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- Approximate Run Time: 1 Hour
- To display this tutorial as a full screen presentation, press the “Slide
Show” button on the lower right of the screen.
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- Introduction to Segmentation
- Firm Transport Scheduling Priorities
- Calculating and Viewing Scheduling Priorities
- Allocation of Entitlements among Nominations
- Batch Validation Processes
- Bumping Rules
- Pipeline and Meter Operator Cuts
- Effect of Increasing or Decreasing Nominated Volumes
- To jump directly to a topic, click on it at this time. Otherwise, click the left mouse button
to go to the next topic.
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- Since scheduling priorities vary by pipeline, please click on the
Pipeline you wish to review:
- TET LP
- AGT
- M&N US
- To jump directly to a topic, click on it at this time. Otherwise, click the left mouse button
to go to the next topic.
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- TE has four scheduling priorities for firm transport:
- In Path Nominations:
- Priority 1: Firm Receipt Point to Firm Delivery Point
- Priority 2: Secondary Receipt Point to Firm Delivery Point
- Priority 3: Any Nomination that Delivers to a Secondary Delivery Point
- Out of Path Nominations:
- Priority 4: Transportation contract has flow point entitlements in the
zone, but the nomination is outside the path of the contract’s flow
entitlements.
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- Priority 1: Firm Receipt Point to
Firm Delivery Point which is in path
- When a shipper has contractual rights to receive gas from a point, or
rights to have gas delivered to a point, then these are defined as firm
points. Looking at it from the
pipeline’s standpoint, the pipeline’s obligation to receive gas from a
specific point is called the MDRO, or maximum daily receipt
obligation. The pipeline’s
obligation to deliver gas to a specific point is called the MDDO, or
maximum daily delivery obligation.
- When (1) gas is being moved from a firm receipt point to a firm delivery
point, (2) the quantity of gas being moved is within the MDROs and MDDOs
of the points being used, and (3) the nomination to move the gas is
within the contract’s path, then that nomination receives a scheduling
priority of 1, the highest priority available.
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- Priority 2: Secondary Receipt Point to Firm Delivery Point which is in
path
- When a nomination exceeds the firm entitlements assigned to a receipt
point (i.e. the receipt exceeds the MDRO of that point), the excess is
classified as a secondary receipt.
If a receipt point never had any firm entitlements assigned to
it, then any receipts from that point are classified as secondary.
- Receipts from a TABS pool are always secondary receipts, since TABS
pools are not firm receipt points.
- When a nomination (1) receives gas from a secondary point, (2) delivers
to a firm delivery point, and (3) is within the contract’s path, then
that nomination receives a priority 2.
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- Priority 2: Restriction on a Secondary Receipt Point to Firm Delivery
Point
- Normally, gas being moved from a secondary receipt point (such as a TABS
pool) to a firm delivery point is ranked as a priority 2. However, if there is a restriction in
a zone which is downstream of the receipt zone, the priority will be
increased to a priority 1.
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- Priority 3: Delivery to a Secondary Point which is in path
- When a shipper delivers gas to a secondary point and the nomination is
within path, that nomination is classified as a priority 3 (regardless
of whether the receipt point was firm or secondary).
- For example, for a nomination which is in path, if the shipper does have
firm rights to the delivery point (i.e. the shipper has MDDO at a
delivery point), but those rights have been exceeded, the excess will be
classified as a secondary delivery, scheduled at a priority 3.
- In addition, for a nomination which is in path, if the shipper does not
have any firm rights to the delivery point (i.e. no MDDO), then all the
gas delivered to that point will be classified as a secondary delivery,
scheduled at a priority 3.
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- Priority 4: Transport Out-of-Path
- A nomination is out-of-path when segment entitlements do not exist for
any segment in the nomination’s path, or where existing segment
entitlements have been exceeded at any point in the path of the
nomination.
- Note that the “firmness” of the receipt or delivery points does not
matter. If the contract on which
the shipper is nominating does not have a “firm path” from receipt to
delivery point, that nomination is out- of-path, and it is assigned a
priority 4.
- Also, any nomination which runs contrary the flow of the underlying
contact is out-of-path. For
example, a backhaul nomination on a forward-haul contract is
out-of-path, and will be assigned a priority 4.
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- Impact of Restrictions on Out of Path Nominations – Priority 4A and 4B
- If a restriction causes a cut to a nomination which is out-of-path, the
priority 4 nomination is further classified into priorities 4A and 4B.
- If the restriction is in that portion of the nomination where the
shipper has contract path entitlements, then the priority of the
nomination is a 4A.
- If the restriction is in that portion of the nomination which is
out-of-path, the nomination priority is 4B.
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- Impact of Restrictions on Out of Path Nominations – Priority 4A and 4B
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- Click on the following button to go to the next section, discussing how
to view the priorities assigned to scheduled gas:
- Click anywhere except on the above button to go to the next topic in
this section, which will discuss firm scheduling priorities for AGT.
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- In Path Nominations:
- Priority 1: Firm Receipt Point to Firm Delivery Point
- Priority 2: Receipt or Delivery Point is Secondary
- Out of Path Nominations:
- Priority 3: Transport is Out of Path
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- Priority 1: Firm Receipt Point to
Firm Delivery Point which is in path
- When a shipper has contractual rights to receive gas from a point, or
rights to have gas delivered to a point, then these are defined as firm
points. Looking at it from the
pipeline’s standpoint, the pipeline’s obligation to receive gas from a
specific point is called the MDRO, or maximum daily receipt
obligation. The pipeline’s
obligation to deliver gas to a specific point is called the MDDO, or
maximum daily delivery obligation.
- When (1) gas is being moved from a firm receipt point to a firm delivery
point, (2) the quantity of gas being moved is within the MDROs and MDDOs
of the points being used, and (3) the nomination to move the gas is
within the contract’s path, then that nomination receives a scheduling
priority of 1, the highest priority available.
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- Priority 2: Receipt or delivery point is Secondary, In Path
- A point which does not have any contractual receipt or delivery
entitlements (i.e. no MDRO or MDDO at that point) is classified as a
secondary point. In addition,
when firm entitlements at a receipt or delivery point are used up (that
is, when the MDRO or MDDO of the points are exceeded), any further flow
through that point is classified as secondary.
- When one of the points in a nomination is secondary, then the nomination
is a priority 2. When a portion
of the nomination exceeds any of the point’s firm entitlement’s rights
(that is, when receipts exceed MDRO or deliveries exceed MDDO), then
that portion of the gas flow which exceeds firm entitlements is
secondary, and that portion is scheduled at a priority 2.
- This assumes that the nomination is in-path – i.e. there are sufficient
segment flow entitlements between receipt and delivery points for the
quantity of gas transported.
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- Priority 3: Transport Out-of-Path
- A nomination is out-of-path when segment entitlements do not exist for
any segment in the nomination’s path, or where existing segment
entitlements have been exceeded at any point in the path of the
nomination.
- Note that the “firmness” of the receipt or delivery points does not
matter. If the contract on which
the shipper is nominating does not have a “firm path” from receipt to
delivery point, that nomination is out- of-path, and it is assigned a
priority 3.
- Also, any nomination which runs contrary the flow of the underlying
contact is out-of-path. For
example, a backhaul on a forward-haul contract is out-of-path, and will
be assigned a priority 3.
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- Click on the following button to go to the next section, discussing how
to view the priorities assigned to scheduled gas:
- Click anywhere except on the above button to go to the next topic in
this section, which will discuss firm scheduling priorities for M&N
US.
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- In Path:
- Priority 1: Firm Receipt Point to Firm Delivery Point
- Priority 2a: One point is secondary.
- Priority 2b: Both points are secondary.
- Out of Path:
- Priority 3a: One point is firm.
- Priority 3b: One point is secondary within path.
- Priority 3c: Both points are secondary, out of path.
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- Priority 1: Firm point receipt to firm delivery point
- When a shipper has contractual rights to receive gas from a point, or
rights to have gas delivered to a point, then these are defined as firm
points. The contractual right to
receive gas from a specific point into the pipeline is called the MDRO,
or maximum daily receipt obligation.
The contractual right to have gas delivered from the pipeline to
a specific point is called the MDDO, or maximum daily delivery
obligation.
- When (1) gas is being moved from a firm receipt point to a firm delivery
point, (2) the quantity of gas being moved is within the MDROs and MDDOs
of the points being used, and (3) there are sufficient segment
entitlements at each segment along the nomination’s path, then the
nomination receives a scheduling priority of 1, the highest priority
available.
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- Priority 2a: Between a Firm and a Secondary Point within transportation
path
- A point which is used as a receipt or delivery point which does not have
any firm contractual entitlements (i.e. no MDRO or MDDO at that point)
is classified as a secondary point.
In addition, when firm entitlements of a receipt or delivery
point are used up (that is, when the MDRO or MDDO of the points are
exceeded), any further flow through these points are classified as
secondary.
- When only one of the points in the nomination is secondary, then the
nomination is a priority 2a. When
a portion of the nomination exceeds the point’s firm entitlement rights
(that is, when receipts exceed MDRO or deliveries exceed MDDO), then
that portion of the gas flow which exceeds firm entitlements is
secondary, and that portion is scheduled at a priority 2a.
- Note that this assumes that the nomination is in-path – i.e. there are
sufficient segment flow entitlements between receipt and delivery
points.
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- Priority 2b: Between Two Secondary Points within transportation path
- When both points in the nomination are secondary, then the nomination is
a priority 2b. When a portion of
the nomination exceeds the point’s firm entitlement’s rights for both
the receipt and delivery points (that is, when receipts exceed MDRO and
deliveries exceed MDDO), then that portion of the gas flow which exceeds
firm entitlements at both receipt and delivery points is a priority 2b.
- This assumes that the nomination is in-path – i.e. there are sufficient
segment flow entitlements between receipt and delivery points.
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- Priority 3a: Primary Receipt to
Out-of-path Delivery, or Out-of-path Receipt to Primary Delivery
- When gas is moving between a primary point and a secondary point which
is out-of-path, then the priority
of that nomination is 3a. For
example, gas moving from a primary receipt point to a secondary delivery
point which is out-of-path will be a priority 3a. Also, gas moving from a secondary
receipt point which is out-of-path to a primary delivery point will also
be a priority 3a.
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- Priority 3b: Secondary In-Path
Receipt to out-of-path Delivery, or Out-of-path Receipt to Secondary
Delivery
- When gas is moving between a secondary point which is in-path and a
secondary point which is out-of-path,
then the priority of that nomination is 3b. For example, gas moving from a
secondary receipt point which is in-path to a secondary delivery point
which is out-of-path will be a priority 3b. Also, gas moving from a secondary
receipt point which is out-of-path to a secondary delivery point which
is in-path will be a priority 3b.
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- Priority 3c: Out-of-path Receipt
to out-of-path Delivery
- When gas is moving between a secondary receipt point which is out-of
path to a secondary delivery point which is out-of-path, then the
priority of that nomination is 3c.
- In addition, any time segment entitlements between a receipt and
delivery point are missing, or those entitlements have been used up,
then the priority of that nomination will be a 3c. This is true regardless of the status
of the receipt and delivery points.
For example, if a nomination moves gas from a firm receipt point
to a firm delivery point, but there are insufficient segment
entitlements between the two points, then the priority of that
nomination will be a 3c.
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- Flow entitlements will be allocated to nominations based on two
factors: First, delivery ranking;
and second, time of nomination entry. If two or more activities have the
same delivery ranking, then time of entry for these activities will be
used to allocate entitlements.
Time of entry will be determined by the last, or latest volume
entered in an activity’s receipt of delivery quantity field.
- If activities are not ranked, the default delivery ranking of 999 will
apply to all activities, and flow entitlements will be allocated solely
on the time a volume was entered in an activity’s receipt or delivery
quantity field.
- Flow entitlements allocated to each activity will then be used to
determine each activity’s scheduling priority.
- The following slides illustrate these principles.
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- Two sets of batch processes will run on a preset schedule every
day. They are:
- 1. Timely Batch Process
- 2. Hourly Batch Processes
- While either of these batch processes are running, nominations which are
being validated and scheduled will not be available for update. They can be viewed, but if a shipper
tries to update one of these "locked" nominations by pressing
the submit key from the nomination or confirmation screen, a message
will display stating that the nomination is being used by another
process.
- The following screens provide more detail about the nature and timing of
these processes.
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- The first major category of batch processes is the timely batch
process. This process takes
timely nominations, incorporates a wide array of information affecting
pipeline capacity (such as demand, restrictions, and so forth), and
determines which nominations can be satisfied for the next full gas day.
- As the name implies, the scheduling of the timely batch process is
driven by the timely deadline of 11:30 AM. At approximately 12:05 PM every day,
the timely batch process will begin, and examine timely nominations so
that the pipeline can be scheduled for the next gas day.
- The timely batch process should take about 40 minutes, but that can vary
depending on pipeline conditions.
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- The second category of batch processes will be the hourly validation
processes. These processes will
run at the top of the hour, every hour.
These batch processes will perform several essential functions,
such as:
- Validate MDQ of all activities under all related releasing and
replacement contracts
- Apply confirming party and scheduling cuts
- Schedule nominations
- Assign scheduling priorities
- Pull in late and intraday nominations
- Validate nominations which should match (such as Storage nominations and
Zone balance transfers)
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- 5 minutes before the execution of the hourly validation processes, a
warning message will display to inform users of the upcoming run.
- The hourly validation processes will validate all late and intraday
nominations. Like the daily
process, when the hourly batch validation processes are running, late
and intraday nominations will not be available for update.
- In order to allow for the completion of the timely batch process, the
hourly processes will not begin picking up late nominations for the next
gas day until 2PM.
- Finally, note that intraday nominations cannot be entered during the
last hour of the gas day (i.e. after 8 AM for the gas day ending at 9
AM).
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- First, there are the cuts made by the timely and hourly batch validation
processes. These cuts will be based on scheduling priority, nomination
delivery ranking, and time of entry.
- Second, there are operator cuts, or cuts by meter confirming
parties. These will be
automatically processed based on nomination rankings only.
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- Meter confirming parties can only reduce gas volumes - they cannot
increase them.
- If a meter confirming party cuts the volume of scheduled gas, the only
way to reinstate the original volume is to have the shipper re-nominate.
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- If a nomination is reduced after the timely deadline, it will retain its
original time of entry (i.e. the time the last quantity was typed into
either the receipt or delivery quantity fields). For example, if the original
nomination was entered as a timely nomination, the reduced volume will
also be treated as a timely nom.
- However, if a nomination is increased, the time of entry assigned to the
nomination will be updated. If
the nomination is changed after the timely deadline, that portion of the
nomination which represents an increase will be considered a late
nomination, and be scheduled accordingly. The original portion of the nomination
will retain its original time of entry.
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- Introduction to Segmentation
- Firm Transport Scheduling Priorities
- Calculating and Viewing Scheduling Priorities
- Allocation of Entitlements among Nominations
- Batch Validation Processes
- Bumping Rules
- Pipeline and Meter Operator Cuts
- Effect of Increasing or Decreasing Nominated Volumes
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Notes
