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Mott Macdonald appointed on Channel Tunnel HVDC project

Channel tunnel 3to2

Mott MacDonald has been appointed to provide engineering support to install an electricity connector in the Channel Tunnel.

The 1GW, 51km high voltage direct current (HVDC) interconnector will allow the exchange of electricity between the UK and France, which will allow management of peaks and troughs in demand as energy surplus from the UK could be exported to Europe.

The consultancy firm will provide engineering support to ElecLink “ranging from civil to specialised HVDC electrical” in the design and construction phases.

The HVDC interconnector will allow a predicted saving of 6.1tonnes of CO2 emissions up to 2030.

Mott MacDonald project manager Stuart Wilson said: “This commission builds on our long history of helping clients deliver first-of-a-kind engineering projects in challenging infrastructure environments.

“On this scheme, our power engineers worked with rail safety, risk management and specialist environmental colleagues to provide a single integrated source of engineering expertise to create a viable and safe system running through the rail tunnel.”

The engineering consultancy has worked with ElecLink since the beginning of the project in 2012 to provide technical, commercial, and senior management advice and created technical specifications for the interconnector.

Mott MacDonald’s practice leader for HVDC David Cross said: “Mott MacDonald has a large, growing HVDC function containing staff with vast experience in the computer modelling, design, installation and commissioning of power electronic HVDC systems.

“Our HVDC experts, as well as colleagues from other disciplines, have supported the ElecLink team as it grew in size with engineering, geotechnical and risk management staff.”

Mott Macdonald said there will be a “negligible impact on the environment” due to on-site screening in the design stage, and optimising the structure of the Channel Tunnel means there will be no disruption to marine life.

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