The project has centred around replacing old infrastructure at Beauly Substation, some of which has been in operation since the 1960s. 

The upgraded assets will work to boost network security, the resilience and flexibility of the transmission network, and aid the growth of renewable energy generation across the north of Scotland. 

A key part of this progress is the transition to a new 132kV gas-insulated switchgear (GIS) housed within a newly constructed building on the site. 

The first section of the new facility has now been energised. 

Three transformers dating back to 1970 have also been replaced, with the first now connected to the new system. 

With each one weighing more than 140 tonnes, they regulate power flow across the network, serving as components in the substation.   

Local contractors played a key position in the project, with Beauly-based Global Infrastructure helping with the delivery of some of the civil works for the project. 

Matthew McKessick, project manager at SSEN Transmission, said: “The successful energisation of the new 132kV components at Beauly is a major achievement for everyone involved in the project and represents a significant milestone in the modernisation of this important part of our transmission network. 

“This investment will provide increased operational flexibility and network resilience, while creating the capacity needed to connect more renewable energy to the grid and support Scotland’s clean energy ambitions.”

As the project advances, work will continue at the site through its remaining phases, such as the transfer of current circuits and the decommissioning of the 132kV infrastructure.