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Caithness–Moray link energised in Scotland [free access]

January 14, 2019

Scottish Hydro Electric Transmission plc (SHET), a subsidiary of UK-based power company SSE plc, has completed the construction, commissioning and energisation of the 1,200 MW Caithness–Moray electricity transmission link, both on time and under budget.


The GBP1.11 billion link involved the construction of a 113 km, high voltage direct current (HVDC) undersea cable link to connect onshore power conversion stations at Blackhillock in Moray and Spittal in Caithness. Constructed over a period of four years, the project also involved the replacement of an existing 132 kV overhead line (OHL) between Dounreay and Spittal, with a 275 kV OHL via a new substation to the south of Thurso, along with the construction of an additional 132 kV OHL between Spittal and Mybster, where the existing substations were extended.


Completed on time and within the allowance approved by the UK’s energy regulator Office of Gas and Electricity Markets (Ofgem), the link will provide up to 1,200 MW of capacity to evacuate electricity from renewable energy projects in Moray Firth in northern Scotland and transmit it to the more densely populated southern Scotland.


As of now, the link has already enabled turbines from the Beatrice offshore wind farm (588 MW) and Dorenell onshore wind farm (177 MW) to connect to the national grid. However, a further 100 MW of onshore generation in Caithness and Ross-shire is due to connect in the coming months.


(GBP 1=USD1.29)