Network codes implementation

FAQ

Has GTS implemented the provisions of the daily imbalance charge calculation methodology (BAL NC art. 20)?

Yes, although you do not receive an invoice for the daily imbalance charge, we have.Article 21(2) of BAL NC states that the daily imbalance quantity calculation shall be adapted accordingly where a linepack flexibility service is offered; GTS offers such a service (and where you do get an invoice for) in such a way that the outcome of the calculation for the daily imbalance quantity is always zero. As that is the case, the daily imbalance charge is consequently also always zero. Obviously we will not send you an invoice for that.

Because we understand that it is still important to maintain an incentive on the network users to be in balance at the end of the gas day, we implemented a Linepack Flexibility Service, for which you do receive an invoice every month.

Do you calculate a daily imbalance quantity for each network user’s balancing portfolio for each gas day according to art. 21?

Yes, we do, and as explained in [the question before]  we know it is zero.

Have you implemented the neutrality provisions acc. to art. 29-31?

On 22 May 2020 ACM decided on an amendment to the Transport code gas LNB with regard to the implementation of the neutrality charge. This charge settles costs and revenues from balancing activities, including the linepack flexibility service, settlements following from emergencies and costs resulting from shipper defaults. Up until 2021, these costs and revenues were not invoiced separately, but were included in the transport tariff. The method to establish the charge is now regulated through the Transport code.

Have you implemented the information provision (art. 32 to 42) by 1 October 2016?

Yes, although we do not publish the end-of-day forecast of the amount of gas in the transmission system at the end of the gas day. As GTS implemented information model variant 1 this information would not be of any value to the network users. Network users know their near-real-time position, and the near-real-time position of the System Balance Signal (SBS), and this is enough to be able to mitigate their risk for balancing actions. If we would publish this forecast then our best guess would be that the SBS at the end of the gas day would have the same value as the value at the start of the gas day. We can state this, because network users have to deliver a day-ahead-programme to GTS that is volume neutral for the gas day, and prudent network users will have to do their utmost to act according to this programme.