Shaping Our Electricity Future

This document outlines the EirGrid and SONI strategy for the implementation of GFM capabilities in Ireland and Northern Ireland. The strategy provides a pathway for the integration of advanced control capabilities within PPMs and HVDC systems, enabling the provision of essential system services to ensure the stability and resilience of the All-Island power system at higher levels of renewable penetration.

This paper sets out the TSOs' recommendations to the SEMC for the aspects of the daily auction design which have not previously been subject to industry consultation, namely the DASSA Parameters and Scalars. This paper reflects the feedback received on the DASSA Parameters and Scalars Consultation Paper through stakeholders’ written responses and input to the industry workshop, and also summarises that feedback and provides the TSOs’ commentary in response.

This report, prepared by the TSOs’ partner AFRY, provides additional commentary addressing some of the concerns raised by industry throughout the DASSA Parameters and Scalars consultation, and, in some cases, updates the original recommendations to the TSOs or offers alternative options. This report should be read in conjunction with the TSOs' DASSA Parameters and Scalars Recommendations Paper.

​Please find the minutes recorded at the System Services Code Working Group sessions in November 2025. The TSOs will publish further minutes and slides of the sessions as they continue to progress.