ENTSOG Tariff NC - Implementation Document 2nd Edition

ASSUMPTIONS:

\\ The TSO is connected to other systems and TSOs, and the system border is in red. \\ Some pipelines are bidirectional (in yellow), others are unidirectional (in blue). Some IPs allow bidirectional flow (such as I), others only allow unidirectional flow (such as Q, which only allows entry). \\ LNG regasification terminals are connected to the TSO network. It is not possi- ble to flow gas to an LNG regasification terminal. \\ Production points (e. g. ‘E’) are connected to the TSO network. It is not possible to flow gas to a production point. \\ Flowing gas from a storage point to another storage point is theoretically possi- ble (e. g. for arbitrage reasons). \\ Distances calculated here ( in km , but there is no mandatory unit in Article 8) are based on pipeline routes. For the exercise, the straight line between points was used, explaining why distances often display square roots  1) . For clarity, some distances are indicated in the right-hand side of the picture. \\ A short description of each point of this TSO: – – Point A: a storage point connected to the TSO bidirectional network, near consumption points, – – Point B: an IP allowing bidirectional flows, connected to the TSO bidirection- al network, near consumption and production points, – – Point C: a storage point purely for cross-system use, fed by production, not connected to the domestic bidirectional network (no flows from/to it), – – Point D: a production point connected to the TSO bidirectional network, near consumption points and an IP, – – Point E: a production point connected to the TSO bidirectional network, near a consumption point and a storage for cross-border use, – – Point F: an LNG point connected via a unidirectional pipeline to the TSO bidirectional network and to an IP allowing bidirectional flows, – – Point G: a production point connected to the TSO bidirectional network and near consumption points, – – Point H: a consumption point connected to the TSO bidirectional network, near a production point, – – Point I: an IP allowing bidirectional flows, connected to the TSO bidirection- al network, near a consumption point and an LNG point, – – Point J: an IP only allowing entry flows, located near a consumption point, indirectly connected to the TSO bidirectional network, – – Point K: an IP allowing bidirectional flows, connected to the TSO bidirectional network, near a storage point and a consumption point, – – Point L: an LNG point connected via a unidirectional pipeline to the TSO bidirectional network, – – Point M: an IP allowing bidirectional flows, connected to the TSO bidirectional network and near a consumption point, – – Point N: a consumption point connected to the TSO bidirectional network, near storage, production and other consumption points,

 1) In line with Article 8, distances follow the pipeline approach (airline is not allowed). There is no mandatory distance unit (it could be ‘km’ or ‘mile’…) but we chose the standard ‘km’. The map displays points with integer coordinates, for sim- plicity. Distances between points are calculated using the straight line. To calculate such distances, the Pythagorean Theorem is therefore used, where the straight line is the hypotenuse of a triangle where the entry and exit points consid- ered are at each end of the hypotenuse. This explains why the length of the straight line often appears as a square root.

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TAR NC Implementation Document – Second Edition September 2017