SSEN Transmission is leading the way in the UK’s clean energy transition by operating the country’s largest Dynamic Line Rating (DLR) network, covering over 300 km of overhead transmission lines in its north of Beauly project. Full operation is planned by the end of 2025.

DLR technology enhances electricity transmission by using real-time environmental data—such as temperature, wind speed, and solar radiation—to calculate the true capacity of power lines dynamically. Unlike traditional static line ratings, which are fixed and often conservative, DLR allows the grid to safely carry higher power loads when conditions permit, particularly during windy periods.

Sensors installed along the lines send live conductor temperature data to cloud-based algorithms. These compute real-time and forecast line capacities, which are then shared with the National Energy System Operator (NESO) to optimize grid balancing and reduce constraints.

Brant Wilson, Innovation Portfolio Manager at SSEN Transmission, highlighted the project’s significance: “Operating the UK’s largest dynamic line rating network is a major milestone… By making smarter use of the grid, we’re enabling more renewable electricity to flow and alleviating constraints on the network.”

The DLR system complements existing network reinforcements, maximizing grid efficiency and helping reduce costs for energy consumers. SSEN and NESO will conduct calibration and communication testing before full deployment, with plans to expand DLR coverage further in the region.

Source: ssen-transmission.co.uk