Borkum Riffgrund I

312 MW Fully Commissioned Germany

"We are using the reports extensively and have built an updated business plan."

Haico Halbesma, Oceanteam Shipping

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Latest Update: 09 October 2015
Fully commissioned. His Royal Highness Prince Joachim of Denmark officially opened the site. Read More
Owner correct
Owns 32% of the project after buying a stake from Dong Energy. Ownership structure Dong Energy (50%), Kirkbi (32%) and the Oticon Foundation (18%).
Value: LogIn
Owns 18% of the project after buying a stake from Dong Energy. Ownership structure Dong Energy (50%), Kirkbi (32%) and the Oticon Foundation (18%).
Value: LogIn
Project Details for Borkum Riffgrund I
General Information Name Borkum Riffgrund I correct
Other names correct
Country name Germany correct
Region Exclusive Economic Zone 1 (DolWin) (BSH Cluster 2 in Draft Network Plan) correct
Comments A new foundation, Suction Bucket Jacket, will be tested on one turbine at the site. DONG have teamed up with the UK Carbon Trust in order to test the new foundation.

According to the April 2014 draft of the Offshore Network Development Plan, when Borkum Riffgrund I connects to DolWin3 the project will have a transmission capacity of 291MW available, despite the capacity of the wind farm being 312MW. In October 2014 Borkum Riffgrund 1's connection at DolWin3 was increased to 110MW.
Round (or category) correct
Development status Fully Commissioned correct
Comments on the status correct
Power & Turbines Notice any Errors? You can keep this an open resource by submitting corrections!
Project Capacity 312 MW correct
Turbine Model SWT-4.0-120 (Siemens) correct
Turbine Capacity 4 MW correct
Number of Turbines 78 correct
Total Turbine Height correct
Hub Height correct
Rotor Diameter 120 m correct
Foundation Grounded: Monopile (One of the turbines will be supported by a prototype called a Suction Bucket Jacket. The monopiles weigh between 510-700 tons, with diameters between 4.75m (top) to 5.90m (bottom) and lengths of 54-66m. The pentration depth ranges between 25.8-35.4m and the transition pieces weigh 330 tons.) correct
Windspeed 10 Year Mean Wind Speed (2000-2009) Available online now
Costs Stated Project Cost EUR(mill) 1250.00 correct
Location & Environment Sea name North Sea correct
Centre latitude 53.967° correct
Centre longitude 6.554° correct
Area 36 km2 correct
Depth range (Chart Datum) 23 m - 29 m correct
Depth range stated by developer 23 m - 29 m correct
Distance From Shore (reported) 54 km correct
Distance From Shore (computed from centre) 55 km correct
Ports Installation base Harbour Norddeich, Eemshaven, Esbjerg (Turbines), BOW Terminal (mob/demob foundations installation) correct
Ops and maintenance Harbour Norddeich correct
Grid Converter/Collector platforms DolWin1 Converter, DolWin3 Converter correct
Offshore transformers Borkum Riffgrund I Substation correct
Grid connection point DolWin1 (alpha) and DolWIn3 (gamma) offshore converter platform - Diele substation (Onshore) temporarily and then the project will be permanently connected to DolWin3. correct
Cable landing point Hilgenriedersiel correct
Export Cables
Please note that export cables connect the offshore transformer (substation) to either; shore or an offshore HVAC-HVDC converter station for onward transmission via HVDC cabling. Please see the converters page for planned converter stations and transmission cables.

The export cable length does not generally include the onshore component. The exception is when the onshore substation is close to shore.
Number of Export Cables 2 correct
Average length per cable 12 km correct
Transmission type (e.g. HVAC) HVAC correct
Nominal voltage 155 kV correct
Maximum voltage correct
Power rating correct
Number of cores correct
Conductor type correct
Section Area correct
Insulation correct
Number fibre optics correct
Export minimum bend radius (MBR) correct
Burial depth correct
Comments correct
Onshore Cables Number of onshore cables correct
Average length per cable correct
Comments correct
Array Cables Array cable length 62 km correct
Estimated cable length LogIn
Transmission type (e.g. MVAC) MVAC correct
Nominal voltage 34 kV correct
Maximum voltage correct
Burial depth correct
Number of cores correct
Conductor type correct
Section correct
Insulation correct
Power rating correct
Number of fibre optics correct
Minimum bend radius (MBR) correct
Comments correct
Benefits Homes powered annually 220976 correct
CO2 reduced per year 446592 tonnes correct
SO2 reduced per year 10386 tonnes correct
Expected life 25.0 years correct
Other Website Visit correct

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