The Caithness-Moray Link, Scotland

Investment in the renewable energy sector in Scotland has increased significantly over the past ten years. At the end of 2015, Scotland had a total installed renewable electricity generation capacity of 7.7 GW with an additional 13 GW in planning, consented or in construction. 

To accommodate this newly constructed generation capacity and ensure the future security of energy supply across the UK, a major reinforcement of the transmission network serving the north of Scotland is required. 

The Caithness-Moray project represents a £1.1bn capital investment by SSEN, centred on a submarine cable capable of carrying up to 1,200MW beneath the Moray Firth. With associated reinforcement of the existing onshore transmission network, the project will represent the largest investment in the north of Scotland’s electricity network since the hydro development era of the 1950s. 

The link connects the electricity grid on either side of the Moray Firth using world-leading and well established HVDC cable technology from NKT with a minimal visual impact. It has the capacity to carry up to 1,200 MW (megawatt) of electricity – equivalent to the electricity needs of about two million people. 

The installation of the 113 km long submarine cable system in the ploughed trench in the seabed was the maiden project of our purpose-built cable-laying vessel NKT Victoria. It can hold 9,000 tons of power cable and offers state-of-the-art cable-laying capability. 

HVDC extruded cable system, including 2x113 km of submarine and 2x20 + 2x28 km of underground XLPE cables

160 km installed

Turnkey HVDC 320 kV cable system solution with a 1,200 MW power rating

Started on 2014 and ongoing

Scottish and Southern Electricity Networks (SSEN)

Moray Firth, Scotland



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