About the project

The aim of this project is to reinforce Carradale Substation in order to enable renewable generation connection requests. The project elements include:

  • Replacement of two 60 MVA rated transformers replaced with two 120MVA transformers by the end of 2020
  • Replacement of two 90 MWA rated transformers replaced with 120MVA transformers by Summer 2022
  • Minor modifications  to existing equipment to accommodate the larger transformer size, including earthing, fencing, positioning and substation equipment works.
  • Associated 33kV cabling works will also be required to enable the connection of contracted renewable developments in the area.

 To undertake the works, a site compound will be required for the duration of the project. This will be implemented in advance of construction and installation works and decommissioned once all necessary works are complete. The compound will comprise of site welfare and laydown facility and will be situated in close proximity to the existing grid supply point. Enabling works are due to take place throughout the end of 2019 into early 2020. 


 Notice of Road Closure - December 2020

As part of our ongoing Carradale Substation Project, we will soon be assembling the first transformer on site. The delivery of the transformer will mean a section of the B842 will be closed between approximately 9.30am – 11.00am on Monday 14th December 2020. The section of the B842 which will be closed is between Brackley and the Carradale substation.

Before travelling on the B842, the vehicle route is from Glasgow to Loch Lomond (A82), north to Crainlarich then Tyndrum, left onto the A85 to Dalmally, left onto A819 to Inveraray, onto A83, through Lochgilphead then Tarbert until it reaches Killean where it will turn left onto the Cross Kintyre Haul Road (XKHR).

While travelling on these A roads the vehicle will pull in at intervals to allow traffic to pass. The vehicle will travel over the XKHR from Killean to Brackley on Sunday 13/12/20 and stop overnight at the road end (Brackley), where it will remain until the road closure is in place on the B842 on the morning of Monday 14/12/20.

We anticipate further road closures will be required over the coming months and we will contact local residents  regarding these nearer the time and continue to post updates on this webpage. 

Why is the project required?

As the transmission licence holder in the north of Scotland we have a duty under Section 9 of the Electricity Act 1989 to facilitate competition in the generation and supply of electricity. We have obligations to offer non-discriminatory terms for connection to the transmission system, both for new generation and for new sources of electricity demand.

Requests have been made to National Grid by a number of wind farm developers in Argyll and Bute for grid connections in the Argyll and Kintyre area. We are responsible for providing the infrastructure required to connect the wind farms to the electricity network. In order to facilitate these connections, reinforcement of the existing transmission network, owned and operated by Scottish Hydro Electric (SHE) Transmission is required.


Who is Scottish and Southern Electricity Networks?

Scottish and Southern Electricity Networks is the trading name of Scottish and Southern Energy Power Distribution Limited, Scottish Hydro Electric Transmission plc, Scottish Hydro Electric Power Distribution plc and Southern Electric Power Distribution plc.

How are Transmission network upgrades paid for?

Investments in projects are made by SHE Transmission plc. Electricity transmission companies are authorised to recover the costs of such investments through 'use of system' charges which are levied by National Grid Electricity Transmission plc on generators and suppliers of electricity. Suppliers recover their costs from all electricity customers. In order to protect the interests of customers, the transmission companies have to demonstrate to the energy regulator, Ofgem (Office for Gas and Electricity Markets) that proposed investments are necessary, are efficient and are economical so that the charges which are ultimately levied on all electricity customers are justified.

This means SHE Transmission is subject to a funding mechanism established by Parliament and regulated by Ofgem. Cross subsidies between different businesses in the SSE group is not permitted.

What is the transmission network?

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. 

Argyll and Bute Information Sharing Webinar

On Wednesday 17th March, SSEN Transmission hosted an Argyll and Bute Information Sharing Webinar, to provide local stakeholders with an interest in future electricity network plans for Argyll and Bute the chance to join us to hear about our stakeholder-led plans for the future and receive an update on the current construction and operation activities in the region. For those who were unable to attend, we have uploaded a recording of the session which you can view by clicking on the adjacent video.

Notice of Road Closure - Dec 2020

As part of our ongoing Carradale Substation Project, we will soon be assembling the first transformer on site. The delivery of the transformer will mean a section of the B842 will be closed between approximately 9.30am – 11.00am on Monday 14th December 2020. To find out more, please see our full notice on the Project Documentation tab. For any questions, please do not hesistate to contact the project Community Liaison Manager.

Preliminary Construction Activity

Work is due to commence on the Carradale Substation this week with activity contained to the substation compound where our contractors Omexom are due to be on site, breaking out existing concrete bases. This work will continue into W/C 24th Feb, where field drainage will commence in the North field. Once drainage is completed, a hard standing area for welfare will be created in North field which will require HGV stone deliveries for around a fortnight from W/C 9th March. Welfare will then be delivered to site and set up, which will involve HGV deliveries of cabins and a new passing place will be created which will require temporary road works on the B road, likely in the form of stop go boards.

Carradale Community Open Day - Planning for Your Future

Representatives from SSEN Transmission were kindly invited to attend the Carradale Community Open Day by East Kintyre Community Council and attended to present plans for the Carradale Substation Project. Staff members enjoyed a warm welcome and a chance to meet with many of the local community members whilst also having a chance to find out more about upcoming development plans in East Kintyre.

Carradale Hand Out - November 2019

SSEN - Carradale Hand Out - November 2019
File Type: pdf
Published: 13 Nov 2019
Road Closure Notice - December 2020
File Type: pdf
Published: 08 Dec 2020
Argyll and Bute Information Sharing Webinar - March 21 - Slide Deck
File Type: pdf
Published: 18 Mar 2021

Sign up for project updates

To keep informed of all that is happening on this project, please complete your details below and provide consent to enable us to send you updates via email

For information on how we collect and process your data, please see our privacy notice at www.ssen.co.uk/PrivacyNotice/. If you do not have access to our website, or would like to receive a hard copy, please contact us.