SPAIN – The offshore platform DolWin kappa is currently being built in a shipyard in Cádiz, to be delivered to the Netherlands in late summer 2022.

DolWin6 is a 900 MW DC connection commissioned for construction by TenneT in July 2017. On the associated offshore platform DolWin kappa, the three-phase current generated by the offshore wind farms is converted into direct current and transported to Hilgenriedersiel on the mainland by an approximately 45-km (27-mile) long sea cable.

From the landfall in Hilgenriedersiel the electricity is transmitted to Emden via another 45-km land cable. Here, TenneT is building a converter station and a transformer station to convert the direct current back into three-phase current and feed it into the power grid onshore.

On a recent press trip to the construction yard, the TenneT project team of Daniel Birkenstock and Lutz Buchholz with the COO Tim Meyerjürgens gave national and international media representatives insights into the engineering works and the company’s efforts to tackle Europe’s climate targets, TenneT said in a press release.

Tennet’s partner Siemens Energy is supplying the technology needed for the HVDC transmission systems. Dragados Offshore is in charge of the actual construction and the installation of the platform.

DolWin kappa’s topside is approximately 32 m (104 ft) high, 78 m (255 ft) long and 37 m (121 ft) wide with a weight of roughly 11,300 tonnes.

The DolWin kappa platform should be delivered from Spain to the Netherlands in late summer 2022 and subsequently installed in the German North Sea, TenneT said in a media release.


Source: TenneT