Project Type: Transmission reinforcement
Location: Aberdeenshire

Contact Details

Liaison Manager

Dav Lynch
Title: Community Liaison Manager
Telephone: 07918 404443
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

Scottish and Southern Electricity Networks Transmission (SSEN Transmission) has constructed a new 400/275kV substation adjacent to the existing transmission line at New Deer, in the North East of Scotland.

The substation has been constructed to operate at a voltage of 275kV, with a view to being upgraded to operate at 400kV in the future. The transmission system in both the North East and East Coast of Scotland will be upgraded to 400kV over the next decade, in order to facilitate this, SSEN Transmission are proposing both upgrading the existing overhead line network in the region and installing new substations at various points.

These works are required to allow increased generation capacity access to the transmission system, while keeping the network fully operable and compliant with all necessary technical standards. Without these necessary reinforcements, the network cannot facilitate all generation connections.

Establishing the substation at New Deer addresses this issue and in effect increases the networks efficiency and capability. Power sharing across these circuits becomes more important as generation load increases on the system.

Progress Gallery

A selection of photographs documenting the project construction progress.

Why New Deer?

There is a significant amount of renewable energy scheduled to connect to the energy transmission network in the North East of Scotland over the next ten years. One of the key generators of this is the Moray Offshore East windfarm, a 900MW offshore windfarm situated in the Moray Firth, which was given consent by the Scottish Government in 2014

It has been determined that New Deer is the optimum location for Moray Offshore East to connect to the GB Transmission Network. To facilitate this connection, there will be two substations built at New Deer. One of which will be owned by Moray Offshore East directly, the other will be owned, operate and maintained by SSEN.

For further information on the Moray Offshore East project, please view their website at the following link - http://www.morayoffshore.com/moray-east/the-project/

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To make use of this function please click on the 'accessibility' button at the top right of the website. 

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.

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.

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. 

New Deer Substation progress video

We have a look back at 2 years of progress at New Deer Substation which captures the development of the site in just 2 minutes. Click on the image to view the video.

Energisation of New Deer Substation

SSEN Transmission announced today yet another important milestone on the pathway to net zero, energising the first g3 gas-insulated substation on its network at New Deer, leading the UK’s electricity industry with the world’s largest installation to date of GE’s g3 SF6-free gas. The new substation will not only facilitate the connection of 900MW new clean renewable energy to the grid from Moray East Offshore Windfarm, but by installing GE’s g3 gas, it is helping to support the transition to net zero emissions and the fight against climate change by reducing SF₆ gas usage on the transmission network. The energisation of the site marks just over two years of hard work for SSEN Transmission and their principal contractors, a consortium of GE and Amey, to bring the substation online. Now energised, the substation forms part of SSEN Transmission’s reinforcement and improvement of the transmission network in the North East and East Coast of Scotland enabling renewable generation to be transported from where it is generated to centres of demand across the country.

New Deer Primary School

Scottish & Southern Electricity Networks (SSEN) Transmission and Amey staff visited the New Deer Primary School this week to talk to the children about keeping road safe and to put their skills to good use, tidying up the school’s eco-garden, repairing and painting some planters and donating some park benches for the children.
Find out more

Project Documentation

North East 400kV & Eastern Reinforcements (Nov 2019)

Related Projects: Alyth 275kV Substation & Reactive Compensation, East Coast 275kV OHL Upgrade, East Coast 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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