ESB Networks has successfully deployed a new batch of Dynamic Line Rating (DLR) sensors on sections of the 220 kV transmission network in north Dublin, using autonomous drone technology to carry out the installations safely on live power lines.
This project marks several firsts for ESB Networks. It is the first time DLR sensors have been installed at 220 kV on the network, and the first-time autonomous drones have been used to install equipment on energised transmission infrastructure. The approach meant the work could be completed without taking outages, in one of the country’s most critical and heavily utilised parts of the electricity network.
Dynamic Line Rating technology provides real-time information on the temperature of overhead power lines. As electricity flows through a line, it warms up, and this temperature determines how much power the line can safely carry. By monitoring this continuously, system operators can better understand how much spare capacity is available and safely increase power flows when conditions allow.
ESB Networks worked closely with Ireland’s transmission system operator, EirGrid, to deliver the project. Both organisations have used Dynamic Line Rating technology for several years, and this deployment represents a further expansion of its use to support the efficient operation of the transmission system, particularly in areas experiencing growing demand.
The use of drone based installation brought additional benefits. It removed the need for technicians to climb transmission towers, reduced safety risks, and allowed all work to be completed on live infrastructure. This enabled the installations to be delivered quickly and safely, with no interruption to electricity supply.
Supporting Accelerated Capacity delivery
The deployment forms part of ESB Networks’ Accelerated Capacity Programme, which focuses on unlocking additional capacity on the existing electricity network through targeted solutions. The programme is designed to enable new connections for homes, businesses, and renewable generation by making maximum use of existing infrastructure where possible.
By providing greater real-time visibility of how transmission lines are performing, Dynamic Line Rating supports the programme’s objectives by helping to safely increase capacity on constrained parts of the network without the immediate need for new infrastructure.
Planning for the future electricity system
The additional sensors will help EirGrid operate the transmission network more dynamically, particularly during periods of high demand or increased renewable generation. By making better use of existing assets, the technology supports a more flexible and resilient electricity system.
As Ireland continues its transition to a low carbon energy future, electricity demand is expected to continue to grow. ESB Networks remains committed to delivering innovative solutions and strategic investment to ensure the network continues to provide a safe, secure, and reliable electricity supply for customers across the country.
Watch a video highlighting the drone based installation process here