Project Type: Windfarm connection
Location: Highland

Contact Details

Liaison Manager

Lisa Marchi
Title: Community Liaison Manager
Telephone: 01463 728072
Mobile: 07825 015507
Address: 10 Henderson Road, Inverness, IV1 1SN

Land Manager

Stephen Bodie
Title: Land Manager
Mobile: 07876 836578
Address: Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ
Status: Early Development

Project Overview

SSEN Transmission are proposing to construct a new single transformer 132/33kV substation, complete with single transformer within the new substation compound located at Sallachy Wind Farm along with a single circuit 132kV wood pole line over a distance of approximately 6km between the 132/33kV substation facility at the Sallachy development site and SSEN Transmission's 132/33kV substation at Cassely.

The 132kV line will be built using portal wood pole "H" type construction, and strung with 150mm ACSR conductors to meet the wind farms connection capacity.

At the Cassley 132/33kV substation, a 132kV feeder circuit breaker bay will be installed. The bay will include a single 132kV circuit breaker unit, a single 132kV line disconnector, and associated busbar extensions, support structures, protection control and metering equipment. The incoming 132kV line circuit from Sallachy will terminate on support structures adjacent to the 132kV circuit breaker. Also the Cassley 132kV transformer disconnector will be replaced with a modern equivalent 132kV circuit switch device.

At the new Sallachy 132/33kV substation a 132kV transformer circuit switcher will be installed.

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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. 

Virtual Consultation

We are holding virtual consultation exhibitions to provide information on our preferred route to the local community and interested parties. The virtual consultation event is designed to be as interactive as face to face events, allowing for the presentation of key project information and plans, as well as proving an opportunity to ask questions about the project. Visitors will be able to engage directly with the project team, via the live text chat function, where they can ask any questions they might have about the project and share their feedback on the current proposals. The virtual consultation events will be taking place on Tuesday 15 December 2020 between 2-4pm and 6-7.30pm.

Sallachy Wind Farm Connection December 2020 Virtual Consultation A4 Booklet

Related Projects: Sallachy Wind Farm Connection

File Type: pdf
Published: 15 Dec 2020
Sallachy 132kV OHL Consultation Document

Related Projects: Sallachy Wind Farm Connection

File Type: pdf
Published: 20 Nov 2020
Sallachy 132kV OHL Consultation Document

Related Projects: Sallachy Wind Farm Connection

File Type: pdf
Published: 19 Oct 2021

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