Caithness - Moray HVDC Link
- Transmission reinforcement
- Highland, Moray
Stage 5 of 5 complete — This is the final stage of the project where we are fully operational and have reinstated the surrounding environment.
We have completed the construction, commissioning and energisation of the new Caithness - Moray electricity transmission link after four years of construction. Watch this video to find out more about the project:
About the Project
The Caithness - Moray Link will use HVDC technology to transmit power through a 113km subsea cable in the Moray Firth, between converter stations at Spittal in Caithness and Blackhillock in Moray. The project involved work at eight substations and required two overhead line reinforcement projects.
This well established technology allows the efficient transmission of large volumes of electricity across long distances, and routing the cables across the Moray Firth rather than over land ensures greatly reduced visual impact. Reinforcement of the onshore transmission network between Dounreay and Mybster in the north and between Loch Buidhe and Beauly further south will also optimise the existing network along with the new cable.
Along with the installation of the HVDC subsea cable, the project consisted of four further core elements. These encompass work at eight substation sites, two converter stations and two overhead line reinforcement projects.
- Spittal substation and HVDC convertor station
- HVDC subsea cable
- Dounreay to Mybster reinforcements
- Loch Buidhe to Beauly reinforcements
- Blackhillock substation and HVDC convertor station
Throughout the life of our projects, we aim to work positively with local communities and keep people informed about what we are doing. This is particularly important when we are developing a proposal and we want to understand what local people think about our plans.
We endeavour to take the time to discuss proposals with local community councils, encourage engagement from the wider community and listen to the feedback we receive.
We will do our best to answer any questions and address issues or concerns that are raised with us.
When our project progresses into construction, we will continue working closely with the local community to ensure that our work has as little impact on the lives of those living and working in the area and as many long term positive effects as possible.
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Completion of Caithness - Moray transmission link
Caithness-Moray project: Tower being taken down near Thurso
Half year results update
SSEN Transmission is responsible for maintaining and investing in the electricity transmission network in the north of Scotland and our network extends over a quarter of the UK’s land mass, crossing some of its most challenging terrain.
Our operating area is home to vast renewable energy resources, and this is being harnessed by wind, hydro and marine generation. Working closely with National Grid Electricity System Operator (the 'ESO'), we enable electricity generators to connect to the transmission system, allowing the electricity generated by them to be transported to areas of demand across the country.
Following a minority stake sale which completed in November 2022, SSEN Transmission is now owned 75% by SSE plc and 25% by Ontario Teachers’ Pension Plan Board.
SSE plc sold its UK domestic electricity and gas retail business, along with domestic energy services to OVO Energy in January 2020 and no longer manages these customer accounts.
It’s the highest voltage electricity network in the UK – the ‘motorway network’ of the energy world. It transmits large quantities of electricity over long distances via wires carried on a system of mainly metal towers (pylons) and large substations. Transmission voltages in Scotland are 132kV, 275kV and 400kV. Larger generation schemes usually connect to the Transmission system.
The lower voltage parts of the system are called distribution networks. In Scotland, these local networks operate below 132kV whereas in England the distribution network includes 132kV.
As a stakeholder-led business, throughout the life of our projects, we aim to work positively with local communities and keep people informed about what we are doing. This is particularly important when we are developing new projects, we want to understand what local people think about our plans.
We always endeavour to take the time to discuss our proposals with local community councils and the wider affected community and to carry out engagement throughout each of the development stages, listening to feedback before finalising project plans. The feedback we receive is vital to help us develop proposals that reflect the views of a variety of stakeholder.
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