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