1. DATASHEET
general information
Gemini offshore wind farm
Official name Project Gemini
Status Under construction
Area of windfarm 2 x 34 km2
Description Buitengaats & ZeeEnergie
Location North of the isle Schiermonnikoog
Country Netherlands
Sea name North Sea
Distance from shore 85 km
Water depth 28 - 36 m
Owner Northland Power Inc. (60%), Siemens (20%), Van Oord
(10%) and HVC (10%)
Installer Turbines Siemens
Installer Foundations Structure Van Oord Offshore Wind Projects BV
Construction Start estimated Q2 2014
Operator Gemini
Commission Year estimated 2017
Project & Organization
Production
Total Capacity to be installed 600 MW
Total Number of Turbines 150
Annual Estimated Production ~ 2,6 TWh/year
Offshore Subsation & Grid Connection
Transformer 2 Offshore Substations
Infield Voltage Level 33 kV
Export Voltage Level 220 kV
Infield Cable Length/Material 105 KM
Supplier NSW
Export Cable Length/Material 110 km / Aluminium
Transmission Type HVAC
Supplier NKT
Technical Specifications Wind Turbine
Manufacturer Siemens
Model SWT4.0 - 130
Rated Power pr. Turbine 4.0 MW
Number of Turbines 150
IEC Wind Turbine Class IB

2. DATASHEET
Nacelle
Drive Train Type 3 stage planetary / helical
Gearbox Ratio 1:119
Generator Type SCIG
Power Converter Type 4Q Full
Turbine Voltage Level 690V
Yaw Gears - Number
Dimensions of Nacelle
Length 14m
Width 2-4m
Height 4m
Tower
Structure Type Tubular
Structure Material Steel
Foundational Structure
Structure Type Monopiles
Support Structure Material Steel
Foundational Type Piled
Technical Specifications
Resources
Website www.geminiwindfarm.com
Operational
Cut-in Wind Speed 4 m/s
Rated Wind Speed 12 m/s
Cut-out Wind Speed 30 m/s
Rotor & Hub
Rotor Diameter 130 m
Rotor Area 13.300 m2
Rotor Speed (rated) 5-13 rpm
Hub Height (above sea level) 90 m
Blade Type B63
Blade Lenght 63 m
Pitch System
Technical Specifications