Project Type: Transmission reinforcement
Location: Angus

Contact Details

Liaison Manager

Louise Anderson
Title: Community Liaison Manager
Telephone: 07384 454233
Address: Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ

Land Manager

Robyn Taylor
Title: Land Manager
Telephone: 07778 380673
Address: 200 Ashgrove Road West, Aberdeen, AB16 5NY
Status: Construction Phase

About the Project

As the transmission network owner for the north of Scotland, Scottish Hydro Electric Transmission (SHE Transmission), a subsidiary of SSE as part of Scottish and Southern Electricity Networks (SSEN) is responsible for the maintenance and development of the transmission network in an economic, efficient and co-ordinated manner.

SHE Transmission is proposing to upgrade the existing 275kV East Coast transmission network to enable new generation to link to Great Britain’s transmission system, allowing the onward supply of power to centres of demand.

We are developing a significant number of projects on the East Coast of Scotland to strengthen the network serving the region and allow developers of onshore and offshore renewable electricity to connect. One of these developers being Seagreen Wind Energy Limited (SWEL).

To facilitate SWEL's connection SHE Transmission requires to extend 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.  

Progress Gallery

 A selection of photographs taken on site documenting the project construction progress.

Why is the Project Required?

As part of its statutory and transmission licence obligations, SHE Transmission has 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, and
  • to ensure that the security of the network is maintained as the demand and/or generation connections change over time.

SHE Transmission has a licence obligation to invest in its existing assets to maintain network health and condition. SHE Transmission also has a statutory duty under the Electricity Safety, Quality and Continuity Regulations 2002 to ensure that the electricity transmission network is fit for purpose.

Our Approach

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.

Seagreen Wind Energy Ltd (SWEL)

Seagreen Wind Energy Ltd is an offshore wind farm development wholly owned by SSE. 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.

For more information on SWEL's substation please click here

The data in this map is provided for indicative purposes only and may be subject to change. Scottish Hydro Electric Transmission plc do not accept responsibility for its accuracy, completeness or validity. The data should not be copied, reproduced or utilised externally without permission.

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. 

How and to what extent are electricity consumers' interests considered?

SHE Transmission are regulated by the Office for Gas and Electricity Markets (Ofgem), the regulator responsible for representing consumers' interests. Electricity consumer interests are therefore one of our key drivers and this is enshrined in our statutory duties under the Electricity Act.


In particular we have a statutory duty to develop, maintain and operate an efficient, economic and co-ordinated transmission system. Since the costs of these projects will ultimately be paid for by electricity consumers, we have a responsibility to take cost into account with due weighting in a comparison against other important factors.

Project Update - September

Progress on the Tealing substation extension project has been progressing well. Civil works on the platform extension is nearing completion, the most recent milestone reached has been getting the permanent external perimeter fence erected. The dismantling of the old substation equipment is now all complete and the installation of the new plant and equipment is progressing well on both the new extension and within the existing substation. The new 275kV modular control building is now installed and fitted out and panel installation complete. Commissioning activities have also now commenced and will continue as the project works towards an energisation date of 10 November 2020. The project has a rolling number of outages on the network until December 2021 in order to complete the remaining dismantling and rebuild of the 275kV busbar and associated equipment.

Weekend Working

In order to carry out the essential rebuild of the east of the substation and connect in the extension and to ensure network security is maintained to return a completed rebuild, including the extension to the existing Tealing substation, Angus Council has approved for our Principal Contractor to work the following Sunday's to achieve this and complete works before winter running resumes on the network. 14th and 28th June, 12th & 26th July, 9th and 23rd August, 6th and 20th September, 4th &18th October and 1st, 15th and 29th November. Works that will be carried out include: Complete the build to the extension and to Tealing substation including installation of plant & equipment, installation of permanent perimeter fence, complete external landscaping, testing and commissioning. To ensure local residents are disturbed as little as possible there will be no deliveries to site out with normal working hours. The duration's of any plant movements will be restricted to no more than 25 minutes continuous movements. Works will also take place on site on Saturdays beginning this Saturday 13th June until 19th December with working hours proposed at 8am - 6pm. Work will be taking place across the whole site on Saturday's.

Planning Application Determination

To facilitate the Seagreen Wind Energy Limited connection, and for SHE Transmission's substation at Tealing to be extended SWEL submitted a planning application to Angus Council on the 5th of July 2019 under reference 19/00534/MSC. As our extension is required for the Seagreen development, an agreement with Angus Council was reached whereby consent for SHE Transmission’s extension was incorporated as part of Seagreen’ s planning application for the detail of their site. That planning application was approved by Angus Council on 21st January 2020.

North East 400kV & Eastern Reinforcements (Nov 2019)

Related Projects: Alyth 275kV Substation & Reactive Compensation, East Coast Onshore 275kV OHL Upgrade, East Coast Onshore 400kV OHL Upgrade, Kintore 400kV Substation, North East 400kV, Peterhead Substation, New Deer Substation, Rothienorman Substation, Tealing Substation Extension

File Type: pdf
Published: 19 May 2020

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