Seagreen offshore substation topside complete


United Kingdom – Seagreen, Scotland’s and the world’s largest fixed offshore wind farm, currently under construction off the coast of Angus, and has completed installation of the 4,800-tonne offshore platform topside.

The offshore wind farm’s backbone is the topside. The heavyweight superstructure, which is 40 meters long, 45 meters wide, and 15 meters high, collects and manages the 1,075MW of power generated by the 114 Vestas wind turbines before transferring it ashore via 60 kilometers of offshore subsea cabling.

Once onshore, the electricity is routed through a 19-kilometer cable to the new Tealing substation near Dundee, where it is distributed to homes and businesses via the national electricity network.

Offshore platform

The topside was lifted onto the previously installed 6-legged jacket foundation from a heavy transport vessel. The completed structure will be one of the largest AC platforms in UK waters, sitting in water depths of around 55 meters.

The onsite inter-array network of cables to the turbines and the offshore platform will be installed by specialist cable installation and support vessels. Another vessel is currently laying the export cable from Carnoustie’s landfall point. Early in 2023, the Seagreen Wind Farm will begin operations.