Power losses due to wind turbine wakes
are of the order of 10 and 20% of total
power output in large wind farms. The focus
of this research carried out within the EC
funded UPWIND project is wind speed and
turbulence modelling for large wind
farms/wind turbines in complex terrain and
offshore in order to optimise wind farm
layouts to reduce wake losses and loads.
For complex terrain, a set of three
evaluations is underway. The first is a
model comparison for a Gaussian Hill
where CFD models and wind farm models
are being compared for the case of one hilltop
wind turbine. The next case is for five
turbines in flat terrain. Finally a complex
terrain wind farm will be modelled and
compared with observations.
For offshore wind farms, the focus is on
cases at the Horns Rev wind farm which
indicate wind farm models require
modification to reduce under-prediction of
wake losses while CFD models typically
over-predict wake losses. Further
investigation is underway to determine the
causes of these discrepancies.
The project therefore represents a set of
unique evaluations of models with
observations in different environments.
Progress towards improving wind farm
models will be described.
|Conference||European Wind Energy Association Conference 2008|
|Period||01/01/2008 → …|