NationalgridESO – Electricity Ten Year Statement (ETYS)

The Electricity Ten Year Statement (ETYS) is published annually as part of the role of the electricity system operator. It’s part of the annual electricity transmission planning cycle, and shows the likely future transmission requirements of bulk power transfer capability of the National Electricity Transmission System (NETS). This is based on the Future Energy Scenarios (FES), which help capture a wide range of future network requirements.

The ETYS is all about understanding what the requirements will be for the National Electricity Transmission System to transfer bulk power over the next decade – where future growing needs might occur – so that as the Electricity System Operator, they can plan ahead to manage the network effectively and securely. The ETYS includes contributions from the GB transmission owners.

This year’s ETYS shows how they are improving the network development analysis and tools as part of the commitments in the ESO Forward plan. It presents latest developments to two pathfinder projects, i.e., the regional voltage analysis and the year round thermal analysis. These findings highlight the importance of studying the future network requirements in conditions other than the winter peak.

The ETYS aims to encourage and inform debate, leading to changes that ensure a secure, sustainable, and affordable energy future.