On February 28th, GRTgaz hosted a webinar regarding the consolidated maintenance schedule for the summer of 2019 and the new transfers between GRTgaz and Teréga.

Changes to the maintenance schedule include revisions to the CPRTt in order to provide more accurate probabilities on available capacities; and two superpoints* with planned restrictions (SPNS1U – formerly SP0004, and SSPNS3D).


Three points will be impacted by the superpoints in 2019: PITS Atlantique (SSPNS3D), PIR Virtualys and Obergailbach (both SPNS1U). The restrictions can be visualised on the Trans@ctions portal, as well as on Smart GRTgaz.

GRTgaz also supplies a superpoint simulator to allow for a better view on your restrictions next summer. This simulator in Excel form can be found on GRTgaz’ website.

The management of GRTgaz and Teréga common superpoints (the focus lies on NS2 downstream and NS3 downstream in the presentation) is arranged according to three steps:
1. The TSOs split the superpoint available capacity between the 2 sub-superpoints (this step is transparent for the shipper).
2. The shipper nominates a transfer quantity from one sub-superpoint to the other (this step is an action for the shipper, but only if he wishes to have the full superpoint flexibility).
3. The TSOs calculate the confirmations on their points, with a mutualised UIOLI between both TSOs (this step is transparent for the shipper).

More flexibility

Superpoints allow you more flexibility in the event of restrictions. They are used in two cases:
• For maintenance, in the event of works on the GRTgaz core network.
• To manage the network’s residual limits, in the event of a mutualised restriction.

The aim is to pool restrictions on groups of points called superpoints, allowing you
to optimise your nominations and your favourite point.