ACER amends the methodology for electricity intraday flow-based capacity calculation in the Core region
ACER amends the methodology for electricity intraday flow-based capacity calculation in the Core region
What is it about?
In April 2023, the regulatory authorities of the Core capacity calculation region referred to ACER two proposals from the Transmission System Operators (TSOs) to amend the Core region’s Intraday Capacity Calculation Methodology (Core ID CCM).
After extensive discussions with Core TSOs and regulatory authorities, and having consulted with stakeholders in summer 2023, ACER has decided to approve the proposals, with some amendments.
The Core region comprises 13 Member States: Austria, Belgium, Czech Republic, Croatia, France, Germany, Hungary, Luxembourg, the Netherlands, Poland, Romania, Slovakia and Slovenia.
What's new?
Since June 2022, the intraday capacity calculation methodology in the Core region has been based on a flow-based approach, which is aligned with the day-ahead flow-based market coupling. This approach helps determine how much electricity can be sent across borders based on the current network conditions, aiming for a more efficient grid use.
The TSOs have proposed two amendments with the following objectives:
- Ensure the methodology aligns with the parallel Regional Operational Security Coordination (ROSC) process, as the intraday capacity calculation will use the ROSC outputs (such as common grid models and selected remedial actions).
- On top of the flow-based validation (performed for each critical network element), introduce the Available Transfer Capacity (ATC) validation step as a transitional solution. ATC helps verifying the amount of electricity that can be safely traded across borders. This temporary validation step will give Core TSOs additional time to further develop the flow-based validation.
By approving these amendments, ACER will facilitate the first implementation of intraday flow-based capacity calculation in Europe. This will enhance the efficiency of the intraday electricity market in the Core region and its further alignment with the congestion management process.
What are the next steps?
The first intraday flow-based capacity calculations are to be implemented by early July 2024.
Access the updated methodology.