Supergrid transformers, collectively weighing over 1,300 tonnes, have been delivered to substations across National Grid’s electricity transmission network in the first half of 2024. These deliveries are part of ongoing infrastructure upgrades aimed at enhancing connectivity and resilience.

Strengthening Networks with Precision Logisticss

In May, a 174-tonne supergrid transformer (SGT) arrived at Bridgwater substation in Somerset after a journey that involved sailing up the River Parrett and navigating through Bridgwater town. This transformer is integral to the Hinkley Connection Project, which aims to boost the substation’s voltage from 275kV to 400kV. Shortly thereafter, another SGT of similar size was transported from Tilbury Docks to a new grid supply point (GSP) substation in Suffolk. The journey spanned 10 hours during the night, ensuring minimal disruption as part of the Bramford to Twinstead Reinforcement project.

Navigating Urban Challenges for Future Readiness

In another feat of logistics, an SGT passed through Tilbury Docks and navigated the M25 to reach Willesden substation in West London. This delivery supports the Willesden and Kensal Green Connection project, crucial for reinforcing the network ahead of connecting a new data center. Looking ahead, two giant SGTs are scheduled for delivery to Elstree substation in Hertfordshire in June. These deliveries are part of National Grid’s efforts to ensure reliable electricity supplies amidst increasing demand.

Impact and Significance of Supergrid Transformers

Supergrid transformers play a vital role in enhancing substations’ capacity and resilience, facilitating efficient electricity transmission from generators and safe distribution to homes and businesses across regional networks. These transformers, each weighing as much as 30 African elephants and comparable in size to double-decker buses, require meticulous logistical planning and coordination with local authorities, often with police escorts. Specialized firms such as Allelys, Collett, and Mammoet are instrumental in executing these complex operations.

Expert Insight: Ensuring Seamless Delivery

Roisin Quinn, Director of Asset Operations at National Grid, highlighted the collaborative effort behind these deliveries:

“A lot of work goes into transformer deliveries, long before any electrons pass through them. Multiple teams across National Grid and its supply chain are involved in moving and installing these huge devices in a way that minimizes disruption."

“These recent and upcoming SGT deliveries are all contributing to significant upgrades we have underway on our transmission network, and will all reinforce the grid as electricity demand grows and projects connect in the future.”

Over the past five years, National Grid has installed and energized over 20 supergrid transformers, enhancing its network to accommodate various generation and demand initiatives, including wind farms, rail electrification projects, and distribution network connections.

Source: nationalgrid.com