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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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Scroby Sands Offshore Wind Farm

General Information

Official Name: Scroby Sands
Development Status: Commissioned
Area of Wind Farm: 10 km2
Number of Rows/Turbines: 3 x 10 turbines
Location: Caister
Region: Norfolk
Country: United Kingdom
Sea Name: North Sea
GPS Latitude: 52.6458
GPS Longitude: 1.7876
Distance From Shore: 2.3 km
Water Depth: 5-10 m
Tidal Range: 3-5 m
Generel Note: Round 1 site. The Scroby project was supported by European Commission Thermie funding

Timeline & Track Records

Project Start: 2001 (March) - Application submitted
2002 (April) - Project consented
Construction Start: 2003 (October) - Foundations
Commission Year: 2004 (March)
Developer: E.ON
Installer Turbines: A2SEA - 24 turbines
Fugro Seacore - 6 turbines
Installer Substructure: Van Oord
Installer Inter-Array Cables: CNS Subsea - Formerly Subocean, Now Technip
Installer Export Cables: CNS Subsea - Formerly Subocean, Now Technip
Oceanteam - Installed a 5 km replacement export cable
Operator: E.ON
TSO: National Grid
Total Project Cost: 87 mio €

Wind & Waves

Average Wind Speed: 8.6 m/s at 65 m

Production & Performance

Total Installed Capacity: 60 MW
Total Number of Turbines: 30
Annual Estimated Production: 171 GWh/year
Annual Production: 170.4 GWh in 2012

Show previous years

172.00 GWh in 2011
148.29 GWh in 2010
169.45 GWh in 2009
151.92 GWh in 2008
145.21 GWh in 2007
Capacity Factor: 32.42 % in 2012

Show previous years

32.72 % in 2011
28.21 % in 2010
32.24 % in 2009
28.90 % in 2008
27.63 % in 2007

Substations, Inter-Array & Export Cables

Transmission Type: MVAC / HVAC
Operating Voltage Level: 33 kV / 132 kV
Inter-Array Radials: 3 radials with 10 turbines
Inter-Array Cable Type: AEI Cables 33 kV
Conductor Size: 3 x 240 mm2 (Cu)
Total Length: 18.3 km
Burial Depth: 3 m
Inter-Array Description: Weight: 430 t. 29 x 600-650 m single armoured inter-array cables
Export Cable Type: 3 x AEI Cables 33 kV / Parker Scanrope 33 kV
Conductor Size: 3 x 300 mm2 (Cu) /
Length: 4 km / 5 km
Total Length: 12.7 km
Burial Depth: 3 m
Export Cable Description: Double armoured export cables. Each export cable connects 10 turbines to shore
Power Frequency: 50 Hz
Export Cable Landfall: North Denes, Great Yarmouth, Norfolk (United Kingdom)
Onshore Substation Location: Great Yarmouth, Norfolk (United Kingdom)

Turbine, Tower & Substructure

Turbine:  
Turbine Manufacturer: Vestas Wind Systems
Turbine Model: Vestas V80-2.0 MW
Number of Turbines: 30
Rated Power pr. Turbine: 2 MW
Estimated Watt pr. Rotor m2: 398 watt
Wind Class: IEC IA
Operational:  
Cut-in Wind Speed: 4 m/s
Rated Wind Speed: 16 m/s
Cut-out Wind Speed: 25 m/s
Operational Temperature: -30°C to 40°C
Rotor & Hub:  
Rotor Type: 3-bladed, horisontal axis
Rotor Position: Upwind
Rotor Diameter: 80 m
Rotor Area: 5027 m2
Rotor Speed (min): 10.8 rpm
Rotor Speed (rated): 16.7 rpm
Rotor Speed (max): 19.1 rpm
Rotor Weight (incl. hub): 37 t
Hub Height (above MSL): 68 m
Blade Tip Speed (rated): 69.95 m/s
Blade Tip Speed (max): 80.01 m/s
Blade Tip Height (above MSL): 108 m
Blade Length: 39 m
Blade Max Chord (max width): 3.5 m
Weight pr. Blade: 6.5 t
Power Regulation: Pitch regulated with variable speed (hydraulic)
Nacelle:  
Drive Train Type: High speed
Gearbox Ratio: 1:100.5
Gearbox Stages: 2 planetary stages, 1 helical stage
Gearbox Lubrication: Forced oil lubrication
Generator Type: DFIG
Generator Rated Power: 2000 kW
Generator Number of Poles: 4 poles
Power Converter: Rotor
Power Frequency: 50 Hz
Turbine Voltage Level: 690/480 V
Transformer Voltage Level: 33 kV
Yaw Gears - Number: 4
Dimensions of Nacelle:  
Length: 10.4 m
Width: 3.4 m
Height: 5.4 m
Nacelle Weight: 78 t
Top Head Mass: 115 t
Tower:  
Structure Type: Tubular
Structure Material: Steel
Height: 60 m
Weight: 110 t
Substructure:  
Structure Type: Monopiles
Number of Support Structures: 30
Support Structure Material: Steel
Support Structure Description: Diameter: 4.2 m. Length: 40-50 m. Weight: up to 200 t. Height above MSL: 8 m
Foundation Type: Piled
Foundation Structure Description: The monopiles are driven 31 m into the seabed
Scour Protection: The foundations are protected with a layer of stones
Geotechnical Description: The seabed consists of dense to medium sand
Substructure Manufacturer: Cambrian Engineering - 16 x monopiles
Isleburn Mackay & Macleod - 14 x monopiles
Substructure Designer: LICengineering

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