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Fig. 2.3 Offshore wind farm projects in the North Sea, status 2013. Green selection identifies
OWF in operating state, red selection marks OWFs that are approved/under construction, and
orange areas are under approval procedures. Zoomed area shows a section north of island Borkum.
Green square presents wind farm alpha ventus. The figure has a copyright by IWR and was taken
from BMU ( 2013 ). It was changed only by adding and highlighting the zoomed area
Naturschutz und Reaktorsicherheit) (Engl.: Federal Ministry for the Environment,
Nature Conservation and Nuclear Safety).
Alpha ventus is known as Germany ' s test wind park, which was developed by the
consortium
Deutsche Offshore-Testfeld und Infrastruktur GmbH & Co. KG
'
(DOTI)
s offshore test field and infrastructure GmbH &
Co. KG) on June 2006 (Bartsch 2013 ). Alpha ventus was commissioned on April
2010. Hence, it was the first offshore wind park in Germany, with an investment
sum of 250 million euros and 30 million euros supported by the BMU. The wind
park is located 45 km north of the island Borkum, where the North Sea has a depth
of around 30 m; see Fig. 2.2 . The test field consists of 12 wind turbines; one
research platform, named Fino1; and one relay station. Together, all of these
wind turbines have got a capacity of 60 MW. Each wind turbine has got a rotor
diameter of 116 m with a hub height of 90 m, a capacity of 5 MW, and a rated speed
of 12.5 m/s. Speed limitations start at 3.5 m/s and ends at 25 m/s. The turbines are
fixed on tripods and jackets (Fig. 2.3 ) and arranged in a 3
(translation: Germany
'
'
4 matrix with three rows
in longitude and 4 rows in latitude. The location is mapped and treated in Sect. 5.4 .
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