TenneT, the transmission system operator, has installed DoIWin Kappa, an offshore structure 45 km off the coast of Lower Saxony in the North Sea. This platform is to guarantee 900 MW of renewable energy from the wind farm to more than one million German households.
After a twelve-day operation, the DoIWin Kappa platform was delivered, pending a connection to the DoIWin6 network in 2023.
A new success for TenneT
TenneT achieves another success with the delivery of the platform in only 12 days. The company has confirmed its status as a leading European electricity transmission operator with this new achievement.
Operations Manager Tim Meyerjürgens says:
“TenneT is the leader in offshore power supply in Europe. We have proven this again with the timely installation of the DoIWin Kappa platform. DoIWin is already the 13th connected offshore grid in our German portfolio. This installation will strengthen the security of energy supply in Germany and Europe.”
A long-term operation
After three years of construction in the Spanish port of Cadiz, the platform was shipped to Rotterdam by TenneT in early August. Then, the service vessel “the Pioneering Spirit” transported the structure to its final destination for the installation campaign.
The 44-meter-high foundation weighing more than 5,000 tons was erected in the first stage. Next, technicians drove ten piles attached to the structure 68 meters below the seabed.
Finally, Pioneering Spirit placed the approximately 11,000 ton superstructure on top of the foundation. The building, with a total length of 82 meters, rises 53 meters above sea level.
Platform operation by 2023
From 2023 onwards, the platform installed by TenneT will convert the alternating current generated by the offshore wind farm into direct current. It will transit through Hilgenriedersiel on the mainland via a 45-kilometer long submarine cable. The electricity will then be supplied to the Emden site via a land cable.
