Prisma

GTS offers and sells available capacity via Prisma, the joint capacity booking platform of the major European transmission system operators in accordance with the requirements of the European Network Code on Capacity Allocation Mechanisms (NC CAM).

The CAM NC prescribes five standard capacity products to be offered by the European TSO’s at the cross border interconnection points. These products are:

  • Yearly capacity (gas years)
  • Quarterly capacity
  • Monthly capacity
  • Daily Day Ahead (DA) capacity
  • Daily Within Day (WD) capacity

These capacity products are auctioned in accordance with a predefined auction calendar published by ENTSOG. Each auction is preceded by the publication of the capacities offered by the TSO’s. Both data for all of our auction products can be found on the website of  PRISMA.

For each product type the PRISMA platform will on the basis of the amount of capacity offered by each TSO, determine how much capacity will be offered as bundled and/or unbundled capacity. Firm capacities on both sides of the border are bundled to a maximum level. Remaining capacity that can not be bundled is offered as unbundled capacity. Unbundled capacity is offered in a separate auction that runs in parallel with the auction for the bundled capacity.

Within-day capacity is offered every day (including weekends and business holidays) and  consists of the remaining firm forward and firm backhaul capacity from the day-ahead auctions on the PRISMA platform.

The first within-day bidding round opens at 19.00h (LET). This bidding round is open for 7,5 hours until 2.30h (LET). The following bidding rounds open at the start of every hour and are open for 30 minutes. The capacity of a successful bid can be used 3,5 hours after closure of the bidding round.

The tariff for within-day capacity is based on the daily capacity tariff and a within-day factor. This factor is determined on the number of hours the capacity is made available for: within-day factor = number of hours/24.

Interruptible capacity, transfers of capacity and Surrender of Capacity (SoC) in combination with the within-day product is not supported.

An overview of all interconnection points where capacity is auctioned via PRISMA An overview of all interconnection points where capacity is auctioned via PRISMA

More details about the auction process can be found in the CAM network code as published by Entsog.

View all frequently asked questions

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  • The daily capacity tariff can be calculated as follows: daily factor * monthly factor * yearly tariff

    • Daily factor is always 1/30
    • Monthly factor:
      * In case of FORWARD FLOW depends on month:
      - 0,3 for December, January, February (winter months)
      - 0,15 for march, April, October, November (shoulder months)
      - 0,075 for May, June, July, August, September (summer months)
      * In case of BACKHAUL
         - Monthly factor is 1/12 for all months
    • Yearly tariff can be found on our website

    The costs for a daily FIRM capacity booking can be calculated as: 
    cost (€/day) =  booked daily capacity (kWh/h) * daily tariff (€/kWh/h/Day)

    If the booking is INTERRUPTIBLE, then a discount of 30% will be applied: 
    cost (€/day) =  0,7 * booked daily capacity (kWh/h) * daily tariff (€/kWh/h/Day)

  • The monthly tariff can be calculated as: monthly tariff = monthly factor * yearly tariff

    • Monthly factor:
      * in case of FORWARD FLOW depends on month:
         - 0,3 for December, January, February (winter months)
         - 0,15 for March, April, October, November (shoulder months)
         - 0,075 for May, June, July, August, September (summer months)

      * in case of BACKHAUL
         - Monthly factor is 1/12 for all months
    • Yearly tariff can be found on our website

    The costs for a monthly FIRM capacity booking can be calculated as:
    cost (€/month) =  booked daily capacity (kWh/h) * monthly tariff (€/kWh/h/month)

    No Interruptible products.

  • The quarterly tariff can be calculated as: quarterly tariff = quarterly factor * yearly tariff

    • Quarterly factor:
      * in case of FORWARD FLOW depends on the quarter of a gasyear (Oct – Oct):
         - 0,6 for Q1 (October, November, December)
         - 0,75 for Q2 (January, February, March)
         - 0,3 for Q3 (April, May, June)
         - 0,225 for Q4 (July, August, September)
      * No BACKHAUL product
    • Yearly tariffs can be found in TSC Appendix 1a en 1b

    The costs for a quarterly FIRM capacity booking can be calculated as:
    cost (€/quarter) =  booked quarterly capacity (kWh/h) * quarterly tariff (€/kWh/h/quarter)

    No Interruptible products.

  • The costs for a yearly FIRM capacity booking can be calculated as:
    cost (€/year) =  booked yearly capacity (kWh/h) * yearly tariff (€/kWh/h/year)

    No Interruptible and/or backhaul products.

  • The Within Day capacity can be calculated as follows: the Daily capacity tariff times the Within Day factor.

    The Within Day factor is determined on the number of hours the capacity is made available(runtime): number of hours/24.