Heerema’s Sleipnir installs Neart na Gaoithe OWF’s first substation

Heerema Marine Contractors has completed the installation of the first of the project’s two offshore substations at the Neart na Gaoithe (NnG) offshore wind farm, which is currently under construction 15 kilometers off the coast of Fife.

It is now possible to connect NnG to the national grid ahead of the project’s 2023 deadline for the installation of its 54 wind turbines. In order to install the 1100 metric ton topside, Saipem, NNGOWL’s Foundations EPCI Contractor, used Heerema‘s Sleipnir, which is the largest offshore wind installation vessel in the world. Saipem’s in-house design team in London created both foundation jackets, which were then built at Saipem’s fabrication yard in Indonesia, on Karimun Island.

Last year, the Saipem 7000 and Saipem 3000 construction vessels prepared the innovative “rock socket” seabed supports for the jackets, anchoring the offshore substation to the seabed in a depth of approximately 50 meters.

Low-carbon electricity

Upon completion, NnG’s two offshore substations will export power generated by the offshore wind farm turbines to NnG’s onshore substation, which in turn connects to Crystal Rig in the Lammermuir Hills, East Lothian.

Midway through 2023, the first of the wind farm’s turbines will be put into service, and the entire project is expected to be completed by 2024. EDF Renewables and ESB will own and operate NnG, which will have a generating capacity of around 450MW. More than 400,000 tons of CO2 will be offset each year by the plant’s low-carbon electricity.

Image source: Heerema

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