Baltic CCR (Capacity Calculation Region)
A Capacity Calculation Region is a set of bidding-zone borders on which TSOs perform coordinated cross-zonal capacity calculation, established under Article 15 of CACM Regulation (EU) 2015/1222. The Baltic CCR covers the EE–LV, LV–LT, EE–FI (EstLink), LT–SE4 (NordBalt) and LT–PL (LitPol) borders. Capacity calculation uses the coordinated NTC method; operational coordination runs through the Baltic Regional Coordination Centre in Tallinn.
A Capacity Calculation Region (CCR) is a set of bidding-zone borders on which TSOs perform coordinated cross-zonal capacity calculation. CCRs are established under Article 15 of CACM Regulation (EU) 2015/1222 by ACER decision; the original list of ten CCRs was adopted by ACER Decision 06/2016. The Baltic CCR groups the borders of the three Baltic bidding zones.
Borders covered
The Baltic CCR covers EE–LV (Elering / AST), LV–LT (AST / Litgrid), EE–FI on EstLink (Elering / Fingrid), LT–SE4 on NordBalt (Litgrid / Svenska kraftnät) and LT–PL on LitPol Link (Litgrid / PSE). Some borders also matter to neighbouring CCRs for cross-CCR coordination — EE–FI to Hansa, LT–SE4 to Nordic, LT–PL to Core.
Methodology
Capacity calculation in the Baltic CCR uses coordinated NTC for both day-ahead and intraday timeframes, with the Transmission Reliability Margin capped at 30% of TTC. The latest Baltic DA/ID Capacity Calculation Methodology was approved on 21 November 2024. The TSOs argued that flow-based — used in Core and Nordic CCRs — adds no value in a radially connected system without parallel paths.
Coordination
Operational coordination is handled by the Baltic Regional Coordination Centre (Baltic RCC), a Tallinn-based joint venture of Elering, AST and Litgrid established under the Clean Energy Package and operational since 2022. Baltic RCC performs day-ahead capacity calculation, security analyses and outage coordination on behalf of the three TSOs.
Sources
CACM Article 15 · ENTSO-E: Capacity Calculation Regions · Baltic DA/ID CCM (21 Nov 2024)
Biežāk uzdotie jautājumi
- What is a Capacity Calculation Region (CCR)?
- A CCR is a set of bidding-zone borders on which TSOs perform coordinated cross-zonal capacity calculation, established under Article 15 of CACM Regulation (EU) 2015/1222. The CCR runs the calculation algorithm that determines how much power can flow safely between zones in each market timeframe — input to the day-ahead, intraday and balancing market platforms.
- Which borders are in the Baltic CCR?
- EE–LV (Estonia–Latvia), LV–LT (Latvia–Lithuania), EE–FI on EstLink (Estonia–Finland), LT–SE4 on NordBalt (Lithuania–Sweden) and LT–PL on LitPol (Lithuania–Poland). The Baltic CCR sits between the Nordic CCR (FI, SE, NO, DK), the Hansa CCR (PL, DE) and the now-disconnected Russian system.
- What method does Baltic CCR use?
- Coordinated NTC (cNTC). Each TSO computes a Net Transfer Capacity for its borders; the regional coordinator harmonises across borders to ensure consistency. The flow-based method, preferred for highly meshed grids in continental Europe, is not yet used in the Baltic CCR — the network topology is closer to a string than a mesh, so cNTC remains adequate.
- Where does CCR coordination run from?
- The Baltic Regional Coordination Centre, established in Tallinn under the SOGL (Reg (EU) 2017/1485) and Regulation (EU) 2019/943 Article 35, hosts the operational coordination function for the Baltic CCR. It is jointly governed by Elering, AST and Litgrid.