There are 3 Marketplace Transaction Types supported for tagged Interchange Transactions. They are 1) Fixed, 2) Dispatchable and 3) Up-to-TUC. Each is discussed below.
NOTE: If the Market Transaction type is not explicitly defined in the e-Tag, the transaction defaults to Fixed.
6.5.1 Fixed Interchange Transactions
Fixed Interchange Transactions are physical transactions that bring Energy into and/or out of the SPP BAA. Energy prices are settled at the LMP at the applicable External Interface
Settlement Location. Submitters of this type of transaction in the Integrated Marketplace are price takers for that Energy.
Fixed Interchange Schedules are supported in both the Day-Ahead Market and in the Real- Time Balancing Market.
REFERENCE: Market Protocols section 4.2.2.7
An e-Tag for a Real-Time Fixed Interchange Schedule must be submitted no later than 20 minutes prior to the start of the schedule. Fixed Interchange Schedules may not be submitted or modified during the operating hour except for reliability purposes as determined by the Transmission Provider. The MP must ensure the transaction meets the applicable
acknowledgement and transfer deadlines.
Real Time Fixed Schedule Market Information – choices in Yellow
SPP Market Information on an e-Tag
Market Date Market Type Transaction Type
9/27/2013 Real Time Fixed
Day Ahead Dispatchable
Up-to-TUC
Bid/Offer MWS are specified in Tag Energy Profile
A Day-Ahead Fixed Interchange Schedule must be submitted via e-Tag and approved by the MP and in the implemented state by 1100 hours CPT (OD-1). Day-Ahead Fixed Interchange
Schedules automatically roll into the Real-Time Energy and Operating Reserve Market as a Fixed Interchange Schedule.
Day-Ahead Fixed Schedule Market Information – choices in Yellow
SPP Market Information on an e-Tag
Market Date Market Type Transaction Type
9/27/2013 Real Time Fixed
Day Ahead Dispatchable
Up-to-TUC
Bid/Offer MWS are specified in Tag Energy Profile
Southwest Power Pool, Inc. Tagging Interchange Transactions If the submitter does not want the cleared Day-Ahead Fixed Interchange Schedule to roll into the Real-Time Balancing Market, the MP must zero out the e-Tag no later than 30 minutes prior to the start of the schedule or the start of the operating hour. The MP is settled at the Day-Ahead Location Marginal Price (LMP) for the cleared MW amount and charged for any deviation in the Real-Time Balancing Market at real-time LMPs.
NOTE: All Fixed Interchange Schedules’ Energy prices are settled at the LMP at the applicable External Interface Settlement Location.
6.5.2 Dispatchable Interchange Schedules
Dispatchable Interchange Schedules are physical transactions that bring Energy into and/or out of the SPP BAA and specify a Bid or Offer (MWh). These schedules are supported in the Day-Ahead Market only and also must meet all market requirements. LMPs are determined in the Day-Ahead Market at the appropriate External Interface Settlement Location representing the interface between the SPP BA and the applicable External BA.
A Dispatchable Offer specifies both a MW amount and a minimum price that the customer must pay if the transaction clears the Day-Ahead Market. See the example below for input to the Tag Market info section.
REFERENCE: SPP Market Protocols section 4.2.2.7 (3) (b) Import Interchange Transaction Offers
The following business rules apply to Dispatchable Interchange Schedules:
• Dispatchable Interchange Schedules must adhere to the Day-Ahead Market timing
deadlines.
• If the Dispatchable Interchange Schedule is cleared in the Day-Ahead Market, it rolls into the Real-Time Balancing Market and is treated as a Fixed Interchange Schedule at the MW level that was determined in the Day-Ahead Market.
• All Dispatchable Interchange Schedules, both Import Schedules and Export Schedules,
are settled at LMPs determined in the Day-Ahead Market at the appropriate External Interface Settlement Location representing the interface between the SPP BA and the applicable external BA.
• Dispatchable Interchange Schedules cannot be used for Through Interchange Schedules.
• MPs may use the Market Import Service (MIS) product for Dispatchable Normal
Interchange Schedules that are imports.
• Dispatchable pricing Offers can be a minimum of $-1000 and a maximum of $1000.
Southwest Power Pool, Inc. Tagging Interchange Transactions Day-Ahead Dispatchable Schedule Market Information – choices in Yellow
SPP Market Information on an e-Tag
Market Date Market Type Transaction Type
9/27/2013 Real Time Fixed
Ahead Day Dispatchable
Up-to-TUC
HE01 HE07 $25 HE07 $20 HE07
HE02 HE08 $20 HE08 $25 HE08
HE03 HE09 $25 HE09 $25 HE09
HE04 HE10 $25 HE10 $30 HE10
HE05 HE11 $20 HE11 HE11
HE06 HE12 $20 HE12 HE12
6.5.3 Up-to-TUC Interchange Schedules
Up-to-TUC Interchange Schedules are physical transactions created via e-Tag that specify a willingness to pay the Transmission Usage Charge (TUC) (in $/MWh) represented by a
maximum amount beyond which the MP agrees to be curtailed. These schedules are relevant to the DA Energy and Operating Reserve Market only.
An Up-to-TUC Offer on an Interchange Transaction specifies both a MW amount and the maximum amount of congestion cost and marginal loss cost the customer is willing to pay if the transaction is cleared in the Day-Ahead Market. See example below for input to the Tag Market Info Section.
REFERENCE: SPP Market Protocols section 4.2.2.7 (3) (c) Import Interchange Transaction Offer
The following business rules apply to Up-to-TUC Interchange Schedules:
• Up-to-TUC Interchange Schedules are supported in the Day-Ahead Market only and the
cleared amount determined by the Day-Ahead Market is rolled into the Real-Time Balancing Market.
• The transaction must meet all e-Tag and market requirements. An Up-to-TUC
Southwest Power Pool, Inc. Tagging Interchange Transactions Day-Ahead Up-to-TUC Schedule Market Information – choices in Yellow
SPP Market Information on an e-Tag
Market Date Market Type Transaction Type
9/27/2013 Real Time Fixed
Ahead Day Dispatchable
Up-to-TUC
HE01 $ 25 HE07 HE07 HE07
HE02 $ 25 HE08 HE08 HE08
HE03 $ 25 HE09 HE09 HE09
HE04 $ 25 HE10 HE10 HE10
HE05 $ 25 HE11 HE11 HE11
HE06 $ 25 HE12 HE12 HE12
The TUC is calculated based on the differences in LMPs between the Source points and Sink points.