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WDBA

It is impossible to estimate in advance. We look 10 minutes and 15 minutes past the hour to the end of hour prediction of the SBS. If the prediction of the SBS at 10 minutes past the  hour gives a reason to a WDBA, then an announcement is made in Gasport and a Request For Quote (RFQ) is placed on the trading screen of the ICE Endex. The announcement and the RFQ is an estimate of the volume and product placed on the within-day market of ICE Endex and is based on the latest information.

If the prediction of the SBS at 15 minutes past the hour still gives a reason to a WDBA, then an update of the announcement is made and again a Request For Quote (RFQ) is placed on the trading screen of ICE Endex.

If the prediction of the SBS for the next hour at 20 minutes past the hour gives a reason for a WBDA than an order is placed on the within-day market of ICE Endex.

The type of product for which the order is placed, is dependent on the color of the zone wherein the SBS is predicted. In the light green zone GTS send an order for a WD product to the exchange with a lead time of 3 hours and 40 minutes with supplies for the remaining hours of the gas day. As an indication, an order that leads to a transaction at 12:20 will be delivered from 16:00 to 06:00. In the orange and red zone GTS send an order for a Next-Hour product with a lead time of 40 minutes. The whole delivery takes place in one clock hour. An order for a Next Hour product that leads to a transaction at 12:20 has a delivery from 13:00 to 14:00.

The volume that must be called will be calculated as follows:

  • Difference between the anticipated final value of the SBS and the boundary value of the dark green zone.
  • The part that possibly is not yet delivered of a realized WDBA transaction is included in the determination of the volume of any new WDBA. This only applies for WDBA with the SBS in the light green area.
  • If the SBS is in the light-green zone, and the imbalance is less than the unbalance of the previous hour, no WDBA will take place.

The message that will be constructed has the following format:

GTS WDM Order Forecast at: <xx:05>/<xx:10> LET - GTS <buys>/<sells>

Product: <single hour>/<remainder of day>

Amount per hour: <value> MW/h

Total amount: <value> MWh

SBS forecast value: <+/-value> MWh