she is involved in offshore wind energy research projects.
Thomas Neumann studied physics at the University of Osnabrück and received a PhD in semiconductor physics in 1994. Having developed an interest for renewable energies, he initially began to work for a wind energy developer. After joining the wind energy association FGW (Fördergesellschaft Windenergie) he once more became involved in research issues and committee work on guidelines. Since 2001 he has been employed with DEWI GmbH and since 2005 he is heading DEWI's Research and Studies department.
©[2013] by Walter de Gruyter Berlin Boston
