Core Region Completes Flow-Based Intraday Capacity Calculation Rollout with IDCC(e) Go-Live

PSE confirmed the successful go-live of the Core Flow-Based Intraday Capacity Calculation process IDCC(e) on 14 October 2026, the fifth and final process in the IDCC(a)-(e) sequence for the Core capacity calculation region. The first operational day covered intraday capacity for the operational day 14 October 2026.

IDCC(e) closes out the full sequential rollout of flow-based intraday capacity calculation processes in the Core region, meaning cross-zonal intraday capacities for the full day (including the final 18:00-24:00 window) are now calculated using flow-based methodology and fed directly into continuous cross-border intraday trading via SIDC, rather than legacy coordinated net transmission capacity (NTC) based methods.

This event operationalizes the final tranche of Core's multi-year transition from NTC-based to flow-based intraday capacity calculation. IDCC(e) specifically supplies capacities to SIDC by 16:00 for the 18:00-24:00 operational-day hours, flowing directly into continuous trading. With all five IDCC(a)-(e) processes now live, the Core region's intraday cross-zonal capacity allocation is fully harmonized on flow-based logic across the entire operational day, which should improve capacity utilization accuracy and reduce the capacity under-allocation historically associated with simplified NTC approaches, particularly in the late-day hours that were previously the last to transition. Market participants trading continuously on SIDC in Core bidding zones should see capacity values that better reflect real-time network constraints during evening hours, though realized liquidity and price effects will depend on subsequent operational performance data not yet available from this go-live announcement alone.

EU Capacity Allocation and Congestion Management (CACM) Regulation (EU) 2015/1222 - flow-based intraday capacity calculation methodology for the Core CCR

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