The project aims to address thermal limitations of underground distributions networks, particularly in HV/LV networks, by incorporating real-time temperature data to challenge existing cable rating methodologies. Existing cable ratings are based on assumed environmental factors, leading to potential over- or underestimation of network true capacity. The DIRT project will first conduct a feasibility study to explore temperature monitoring technologies, follow on value streams will then develop monitoring technologies through real-world  trials to validate environmental assumptions  and refine rating methodology. The goal is to optimize network capacity, thus reduce the need for costly replacement, utilising existing assets. whilst facilitating the installation of low-carbon technologies essential for achieving NetZero. The project will help identify thermal vulnerabilities within networks, informing future decisions that will improve the resilience and reliability of networks for customers whilst enhancing understanding of climate change thermal impacts. Success will be measured by the development of refined cable rating methodology and the demonstrated cost savings from more efficient network planning and asset utilisation.

Benefits

The insights gained from DIRT will provide valuable benefits to both UK DNOs and their customers.
By investigating the potential of real-time thermal data, DIRT will challenge traditional cable rating and asset replacement methods. Updating UK DNO cable rating practices with real-time thermal data could reveal untapped network capacity, reducing the need for expensive network upgrades and making better use of existing networks, ultimately delivering greater value to customers.
Expanding network capacity will facilitate the installation of low-carbon technologies essential for achieving NetZero targets. The project will also enhance understanding of climate change impacts and contribute to the UK’s climate change adaptation efforts, which will be increasingly important in the coming years.
The project will help identify thermal vulnerabilities within networks, informing future decisions that will improve the resilience and reliability of networks for customers. Better network reliability will reduce unplanned outages and minimize the costs of repairs and the broader societal impacts.
The initial feasibility study will be research-focused, with financial benefits to be determined only after this phase.