Section 4

The process of merging the individual grid models established in accordance with Article 27 of Regulation (EU) 2015/1222 shall apply when merging the individual grid models into a common grid model for each long-term time frame. No later than six months after the approval of the generation and load data provision methodology for long-term time frames referred to in Article 17 and the common grid model methodology for long-term time frames referred to in Article 18, all TSOs in each capacity calculation region shall jointly develop operational rules for long-term capacity calculation time frames supplementing the rules defined for the operation to merge the individual grid models pursuant to Article 27 of Regulation (EU) 2015/1222. The coordinated capacity calculators established in Article 27 of Regulation (EU) 2015/1222 shall calculate long-term cross-zonal capacities for their capacity calculation region. For this purpose, no later than six months after the approval of the capacity calculation methodology for long-term time frames referred to in Article 10, all TSOs in each capacity calculation region shall jointly develop operational rules for long-term capacity calculation time frames supplementing the rules defined for the operation of the coordinated capacity calculators pursuant to Article 27 of Regulation (EU) 2015/1222. The relevant requirements set in Article 27 of Regulation (EU) 2015/1222 shall apply for long-term capacity calculation time frames. The process and requirements set in Article 28 of Regulation (EU) 2015/1222 for creating a common grid model shall apply when creating the common grid model for long-term capacity calculation time frames in capacity calculation regions, where security analysis based on multiple scenarios pursuant to Article 10 is applied. Where TSOs apply the statistical approach pursuant to Article 10, the process for the calculation of long-term cross-zonal capacity shall include at least: a selection of historical day-ahead or intraday cross-zonal capacity data sets from a single period or a set of periods and order the data into a duration curve; a calculation of capacity corresponding to the risk level for the selected data set; a calculation of long-term cross-zonal capacity to be offered to forward capacity allocation taking into account a margin to reflect the difference between historical cross-zonal capacity values and forecasted long-term cross-zonal capacity values; common rules to take into account available information about planned outages, new infrastructure and generation and load pattern for the long-term capacity calculation time frames. Where TSOs apply the security analysis based on multiple scenarios pursuant to Article 10, the requirements set in Article 29 of Regulation (EU) 2015/1222, except Article 29(4) where relevant, shall apply to long-term capacity calculation time frames in capacity calculation regions. Each coordinated capacity calculator shall split the calculated long-term cross-zonal capacity for each forward capacity allocation by applying the methodology for splitting cross-zonal capacity pursuant to Article 16. Each coordinated capacity calculator shall submit the calculated long-term cross-zonal capacity and the splitting of long-term cross-zonal capacity for validation to each TSO within the relevant capacity calculation region pursuant to Article 24. Each TSO shall validate the results of the calculation for long-term cross-zonal capacity on its bidding zone borders or critical network elements for each long-term capacity calculation time frame pursuant to Article 15. Each TSO shall validate the results of the calculation for splitting of long-term cross-zonal capacity on its bidding zone borders or critical network elements pursuant to Article 16. Each TSO shall send its capacity validation and validated splitting of this capacity for each forward capacity allocation to the relevant coordinated capacity calculators and to the other TSOs of the relevant capacity calculation regions. Validated splitting of long-term cross-zonal capacity shall be provided by each coordinated capacity calculator for the execution of forward capacity allocation pursuant to Article 29. TSOs shall, upon request, provide to their regulatory authorities a report detailing how the value of long-term cross-zonal capacity for a specific long-term capacity calculation time frame has been obtained. TSOs shall coordinate curtailments of already allocated long-term cross-zonal capacity, if the curtailments concern a time frame of more than 48 hours ahead of the start of the delivery day. In case of curtailment of long-term transmission rights, including nominations in respect of such rights, within 48 hours ahead of the start of the delivery day, TSOs in each capacity calculation region shall apply the day-ahead and intraday capacity calculation process as referred in Article 29 of Regulation (EU) 2015/1222. If a TSO needs to curtail already allocated long-term cross-zonal capacity, it shall send a request to the responsible coordinated capacity calculator to launch the coordinated calculation of necessary curtailments of long-term cross-zonal capacity for the capacity calculation region. The TSO shall support its request with all relevant information. The coordinated capacity calculator shall provide the updated cross-zonal capacity to the relevant TSOs for validation. Each TSO shall validate the updated cross-zonal capacity on its bidding zone borders or critical network elements pursuant to Article 24. The coordinated capacity calculator shall provide the validated updated cross-zonal capacity to the relevant TSOs and single allocation platform to perform curtailment pursuant to Article 53.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-04 · Text as adopted (Official Journal); later amendments are not incorporated in this text.