Project Type: Transmission reinforcement
Location: Perth & Kinross

Contact Details

Jenna Black
Title: Community Liaison Manager
Telephone: 01738 453 287
Mobile: 07342 027 725
Address: Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ
Status: Operational

Rannoch substation has delivered locally-generated hydro electricity to residents in the north of Scotland since the 1930s. Almost 90 years on, we have extended the substation to facilitate new hydro generation connections and improve the security of supply for the area.

The upgrade consisted of several key elements:

• Establishment of a site compound and welfare facilities for project staff
• Construction of an aggregate platform and concrete bases to support electrical infrastructure
• Minor changes to existing terminal tower
• Construction of a new control building to house electrical switchgear
• Implementation of screening plans and realignment of an access track
• Construction of one wood pole span from existing terminal tower
• Delivery of two new grid transformers and two new primary transformers
• Dismantling and removal of existing substation equipment

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.

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. 

How and to what extent are electricity consumers' interests considered?

We 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.

Final transformer delivery to Rannoch substation

Scottish and Southern Electricity Networks are due to have the final transformer delivery to Rannoch substation on Monday 25th September 2017 arriving at approximately 12 noon *. A heavy load route has been agreed with Transport Scotland and is as follows; the transformer will be in transit by road network from Skelmersdale, England. The load will exit the A9 at 9.00am* under police and private escort onto A872 towards Aberfeldy continuing 5.5km. The transformer will then turn right and continue for 10.1km and then continue on the B846 for a further 46km to Rannoch substation site entrance. The transformer will be under police and private escort from the A872 and will be constantly in transit. The delivery team will work to ensure that there are no unnecessary delays during this period. *Please note, times are subject to change should unforeseen circumstances arise.

Rannoch substation now energised

Rannoch substation has been successfully energised following a major refurbishment programme.
View article...

Transformer energisation

We have successfully energised the first grid transformer at Rannoch substation. The second transformer is due to be energised at the end of August

Sign up for project updates

Keep informed with all that's happening on this project