The Pathed Non-Threaded (PNT) Scheduling Model

  1. In this video, we're going to explain the Path Non-Threaded or PNT scheduling model.
  2. What is PNT?
  3. Path non-thread is a scheduling that allows shippers to nominate a transportation path for their gas from receipt to delivery.
  4. Southern Star uses this path and associated shipper-defined rankings to schedule gas on the pipe accordingly.
  5. southern star previously used the non path scheduling.
  6. shippers nominated receipts and deliveries as a total.
  7. Southern Star then used a pro rata method to schedule gas on the pipe.
  8. Priority of service is the first scheduling priority in both models.
  9. However, the differences between shipper-defined rankings versus transportation provider pro-rata designation.
  10. Also, P&T model gives shippers flexibility and control through the use of path nominations and rankings.
  11. There were challenges posed by the non-PATH scheduling model.
  12. Specific markets and supply were not directly tied together, which made it difficult for Southern Star to follow contractual rights through constraints.
  13. The use of the PATH nonthreaded model allows us to more easily follow not only contractal rights, through constraint areas,
  14. but it allows the shipper to proactively protect their nominations by utilizing ranks.
  15. Non-path scheduling models was also inconsistent with the industry.
  16. With most of the industry's pipelines using the path non-threaded model, existing and new shippers on Southern Star system will be more familiar with this model.
  17. On the non path scheduling model confirmations were made at a specific shipper and contract level.
  18. This dictated to the shippor which contracts would be scheduled for flow.
  19. P&T confirmation are made in an aggregate shiper level without the need to detail specific contracts.
  20. This allows Southern Star to use shipperset rankings to schedule the gas.
  21. This slide gives an example of a non-passed model nomination and a PNT model domination.
  22. Assuming that a shipper's contract has a 10,000 maximum daily quantity with two receipt locations scheduled at 5,00 each for a total of 10 thousand,
  23. and three different delivery locations on the same contract scheduled for $10,000. In the event of a curtailment or a cut,
  24. say, maybe receipt location A's $5,00 gets cut to zero, the contract would need to be balanced.
  25. Without rankings or an identified path tying the receipts to the deliveries, that $5000 cut would have been pro rata along all three delivery This may
  26. not have been the intent of the shipper.
  27. To more accurately gather the intents of shippers, the P&T model gives a demonstration of same contract of 10,000 decotherms,
  28. same receipt locations and delivery location quantities, but in addition to the receipt and the delivery nominations, a PATH nomination is now provided
  29. that has specific receipt location to specific delivery locations and gives the shipper the opportunity to rank those.
  30. So in the event of a cut on either the upstream or the downstream side, it is clear to Southern Star the intent of the shipers and we can easily make the
  31. appropriate cuts.
  32. Instructions on how to place specific transaction type nominations can be found under scheduling resources in a CSI resource library.

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