ENTSOG TYNDP 2017 - Main Report

Data collection for projects is a long and very important process for ENTSOG as it is a fundamental prerequisite to the modelling and simulations. The input data is the basis for the network assessment and data is collected early in the process of TYNDP. For TYNDP 2017, the data collection process ended in May 2016 and, as a result, all the data used to run the simulations, including projects data, are timestamped on May 2016. Some project details will have been updated after May 2016, and in some occasions reflected in relevant NDPs. Such updates are not included in the Final TYNDP 2017, to ensure consistency between the project information used to perform the TYNDP assessment, and the project information published, both timestamped on May 2016. In this context, NRAs input on recent project information represents valuable additional information for stakeholders. NRA comments on the TYNDP 2017 projects have been transmitted to the project promoters for their review. Some promoters have provided responses. This does not mean that promoters that have not reacted do not have own views on NRA comments. The feedback provided by the promoters who responded has been mostly in line with NRAs comments. Promoters have confirmed the incorrect data identified by NRAs, and confirmed recent progress of projects since May 2016 (such as new commissioning years). Some promoters have provided specific clarifi- cations on NRAs comments. In a few occasions promoters disagree with NRA comments, in particular on NRA objections against the inclusion of projects in the TYNDP. As for the NRAs comments, the promoters’ feedback referred to above is not included in the final version of TYNDP. ACER Opinion pointed to the fact that the N-1 for ESW-CBA indicator as defined in the CBA Methodology, and used in the TYNDP assessment, should be clearly differentiated from the N-1 indicator from Regulation (EU) No. 994/2010. As detailed in the Assessment chapter, the N-1 for ESW-CBA indicator derives from Regulation (EU) No. 994/2010 on Security of Supply, but shows some differences with the N-1 indicator calculated by Competent Authorities. Indeed, it is computed over the whole TYNDP time horizon and is established based on the capacities used in the TYNDP: for interconnection points where the reported capacities are not the same on both sides of the border, the calculation is done with the lower capacity (lesser-of-rule). Additionally, it is calculated considering nominal withdrawal capac- ities for storages, whereas the actual withdrawal capacities depend on the inventory level. Interconnectors that are located in one given country but cannot contribute to the demand of the country are not included in the N-1 indicator calculation for this country. In line with ACER recommendation, the “N-1” indicator referring to the Energy System Wide CBA is designated in the final TYNDP 2017 and throughout the report by the term “N-1 for ESW-CBA” to avoid any confusion.

F.2.2.4 Assessment chapter: N-1 in TYNDP: differentiate from Regulation (EU) No. 994/2010

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Ten-Year Network Development Plan 2017 Main Report