Overview
About the Project
With the successful energisation of Alyth substation at 275kV in 2024 we are now preparing to upgrade the substation to 400kV as part of our work under the East Coast 400kV Upgrade suite of projects.
Following the East Coast Onshore 275kV Upgrade works which the initial build of Alyth substation was part of the north to south power flows remains limited by the thermal capacity of the East Coast overhead lines between Kintore, Fetteresso, Alyth and Kincardine. Uprating these circuits to operate at 400kV combined with the requirement to replace the existing phase conductors addresses this by increasing the thermal capacity and improving sharing across the remaining 400kV and 275kV circuits.

Why is the Project Required?
We have a licence obligation to invest in our existing assets to maintain network health and condition. We also have a statutory duty under the Electricity Safety Quality and Continuity Regulations 2002 to ensure that the electricity transmission network is fit for purpose.
This strategic grid reinforcement is deemed to be essential for providing the transmission capacity necessary to realise the potential of Scotland’s renewable energy resources, maintaining long-term security of electricity supply supporting sustainable economic development.

Live Osprey Webcam
Ospreys have nested near Alyth for many years. Historically, they nested on the top of a 275kV tower which forms the ‘T’ junction between the main strategic electricity transmission line for the east coast of Scotland and Tealing Substation near Dundee. A 25-metre osprey nesting tower and two nearby 8.5 metre resting perches were erected on the 12th March 2014 under planning permission and have been successfully used by the Ospreys since.
View live footage of the nest below:
Community Engagement
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.

How we’re embracing artificial intelligence (AI)
We intend to use AI to assist our experienced teams in the analysis of your feedback, so we can categorise key points raised more quickly. You can learn more about how we’re utilising AI on this dedicated web page.
Project Updates
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Re-Mobilisation
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Documents
Project Newsletter
Community Liaison Group Meeting Minutes
Project Documents
Gallery
Progress Gallery
A selection of photographs taken from site documenting the project construction progress.
FAQs
FAQs
Latest Links
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New Alyth Substation Powers Up
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