Siem Begins Nordsee One Cable Laying

Siem Offshore Contractors has started laying the first inter-array cable in the construction area of the Nordsee One offshore wind farm.

The fifty-four turbines will be connected to the offshore substation by ten strings of cables with an overall length of approximately 70 kilometres.

Tim Kittelhake, managing director (COO) of Nordsee One GmbH, said: “In the last month we have successfully installed all 54 foundations for the wind turbines, as well as the foundation for the offshore substation. We plan to install the substation this summer. Currently, we are beginning the cable laying process. First, the cables are laid, and then they are buried into the sea bed by a specialized cable laying vessel. We expect to finish the complete inter-array cable laying works this fall.”

Pierre Lestienne, managing director (CFO) of Nordsee One GmbH, added: “All 54 wind turbines will be connected via the inter-array cables to this offshore transformer substation. This is where the 33 kV power generated by the wind turbines will be converted into a transmission voltage of 155 kV.”

Once completed, Nordsee One wind farm is planned to consist of 54 wind turbines with an overall installed capacity of 332 megawatts. Nordsee One is owned by Northland Power Inc. (85%) and RWE International SE (15%).