Confirmation of Core Flow-Based Intraday Capacity Calculation (e) go-live for business day 14 October 2026
Core project parties are pleased to confirm 14 October 2026 as the go-live date of IDCC(e) for trades on business day 14 October 2026. The external parallel run has demonstrated the stability of the process. Core project parties deem the results representative; thus, no significant impact is expected from the remaining deployment of individual validation tools. Core project parties will continue to closely monitor the remaining period until go-live. Final operational communication on the go-live preparation of IDCC(e) and its completion can be expected on 14 October 2026.
The IDCC(e) process delivers updated cross-zonal capacities by around 16:00 to the Single Intraday Coupling (SIDC) market platform for MTU’s 18:00 – 24:00. Having a harmonized capacity calculation methodology in place in the Core CCR makes the European electricity system more efficient and robust. This harmonization thereby improves the capacity allocation in the Core CCR and enables the European power grid to transport more electricity across borders leading to lower overall cost. Furthermore, it allows for an improved cooperation between all involved parties. Finally, market participants will also benefit from further improved transparency of all capacity related data.
This milestone is the final step in the implementation of the sequence of flow-based intraday capacity (re)calculations in the region and a big step towards the optimisation of the available capacity for the intraday market while respecting operational security using the latest available CGM (common grid model).
Further information regarding the performance and stability of the external IDCC(e) //- run is provided in the attached presentation.
Communication channels
Market participants who would like to follow the Core project developments are invited to join the Core Consultative Group (CCG) by signing up to the Core CG distribution list [link]. The participants of the Core Consultative Group will receive regular information, and invitations to teleconferences and meetings.
Next to the Core CG, a Question & Answer Forum for the Core FB capacity calculation project is currently in use. The Forum can be accessed via https://coreforum.my-ems.net/.
The Core TSOs invite all market participants to use this Forum for their queries.
About the Intraday Capacity Calculation project in the Core CCR
The Core Flow-Based Intraday Capacity Calculation (Core FB IDCC) project promotes the development and implementation of a flow-based intraday capacity calculation across the whole Core Capacity Calculation Region (Core CCR) in the framework of the SIDC. The Core CCR consists of the bidding zone borders between the following EU Member States’ bidding zones: Austria, Belgium, Croatia, the Czech Republic, France, Germany, Hungary, Ireland, North–Ireland, Luxemburg, the Netherlands, Poland, Romania, Slovakia and Slovenia.
Market integration - Core to energy transition
The energy transition towards a carbon free electricity supply is a European challenge that requires the use of the European electricity system to the full extent. Weather-dependent supply and increasing demand response will lead to a different and more intense use of the grid. The Core market integration project is aiming to create operational preconditions to optimise the use of the system from a regional perspective and make the single European market a reality.