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Offshore Wind Statistics

Commissioned Sites by Developer/Owner

Operator Sites
DONG Energy 14
Vattenfall 7
E.ON 4

Comissioned Sites by turbine manufacturer

Turbine Manufacturer Sites
Siemens Wind Power 18
Vestas Wind Systems 16.83
Bonus Energy 4.83

Installed Capacity by Country

Country MW %
United Kingdom 3,309.2 59.2
Denmark 1,271.05 22.74
Netherlands 246.8 4.42

Installed Capacity by commissioned site

Site MW
London Array 1 630
Greater Gabbard 504
Anholt 399.6

Installed Capacity by Operator

Operator MW %
DONG Energy 2,192.85 39.23
Vattenfall 830.9 14.87
SSE Renewables 514 9.2

Installed Capacity & Number of Turbines by turbine manufacturer

Manufacturer
Model
MW %
Siemens Wind Power
Siemens SWT-3.6-107
Siemens SWT-3.6-120
Siemens SWT-2.3-93
Siemens SWT-2.3-101
Siemens SWT-2.3-82 VS
3,403.5
1,551.6
1,224
575
50.6
2.3
60.89
27.76
21.9
10.29
0.91
0.04
Vestas Wind Systems
Vestas V90-3.0 MW
Vestas V80-2.0 MW
Vestas V39-500 kW
Vestas V66-2.0 MW
Vestas V47-660 kW
1,393.32
957
426
5
4
1.32
24.93
17.12
7.62
0.09
0.07
0.02
Bonus Energy
Bonus 2.3 MW/82
Bonus 2.0 MW/76
Bonus 450 kW/37
245.05
200.1
40
4.95
4.38
3.58
0.72
0.09
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Thornton Bank 1 Offshore Wind Farm

General Information

Official Name: Thornton Bank 1
Development Status: Commissioned
Area of Wind Farm: 1 km2
Location: Zeebrugge
Region: Vlaanderen
Country: Belgium
Sea Name: North Sea
GPS Latitude: 51.5454
GPS Longitude: 2.9378
Distance From Shore: 26-27 km
Water Depth: 12-27.5 m

Timeline & Track Records

Project Start: 2003 (June) - Concession granted
2004 (April) - Environmental permit granted
Construction Start: 2007 (May) - Onshore work started
2008 (April) - Foundations
First Power Generation: 2009 (June)
Commission Year: 2009 (July)
Developer: C-Power - owned by RWE Innogy, Nuhma, DEME Group, SRIV Environment, Socofe, EDF Energies Nouvelles
Installer Turbines: GeoSea - Part of DEME Group
Installer Substructure: Scaldis Salvage & Marine Contractors
Installer Inter-Array Cables: Visser & Smit Marine Contracting (VSMC)
Installer Export Cables: Visser & Smit Marine Contracting (VSMC)
Operator: C-Power
TSO: Elia
Estimated Project Cost: 150 mio €

Production & Performance

Total Installed Capacity: 30 MW
Total Number of Turbines: 6

Substations, Inter-Array & Export Cables

Transmission Type: MVAC / HVAC / HVAC
Operating Voltage Level: 33 kV / 150 kV / 150 kV
Inter-Array Radials: 1 radial with 6 turbines
Inter-Array Cable Type: ABB 36 kV
Length: 4 km
Electrical Components Supplier: ABB
Support Structure Type: Jacket
Foundation Type: Piled
Offshore Structure Manufacturer: HSM Offshore - Topside
SLP Engineering - Jacket foundation. Part of Smulders
Offshore Structure Designer: OWEC Tower - Topside and jacket foundation
Offshore Substation Description Thornton Bank 1 will be connected to the 150 kV offshore substation when Thornton Bank 2 is constructed. Length: 45 m, Width: 45 m. Height: 20 m. Weight: 2000 t
Export Cable Type: ABB 170 kV
Total Length: 38 km
Power Frequency: 50 Hz
Export Cable Landfall: Bredene, Vlaanderen (Belgium)
Onshore Substation Location: Bredene, Vlaanderen (Belgium)

Turbine, Tower & Substructure

Turbine:  
Turbine Manufacturer: REpower Systems
Turbine Model: REpower 5M
Number of Turbines: 6
Rated Power pr. Turbine: 5 MW
Estimated Watt pr. Rotor m2: 401 watt
Wind Class: IEC IB
Design Life: 20 years
Operational:  
Cut-in Wind Speed: 3.5 m/s
Rated Wind Speed: 14 m/s
Cut-out Wind Speed: 25 m/s
Rotor & Hub:  
Rotor Type: 3-bladed, horisontal axis
Rotor Position: Upwind
Rotor Diameter: 126 m
Rotor Area: 12469 m2
Rotor Speed (min): 6.9 rpm
Rotor Speed (rated): 12.1 rpm
Rotor Speed (max): 13.9 rpm
Rotor Weight (incl. hub): 120 t
Hub Height (above MSL): 94 m
Blade Tip Speed (rated): 79.83 m/s
Blade Tip Speed (max): 91.70 m/s
Blade Tip Height (above MSL): 157 m
Blade Length: 61.5 m
Power Regulation: Pitch regulated with variable speed (electric)
Nacelle:  
Drive Train Type: High speed
Gearbox Ratio: 1:97
Gearbox Stages: 2 planetary stages, 1 helical stage
Generator Type: DFIG
Generator Rated Power: 5075 kW
Generator Number of Poles: 6 poles
Generator Rated Speed: 1170 rpm
Power Converter: Rotor
Power Converter Location: Nacelle
Power Frequency: 50 Hz
Turbine Voltage Level: 950/660 V
Transformer Voltage Level: 33 kV
Transformer Location: Nacelle
Nacelle Weight: 290 t
Top Head Mass: 410 t
Tower:  
Structure Type: Tubular
Structure Material: Steel
Substructure:  
Structure Type: Gravity based
Number of Support Structures: 6
Support Structure Material: Concrete
Support Structure Description: Diameters - base slab: 23.5 m, conical part: 17 m to 6.5 m, cylindrical part: 9.1 m. Height: 42 m. Weight: 2,700-3,000 t. Concrete: 6,800 t. Reinforcement: 1,500 t. Post-tensionning tendons; 36 pieces - each 1770 Mpa tensile strength
Foundation Type: Gravity
Foundation Structure Description: Filling - volume: 2000 m3. Filling - weight: 3,800 t. Offshore pit - excavations: 80,000 m3 sand. Backfilling: 50,000 m3
Scour Protection: Gravel bed and erosion protection system: 4,510 m3 stones per GBF
Substructure Main Contractor: THV Seawind
Substructure Manufacturer: MBG - Gravity foundations
Smulders - Transition pieces
Substructure Designer: COWI

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