Project Type: Windfarm connection
Location: Highland

Contact Details

Liaison Manager

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

Land Manager

Alistair Nicolson
Title: Land Manager
Mobile: 07741 127786
Address: 10 Henderson Road, Longman Industrial Estate, Inverness, IV1 1SN
Status: Operational

About the Project

The aim of the project is to develop and construct a transmission connection to connect Glen Kyllachy windfarm to the new substation at Tomatin via wood pole.

There will be cable entry to the Tomatin substation, therefore there will be a point where the overhead line will drop and an underground cable will complete the final stretch of the route.

To find out more about the new Tomatin substation that was completed and energised towards the end of 2019, please click here

Progress Gallery

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

Why is the Project Required?

As the transmission licence holder in the north of Scotland we have a duty under Section 9 of the Electricity Act 1989 to facilitate competition in the generation and supply of electricity. We have obligations to offer non-discriminatory terms for connection to the transmission system, both for new generation and for new sources of electricity demand.

The aim of the project is to enable renewable energy to connect to our transmission network. Under our Network Operators Licence this connection should be efficient, co-ordinated and economic, whilst having the least possible impact on the environment.

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. 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.

Recite Me

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

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.

How are proposals scrutinised?

The Scottish Ministers are responsible for determination of applications submitted under Section 37 of the Electricity Act 1989. Both statutory consultees and members of the public have the right to submit their representations on the application. All representations will be considered by Scottish Ministers in their determination of the application.
The Office for Gas and Electricity Markets (Ofgem), as the regulator, has to approve all investment so project proposals are developed under license conditions.
Preferred route corridors chosen will comply with revised ‘Holford Rules’ which are the recognised industry approach to routeing overhead lines amended to reflect Scottish circumstances.

What are The Holford Rules?

The Holford Rules originated in 1959 as the result of work by Lord Holford, a part-time member of the Central Electricity Generating Board (National Grid's predecessor). The Holford Rules have been augmented by both National Grid and SHE Transmission plc to reflect environmental legislation and best practice in recent years. We have continued to use them as a valuable set of guidelines for reducing the impact of our assets on landscapes.
The guidance recommends appropriate application of the Holford Rules to inform routeing. These rules advocate the application of a hierarchical approach to routeing which first avoids major areas of highest amenity, then smaller areas of high amenity, and finally considers factors such as backdrop, woodland and orientation. The Holford Rules apply the term ‘amenity’ to refer to environmental designations and classifications such as Natura 2000 sites, Sites of Special Scientific Interest (SSSI), Scheduled Monuments, Listed Buildings, National Parks.
The guidance also recognises that the key effect of overhead lines is visual and it advises that the routeing of overhead lines should consider the types of mitigation (screening) that could offset any visual effects.
In their National Policy Statement EN-5, the Government has stated that the Holford Rules “should be followed by developers when designing their proposals.” Their use is therefore Government policy, rather than a voluntary choice of SHE Transmission plc.

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. 


We have marked a significant milestone on the journey to net zero emission as we announce the energisation of the Glen Kyllachy wind farm transmission connection. The new connection consists of a new overhead line, underground cable circuit and a brand new substation at which the windfarm will connect to the national grid. The new substation will not only facilitate the connection of new renewable energy to the grid, it will also be home to the first SF6-free Siemens Clean Air Power Voltage Transformers on the GB Transmission network, helping to support the transition to net zero emissions and the fight against climate change by removing SF6 gas.

Project Update - December

The Glen Kyllachy wind farm connection project has made great progress over the last 5 months and as the site prepares to close for the Christmas break we wanted to provide a project update. The wood pole overhead line is now largely complete, all the poles have been erected and the conductors (the wires) have been strung and with this, our overhead line Principal Contractor, Norpower, will demobilise from site prior to the festive period. Norpower will return in early Spring to make the final connection into Glen Kyllachy substation. Works on the underground cable are also complete. The cables have been installed and testing took place on the 4th December. Our underground cable Principal Contractor, Morgan Sindall Infrastructure, will also demobilise from site prior to the festive period. Omexom our substation Principal Contractor are still on site and the substation works are ongoing. Concrete bases for the structures have been installed and the circuit breaker is on site. Works still required to be carried out at the substation involve the structures being erected and the installing of operational equipment. The site will close on Friday 18th December, apart from a delivery on 21st December, and re-open on Tuesday 5th January.

Overhead Line Works

October sees the Glen Kyllachy Wind Farm Connection project welcome Norpower, our overhead line Principal Contractor, to site for the commencement of the erecting of the wood pole line. As with our other Principal Contractors all access to site will continue to be taken via the windfarm haul road and no HGVs or construction traffic will access site through the village of Tomatin. This now completes the arrival of all of our Principal Contractors who will be undertaking the cabling, substation and overhead line works.

Substation Principal Contractor

This week we will be welcoming Omexom, our Substation Principal Contractor, to site for the commencement of the Glen Kyllachy substation work. All site access will continue to be taken via the windfarm haul road and no HGVs or construction traffic will access site through the village of Tomatin. As a responsible developer we will ensure that we keep the local community and all stakeholders informed as the project continues to progress.

Construction Commences

Following the decision by Scottish Ministers made in February of this year to approve our application to install a new 132kV overhead line (OHL) to connect the consented Glen Kyllachy Wind Farm, our Principal Contractor for the cable works associated with this project, Morgan Sindall Infrastructure will begin setting up their site compound from 9 July 2020 in order to commence the start of construction on the Glen Kyllachy Wind Farm Connection Project. The site compound will be situated on an existing hard stand beside Tomatin Substation. We anticipate the set up of the compound to take approximately one week which will be followed by the commencement of installing necessary temporary access tracks.

Planning Application Determination

The application under Section 37 of the Electricity Act 1989, to install and keep installed a new 132 kilovolt (kV) overhead line (OHL) of approximately 1,500 metres in length to connect the consented Glen Kyllachy Wind Farm to the National Grid has now been determined and we welcome the decision by Scottish Ministers to approve our application. We anticipate the works on the OHL to commence in June 2020.

Planning Application Submission

SSEN Transmission has applied to the Scottish Ministers for consent under Section 37 of the Electricity Act 1989 to install and keep installed a new 132 kilovolt (kV) overhead line (OHL) of approximately 1,500 metres in length to connect the consented Glen Kyllachy Wind Farm to the National Grid. The OHL shall be supported by trident ‘H’ wood poles. The proposed development is located at Garbole, Tomatin which is approximately 20 Km south of Inverness. The location of the proposed development is presented on Figure 1, and the site layout is presented on Figure 2 that can be found under project documentation. SSEN Transmission has also requested a direction under Section 57(2) of the Town and Country Planning (Scotland) Act 1997 that planning permission for the development be deemed to be granted. A copy of the application, is available for inspection, free of charge. This can be accessed during normal opening hours at Tomatin village shop. Any representations to the application may be submitted via the Energy Consents Unit website at; by email to The Scottish Government, Energy Consents Unit mailbox at or by post, to The Scottish Government, Energy Consents Unit, 4th Floor, 5 Atlantic Quay, 150 Broomielaw, Glasgow, G2 8LU, identifying the proposal and specifying the grounds for representation.

Environmental Appraisal Report

Related Projects: Glen Kyllachy Wind Farm Connection

File Type: pdf
Published: 20 May 2020
Figure 1 Location Plan

Related Projects: Glen Kyllachy Wind Farm Connection

File Type: pdf
Published: 20 May 2020
Figure 2 Site Layout Plan

Related Projects: Glen Kyllachy Wind Farm Connection

File Type: pdf
Published: 20 May 2020

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