Rehabilitation and Repair

SSE begins power generation with first Tummel Bridge Power Station turbine

SSE begins power generation with first Tummel Bridge Power Station turbine
(photo courtesy SSE Renewables)

The Tummel Bridge Power Station in Perthshire is generating renewable electricity once again after the installation and energization of the first of two new hydropower turbine-generator units.

This marks a major milestone in SSE Renewables’ £50 million (US$63.6 million) investment to repower the hydro station that will increase the station’s capacity from 34 MW to 40 MW during optimum conditions.

The project involves replacing the station’s two original “camel back” twin-runner, horizontal Francis turbines, which were installed in 1933, with new modern runner technology that will extend the power station’s working life by at least 40 years. The new units will significantly improve efficiency and enable a higher output by extracting the maximum energy from the available water.

The project team will continue to focus on the second turbine, which is installed and undergoing dry commissioning tests, according to a release. The turbine is expected to be energized and operational by mid-summer 2024.

“This is one of the largest investments we’ve made to our existing hydro fleet in recent times. This project demonstrates our ongoing commitment to invest in hydro power,” said Neil Lannen, director of hydro asset management at SSE Renewables.

“Hydro power has a vital role to play in our path to achieving net zero carbon emissions in the UK by 2050 and this investment will ensure Tummel Bridge continues to play a crucial role in Scotland’s energy mix for generations to come. The project is a perfect example of extending the working life of a station which has successfully generated clean, green energy for around 90 years.”

Delivery of the repowering program has also supported Scotland’s regional supply chain, helping sustain and create local jobs in the Highlands throughout the duration of the works.

Inverness-headquartered Global Infrastructure has operated as principal contractor for the duration of the project, establishing and controlling the site; coordinating and managing the safety and work packages of all contracting staff and visitors; and delivering enabling works including site establishment, superstructure bracing work and general site readiness. Global also managed dismantling of the original 90-year-old equipment, complete civil works to remove original foundations within the powerhouse down to bedrock and reinstatement of a new foundation for the plant.

Stantec led on civil design as well as supporting the engineering team. Voith led on the mechanical and electrical elements of the project.