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.  

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.

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