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Annual Production: - GW
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Offshore Wind Statistics

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Commissioned Sites by Developer/Owner

Operator Sites
DONG Energy 13
Vattenfall 7
E.ON 4

Comissioned Sites by turbine manufacturer

Turbine Manufacturer Sites
Siemens Wind Power 17
Vestas Wind Systems 16.83
Bonus Energy 4.83

Installed Capacity by Country

Country MW %
United Kingdom 3,309.2 63.76
Denmark 871.45 16.79
Netherlands 246.8 4.76

Installed Capacity by commissioned site

Site MW
London Array 1 630
Greater Gabbard 504
Sheringham Shoal 316.8

Installed Capacity by Operator

Operator MW %
DONG Energy 1,793.25 34.55
Vattenfall 830.9 16.01
SSE Renewables 514 9.9

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
3,003.9
1,551.6
824.4
575
50.6
2.3
57.88
29.9
15.88
11.08
0.97
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
26.85
18.44
8.21
0.1
0.08
0.03
Bonus Energy
Bonus 2.3 MW/82
Bonus 2.0 MW/76
Bonus 450 kW/37
245.05
200.1
40
4.95
4.72
3.86
0.77
0.1
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Yttre Stengrund Offshore Wind Farm

General Information

Official Name: Yttre Stengrund
Development Status: Commissioned
Location: Öland
Region: Kalmar
Country: Sweden
Sea Name: Baltic Sea
GPS Latitude: 56.1659
GPS Longitude: 16.0220
Distance From Shore: 4 km
Water Depth: 6-10 m
Generel Note: Two of the five turbines are currently offline, WTG 1 since 2006 (December) and WTG 5 since 2008 (January)

Timeline & Track Records

First Power Generation: 2001 (August)
Commission Year: 2001 (September)
Developer: Elsam - owned by Vattenfall (100%)
Installer Turbines: Muhibbah Engineering
Installer Substructure: Fugro Seacore
Installer Inter-Array Cables: OM O2
Installer Export Cables: OM O2
Operator: Vattenfall
TSO: Svenska Kraftnät
Estimated Project Cost: 13 mio €

Wind & Waves

Average Wind Speed: 8.47 m/s at 60 m

Production & Performance

Total Installed Capacity: 10 MW
Total Number of Turbines: 5
Annual Estimated Production: 30 GWh/year
Annual Production: 14.74 GWh in 2011

Show previous years

16.49 GWh in 2010
12.88 GWh in 2009
8.33 GWh in 2008
20.90 GWh in 2007
14.20 GWh in 2006
3.05 GWh in 2005
26.04 GWh in 2004
22.19 GWh in 2003
24.14 GWh in 2002
Capacity Factor: 16.83 % in 2011

Show previous years

18.83 % in 2010
14.71 % in 2009
9.51 % in 2008
23.86 % in 2007
16.21 % in 2006
3.49 % in 2005
29.72 % in 2004
25.33 % in 2003
27.56 % in 2002

Substations, Inter-Array & Export Cables

Transmission Type: MVAC
Operating Voltage Level: 20 kV
Inter-Array Cable Type: ABB 24 kV
Total Length: 2 km
Export Cable Type: ABB 24 kV
Total Length: 6 km
Export Cable Description: The subsea export cable is extended with 16 km land cable to connect the wind farm to the onshore substation

Turbine, Tower & Substructure

Turbine:  
Turbine Manufacturer: NEG Micon - Now Vestas Wind Systems
Turbine Model: NEG Micon NM72/2000
Number of Turbines: 5
Rated Power pr. Turbine: 2 MW
Estimated Watt pr. Rotor m2: 491 watt
Operational:  
Cut-in Wind Speed: 4 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: 72 m
Rotor Area: 4072 m2
Rotor Speed (rated): 18 / 12 rpm
Rotor Weight (incl. hub): 40 t
Hub Height (above MSL): 60 m
Blade Tip Speed (rated): 67.86 / 45.24 m/s
Blade Length: 35 m
Power Regulation: Active stall (hydraulic)
Blade Manufacturer: LM Wind Power
Blade Model - Name: LM 35
Nacelle:  
Drive Train Type: High speed
Gearbox Ratio: 1:83.5
Gearbox Stages: 3 planetary stages, 1 spur stage
Generator Type: Asynchronous, pole switchable
Generator Rated Power: 2000 / 500 kW
Generator Number of Poles: 4 / 6 poles
Generator Rated Speed: 1500 / 1000 rpm
Power Converter: None
Power Frequency: 50 Hz
Turbine Voltage Level: 960 V
Nacelle Weight: 85 t
Top Head Mass: 125 t
Tower:  
Structure Type: Tubular
Structure Material: Steel
Substructure:  
Structure Type: Monopiles
Number of Support Structures: 5
Support Structure Material: Steel
Foundation Type: Piled
Substructure Manufacturer: Sif Group
AMEC
Substructure Designer: COWI

Resources

Website: Yttre Stengrund Offshore Wind Farm
 
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