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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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Horns Rev 1 Offshore Wind Farm

General Information

Official Name: Horns Rev 1
Alternative Name: Horns Reef 1
Development Status: Commissioned
Area of Wind Farm: 20 km2
Number of Rows/Turbines: 8 x 10 turbines
Location: Blåvandshuk
Region: Esbjerg, Vestjylland
Country: Denmark
Sea Name: North Sea
GPS Latitude: 55.4854
GPS Longitude: 7.8397
Distance From Shore: 14-20 km
Water Depth: 6-14 m
Tidal Range: 1.2 m

Timeline & Track Records

Project Start: 1999 (June) - Preliminary approval
Construction Start: 2002 (February) - Foundations
First Power Generation: 2002 (July)
Commission Year: 2002 (December)
Developer: Horns Rev 1 - owned by Vattenfall (60%), DONG Energy (40%)
Installer Turbines: Ballast Nedam - 80 turbines
A2SEA - Re-complition of turbine installation
Installer Substructure: Van Oord - Lead
Scaldis Salvage & Marine Contractors - 80 monopiles
DBB Jack-Up Services - 80 transition pieces
Dredging International - Scour protection. Part of DEME Group
Installer Inter-Array Cables: Global Marine Systems
JD-Contractor (Jydsk Dyk)
Depret
Installer Export Cables: JD-Contractor (Jydsk Dyk)
Installer Offshore Substation: SMIT - Topside
Scaldis Salvage & Marine Contractors - Monopile
Operator: Vattenfall
TSO: Energinet.dk
Total Project Cost: 270 mio €

Wind & Waves

Average Wind Speed: 9.7 m/s at 62 m
Average Wave Height: 1-1.5 m

Production & Performance

Total Installed Capacity: 160 MW
Total Number of Turbines: 80
Annual Estimated Production: 600 GWh/year
Annual Production: 676 GWh in 2012

Show previous years

669.83 GWh in 2011
565.84 GWh in 2010
581.24 GWh in 2009
626.91 GWh in 2008
659.52 GWh in 2007
596.27 GWh in 2006
629.97 GWh in 2005
366.89 GWh in 2004
459.78 GWh in 2003
44.32 GWh in 2002
Capacity Factor: 48.23 % in 2012

Show previous years

47.79 % in 2011
40.37 % in 2010
41.47 % in 2009
44.73 % in 2008
47.06 % in 2007
42.54 % in 2006
44.95 % in 2005
26.18 % in 2004
32.80 % in 2003

Substations, Inter-Array & Export Cables

Transmission Type: MVAC / HVAC / HVAC
Operating Voltage Level: 33 kV / 150 kV / 150 kV
Inter-Array Radials: 10 radials with 8 turbines
Inter-Array Cable Type: Nexans 36 kV PEX
Burial Depth: 1.5-2 m
Inter-Array Description: 2 array cable types used. Diameter: 10 cm and 13 cm
Transformers: 160 MVA
Electrical Components Supplier: Siemens Transmission and Distribution - 36 kV switchgear
Alstom Grid - 170 kV transformer
Support Structure Type: Monopile
Foundation Type: Piled
Offshore Structure Manufacturer: HSM Offshore - Topside and monopile
Export Cable Type: Nexans 150 kV
Weight: 75 kg/m
Total Length: 22 km
Burial Depth: 1.5-2 m
Export Cable Description: Diameter: 19.2 cm
Power Frequency: 50 Hz
Export Cable Landfall: Hvidbjerg Strand, Esbjerg, Vestjylland (Denmark)
Onshore Substation Location: Oksby, Esbjerg, Vestjylland (Denmark)

Turbine, Tower & Substructure

Turbine:  
Turbine Manufacturer: Vestas Wind Systems
Turbine Model: Vestas V80-2.0 MW
Number of Turbines: 80
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
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): 20 t
Hub Height (above MSL): 70 m
Blade Tip Speed (rated): 69.95 m/s
Blade Tip Speed (max): 80.01 m/s
Blade Tip Height (above MSL): 110 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
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: 79 t
Top Head Mass: 99 t
Tower:  
Structure Type: Tubular
Structure Material: Steel
Height: 61 m
Weight: 160 t
Substructure:  
Structure Type: Monopiles
Number of Support Structures: 80
Support Structure Material: Steel
Transition Piece Structure Description: Grouted, cathodic protection used, 9 m above sea level
Support Structure Description: Diameter: 4 m. Thickness: 5 cm. Weight: 180-230 t
Foundation Type: Piled
Foundation Structure Description: The monopiles are driven 25 m into seabed
Scour Protection: Two layers of gravel are placed around the foundation to protect against erosion. First layer. Thickness: 0.5 m. Gravel diameter: 0.03-0.2 m. Second layer. Thickness: 0.8 m. Gravel diameter: 0.35-0.55 m
Geotechnical Description: Horns Rev consists of sand, gravel, pebble gravel and stones with only few pockets of fine materials
Substructure Main Contractor: MT Højgaard
Substructure Manufacturer: Sif Group - Monopiles and transition pieces
Smulders - Monopiles and transition pieces
Substructure Designer: NIRAS

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