Measuring the Impact of Atmospheric Conditions and Array Depth on Wake Losses. Anna Marsh – DNV KEMA. 04 – 07 Feb 2013, Vienna Austria. Contents. Introduction to the test site Measurements Comparison to models Conclusions. Introduction to the Site.
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Anna Marsh – DNV KEMA
04 – 07 Feb 2013, Vienna Austria
Introduction to the test site
Comparison to models
2 km Grid Lines (about 25 D)
Relative Power = % Power Difference Relative to Front Row
Shear Difference Across Rotor =
Top Shear (80m/120m Alpha)
Bottom Shear (40m/80m Alpha)
Single turbine wake models
Square root of sum of squares (SS)
Energy balance (EB)
Accounting for atmospheric conditions
Time Series Park and Eddy Viscosity Model
Data used in Measured and Modelled Results
August through December data
Filtered for 6m/s to 12m/s
Special thanks to project participants who shared data for this study.