Transmission

These study files are to be read in conjunction with the 2024 All-Island Ten-Year Transmission Statement: https://cms.eirgrid.ie/sites/default/files/publications/All-Island-Ten-…

The All-Island Ten Year Transmission Forecast Statement 2024 was prepared in accordance with the statutory and licence obligations with Ireland and Northern Ireland. The document provides: - Network models and data for the all-island transmission system, - Forecast generation capacity and demand growth, - Maximum and minimum fault levels at transmission system stations, - Predicted transmission system power flow at different points in time, and - Demand and generation opportunities on the transmission system.

The following slides are intended to give an overview of our ongoing TOP25 performance, focusing on the following: Outages that have been completed to date; Why outages have been deferred/cancelled; Any additional work that has been included; Plan for remainder of TOP25

The proposed Transmission Loss Adjustment Factors (TLAFs) which have been calculated by the TSOs, based on the approved TLAF methodology (SEM-12-049), for 2025/26 (1 October 2025 to 30 September 2026).