Dan Tysk

DanTysk Offshore Wind Farm Profile

Location

The DanTysk offshore wind farm is situated in the North Sea, approximately 70 kilometers west of the island of Sylt, at the border between Germany and Denmark.

Ownership and Operation

The wind farm is a joint venture between Vattenfall, which holds a 51% stake, and Stadtwerke München (SWM), which holds a 49% stake. Vattenfall is responsible for the construction and maintenance of the facilities.

Technical Specifications

• Capacity: The wind farm has a total capacity of 288 megawatts (MW).
• Turbines: It consists of 80 Siemens Wind Power SWT-3.6-120 turbines, each with a capacity of 3.6 MW and a rotor diameter of 120 meters. The tip height of the turbines reaches 148 meters.
• Foundations: The turbines are installed on monopile foundations in water depths ranging from 21 to 31 meters.
• Area: The wind farm spans an area of approximately 70-71 square kilometers.

Power Generation and Transmission

• Electricity Production: The wind farm is capable of producing enough electricity to power over 400,000 households, assuming an average consumption rate of 2,500 kWh per home per year.
• Power Transmission: The AC power generated by the turbines is collected by an offshore transformer substation and converted into high-voltage direct current (HVDC) at the SylWin alpha converter station. The power is then transmitted to the onshore Büttel substation via a 160 km sea cable and a 45 km land cable. The DC power is converted back into AC at the onshore converter station and distributed through the national ultra-high-voltage electricity grid.

Construction and Commissioning

• Construction Start: The construction of the DanTysk offshore wind farm began in March 2012. Offshore construction work started in February 2013, and all 80 foundations were installed by December 2013. Turbine installation began in March 2014 and was completed by the end of 2014.
• Commissioning: The wind farm produced its first power in December 2014, and the formal commissioning took place in April 2015.

Logistics and Maintenance

• Accommodation Platform: A unique offshore accommodation platform, connected by a bridge to the DanTysk substation, accommodates up to 50 service technicians. The platform includes offices, bedrooms, workshops, a canteen, gym, cinema, and an on-board hospital. Technicians work and live on the platform in shifts, providing maintenance and service work 365 days a year.
• Transportation: Technicians are transported to the wind farm using Crew Transfer Vessels (CTVs) or helicopters during winter months when sea conditions are unfavorable. The service teams travel daily to the wind turbines if weather conditions permit.

Environmental and Economic Impact

• Environmental Benefits: The wind farm contributes significantly to reducing CO2 emissions and is part of Europe's efforts to transition to renewable energy sources.
• Economic Impact: The project cost over €1 billion and was developed to support the long-term goals of generating electricity from offshore wind farms, contributing to the economic and environmental sustainability of the region.

Contractors and Suppliers

• Turbine Supply: Siemens Energy supplied the SWT-3.6-120 wind turbines and was responsible for their installation and maintenance.
• Transformer Substation: A joint venture of Strukton Systems and Hollandia supplied the 155kV/33kV offshore transformer substation.
• Foundations: The Aarsleff Bilfinger Berger joint venture was responsible for the design, production, and installation of the monopile foundations.
• Heavy-Lift Vessel: Swire Blue Ocean's heavy-lift vessel, Pacific Orca, was used for transporting and installing the wind turbines.

The DanTysk offshore wind farm is a significant contributor to Germany's renewable energy sector, providing climate-friendly electricity and supporting the country's transition to cleaner energy sources.