The grid operator TenneT awarded a major contract to an Aibel/Keppel FELS consortium in 2019.

Dolwin5 Instagram

Engineering, procurement and installation

The consortium will deliver the HVDC platform (DolWin epsilon) and onshore converter station for the offshore grid connection project DolWin5. Hitachi will supply the complete HVDC electrical power system.

Aibel’s scope within the EPCIC contract and the consortium is the engineering and procurement and Keppel FELS’s yard in Singapore will be constructing the converter platform. After transportation from Singapore to Haugesund, Aibel will install Hitachi’s HVDC conversion equipment, including commissioning, transport and installation of the complete converter platform offshore.

Dolwin epsilon will be installed in the DolWin cluster on the German sector of the North Sea, where the other three DolWin platforms are operating. Among them is DolWin beta, Aibel’s first wind platform delivered in 2015. It is currently the most powerful offshore converter platform in the world.


Contract: EPCIC (engineering, procurement, construction, installation and commissioning)

Client: TenneT

Value: More than NOK 2.5 billion

Delivery: Commissioning planned for 2024

Will have a capacity of 900 MW from three wind parks.

HVDC (high-voltage direct current) is a highly efficient alternative for transmitting large amounts of electricity over long distances.