ABB has won a significant order from the transmission grid operator TenneT to design, engineer, supply and install an AC power transmission cable system that will connect Butendiek, an offshore wind farm in the German North Sea, to the HVDC converter platform SylWin alpha.
The Butendiek wind farm is situated around 30 km off the island of Sylt. The cable system to be supplied is a 3-core 155 kV AC submarine cable, approximately 38 km long. It is scheduled to be installed and commissioned in 2015. The high voltage cable originally destined for this project was lost in an incident in the Mediterranean Sea in July and ABB was requested to step in and help to support the project schedule.

The cable system will have the capacity to transmit 144 MW of wind power – equivalent to the abatement of almost 750 000 tons of carbon dioxide emissions per year that would have resulted from fossil fuelled generation.

Butendiek is the sixth offshore wind connection project in Germany awarded to ABB by TenneT. ABB is presently executing the Sandbank AC cable link, which also connects an offshore wind farm to the SylWin alpha HVDC converter platform.