Tealing Substation Extension
- Type
- Transmission reinforcement
- Rating
- 275kV
- Location
- Angus
Overview
Status: Construction Phase
Stage 4 of 5 complete — This is the stage where we mobilise our people, contractors and equipment. The project is well underway at this point.
About the Project
We are proposing to upgrade the existing 275kV east coast transmission network to enable the connection of onshore and offshore renewable electricity to Great Britain’s transmission network, allowing the onward supply of power to centres of demand. A significant number of projects are being developed on the east coast of Scotland to enable these connections and to strengthen the network serving the region.
Seagreen Wind Energy Limited (SWEL) Offshore Wind Farm requires connection to our network. To facilitate SWEL's connection, we require the extension of the existing Tealing Substation by approximately 60 x 100 metres to the east. In addition to the substation extension works, there are also planned upgrades to the current plant and infrastructure within our existing substation.
Why is the Project Required?
As the transmission network owner for the north of Scotland, we are responsible for the maintenance and development of the transmission network in an economic, efficient and co-ordinated manner. As part of our statutory and transmission licence obligations, we have a number of duties including:
- the development and maintenance of an efficient, coordinated and economical system of electricity transmission
- to facilitate competition in the supply and generation of electricity
- to ensure that the security of the network is maintained as the demand and/or generation connections change over time
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.
Seagreen Wind Energy Ltd (SWEL)
Seagreen Wind Energy Ltd is a £3bn offshore wind farm development owned by SSE Renewables (49%) and Total (51%). Once complete, the project will take on the title of Scotland’s largest offshore wind farm with 114 turbines and a capacity of 1,075MW.
In 2010, Seagreen was awarded exclusive development rights by The Crown Estate for the Firth of Forth zone of the UK’s Round 3 offshore wind farm development programme.
Seagreen phase one within the zone includes the development of two windfarms, 'Seagreen Alpha' and 'Seagreen Bravo', located over 27km from the Angus coastline with a potential combined capacity of up to 1.5GW.
The offshore consent for Seagreen phase one was received in 2014 (confirmed in 2017 following legal challenge). In March 2018, Seagreen submitted an application to Marine Scotland seeking to remove the consented capacity limit to utilise the latest advances in wind turbine technology. This application was approved in August 2018.
In 2013, the onshore consent (Planning Permission in Principle) was received from Angus council and extended in December 2016 following re-application by Seagreen. Seagreen phase one will be, at its nearest point, located approximately 27km from the Angus coastline covering an area of around 400Km2 in the outer Firth of Forth.
The electricity will be delivered by subsea and then underground cables from landfall at Carnoustie to a new onshore substation at Tealing for onward transmission on the national electricity transmission system.
Find Out More About Seagreen Offshore Wind Farm
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.
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.
Project Updates

Abnormal load delivery - 23rd November
SSEN Transmission would like to make you aware of the rescheduled abnormal load delivery to Tealing substation. We will now be taking an alternative route via Aviemore on Thursday 23rd November and Wednesday 29nd November. The convoy will be escorted by Police Scotland and specialist abnormal load escort vehicles, due to arrive into the Tealing area around 22:00. There may be disruption to your journey whilst the convoy is passing through.
To minimise noise impacts, offloading will commence the following day after delivery.
Please see the below map showing the convoy’s route of entrance to Tealing Substation.
As part of SSEN Transmission upgrade works in the North East of Scotland, transitioning from 275kV to 400kV operation, there is a need to replace two Super Grid Transformers at the existing Rothienorman substation. Two new 400/33kV SGTs were successfully delivered to Rothienorman in October 2022 and it has now come the time to remove redundant 275/33kV SGT units and transport them for strategic storage at Tealing substation, further to re-deploying them on a future project. To facilitate these movements, SSEN Transmission’s contract partner Balfour Beatty have employed specialist heavy haulage contractor J.B Rawcliffe & Sons to carry out the task. The first SGT unit is due to leave Rothienorman site mid-morning on 22nd of November 2023 then following onto the A96 via Keith before turning onto the A95 to Aviemore. On the 23rd November the convoy will take the A9 to Perth and be held until 8pm where it will go along the A90 towards Tealing. The convoy will be escorted by Police Scotland and abnormal load escort vehicles and will be due to arrive to Tealing area around 22:00 on the same day. It is expected to encounter partial congestion during transit of the convoy, however there will many opportunities to overtake the slow-moving traffic, as managed by Police Scotland. The second transformer move is planned to arrive on the 29th of November and will follow the same route & associated timings as the first delivery.
If you would like any further information please do not hesitate to get in touch with the Community Liaison Manager – Rhiannon Merritt (Rhiannon.Merritt@sse.com, 07721 407513).

November CLG Meeting Minutes

Festive Period Site Closure
Our Principal Contractor Balfour Beatty’s works at Tealing substation will pause for the festive period from Friday 23 December until Wednesday 4 January 2023.
Construction activities will recommence from Tuesday 10 January 2023.

August CLG Meeting Minutes

Site Deliveries

May CLG Meeting Minutes

CLG Minutes

Upcoming Activities

Successful completion of Seagreen connection at Tealing substation

Project Update - December 2021

Tealing CLG

Security Light Testing

Progress Video

Emmock Road

Transformer Delivery

Community Liaison Group (CLG)

Project Update - November

Extension to Working Hours

Additional Lighting on Site

Project Update - September

Weekend Working

Planning Application Determination
Project Documents
-
Tealing CLG Meeting 8 Minutes
- Type:
- Date:
- 17 May 2023
- Size:
- 308.4 KB
-
Tealing CLG Meeting 7 Minutes
- Type:
- Date:
- 01 December 2022
- Size:
- 387.8 KB
-
Tealing CLG Meeting 6 Minutes
- Type:
- Date:
- 30 October 2022
- Size:
- 255.2 KB
-
Tealing CLG Meeting 5 Minutes
- Type:
- Date:
- 30 October 2022
- Size:
- 232.6 KB
-
40mph restriction - Emmock Road
- Type:
- Date:
- 18 September 2022
- Size:
- 461 KB
-
Information Booklet - May 2022
- Type:
- Date:
- 18 September 2022
- Size:
- 11.2 MB
-
North East 400kV & Eastern Reinforcements (Nov 2019)
- Type:
- Date:
- 18 September 2022
- Size:
- 4.5 MB
-
Tealing CLG 4 Minutes
- Type:
- Date:
- 18 September 2022
- Size:
- 231.6 KB
-
Tealing CLG Meeting 1 Minutes
- Type:
- Date:
- 18 September 2022
- Size:
- 258.7 KB
-
Tealing CLG Meeting 2 Minutes
- Type:
- Date:
- 18 September 2022
- Size:
- 201.7 KB
-
Tealing CLG Meeting 3 Minutes
- Type:
- Date:
- 18 September 2022
- Size:
- 251.5 KB
-
Tealing Substation Extension CLG Terms of Reference
- Type:
- Date:
- 18 September 2022
- Size:
- 304.9 KB
Project Gallery
Progress Gallery
Project FAQs
FAQs
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