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: Project Refinement

Project Overview

The proposed development is located in the Local Authority area of The Highland Council, between Aberarder Estate and Dunmaglass Estate. The new overhead line (OHL) would extend for approximately 5km from the proposed Aberarder windfarm substation, teeing into the existing Dunmaglass 132kV OHL.

The OHL was initially specified as wood pole trident, however after engineering design wood pole is not considered suitable for the site location due to altitude and climatic conditions.  An options assessment was completed to identify suitable structures for the local conditions. 

The proposed new single circuit OHL will utilise metal monopole supports from the Aberarder substation for 4.7km from where wood pole supports will be used for approximately 0.3km to tee into the existing Dunmaglass wood pole line.

The circuit is proposed to be constructed using metal pole supports which are part of an ongoing development of New Suite of Transmission Structures (NeSTS), as an alternative to metal lattice towers.


The proposed NeST structures are single pole structures with three offset, cantilevered arms supporting the insulators and a top-mounted earth wire. The earthwire will be an optical ground wire (OPGW) incorporating fibre optic strands which are used for communication associated with protection and control of the network. The nominal height of the proposed metal pole supports is 24m, although extensions currently required for some of the structures to account for topographical features means their maximum height along the proposed line maybe up to 36m.

More information on the NeSTS structures can be found via this link.

Why is the Project Required?

The Developer, RES UK and Ireland Ltd have accepted a transmission connection offer in respect of their windfarm development at Aberarder wind farm.

As part of its statutory and transmission licence obligations, SSEN Transmission has a number of duties including:

  • 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, and
  • the development and maintenance of an efficient, coordinated and economical system of electricity transmission.

The National Electricity Transmission System Security and Quality of Supply Standard (NETS SQSS) provides the criteria that SSEN Transmission must use to plan and design the transmission system. The defined criteria ensures the security of the Main Interconnected Transmission System (MITS).

Our Engagement

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.

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. 

Section 37 Application

SSEN Transmission has applied to the Scottish Ministers for consent under Section 37 of the Electricity Act 1989 to construct and operate approximately 5.25km of single circuit 132kV overhead line between the proposed Aberarder wind farm substation and the existing Dumnaglass woodpole 132kV trident line. A copy of the application, with a plan showing the land to which it relates, is available for public inspection in person, free of charge, during normal office hours at Highland Council Inverness Service Point Normal office hours Monday, Tuesday, Thursday & Friday: 9 am - 5 pm Wednesday: 10 am - 5 pm Town House Castle Street Inverness V1 1JJ and Farr Community Hall Inverarnie Park Farr IV2 6XF The application can also be viewed at 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. Written or emailed representations should be dated, clearly stating the name (in block capitals), full return email and postal address of those making representations. Only representations sent by email to will receive an acknowledgement. All representations should be received not later than 22nd July 2019, although Ministers may consider representations received after this date. The link below will take you to the application, using the simple search type Aberarder into Search by Project Name: then click on go.

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