It was the goal of the project – by means of data from the
demonstration wind farms Horns Rev and Nysted, analyses of
these data and modelling – to facilitate prediction of the power
losses from a wind farm should a new wind farm be built
upwind relative to the prevailing wind direction. Or conversely,
predict with adequate accuracy the production of a new wind
farm built downwind of an existing wind farm.
The project should be seen in the perspective of the two existing
demonstration wind farms that extend 5-10 km in each direction.
In order to e.g. use the existing electrical infrastructure it may
appropriate to build new wind farms rather close to the existing
wind farms. A relevant question is therefore how far away new
wind farms must be placed to avoid too large power losses.
Measurements have been carried out for several years at the two
sites, and databases have been prepared. The databases – one for
each site – include production and operational statistics for the
wind turbines and statistics for the meteorological measurements
carries out in the vicinity of the wind farms.
Several different modelling activities were carried out, which
intentionally to some extent are redundant. Thus, if different
modelling efforts results in comparable results, the quality of the
models will be tested outside the physical range where data are
All considered the project participants find that the project has
been immensely successful. The main achievements of the
• Measurements were carried out at the Nysted and Horns Rev
demonstration wind farms for several years. Doing so
included design, installation and operation of the
• A data base was built from the incoming data. The data have
been organized to facilitate verification of the models
developed as part of the project
• 6-7 different models have been developed and compared.
• Approximately 20 journal and conference papers have
resulted directly from the project.
|Place of Publication||Risø, Roskilde, DK|
|Publisher||Risø National Laboratory|
|Number of pages||35|
|Publication status||Published - 2007|
|Series||Denmark. Forskningscenter Risoe. Risoe-R|
- data analysis
- shadow effect
- wind farm