NOTICE DATE: January 23, 2025
NOTICE TYPE: W-A012325-01 Operations
SHORT DESCRIPTION: Implementation of maximum Shadow Price Cap for an irresolvable constraint in SCED
INTENDED AUDIENCE: ERCOT Market Participants
DAY AFFECTED: January 23, 2025
LONG DESCRIPTION: On January 23, 2025, ERCOT is implementing a modified maximum Shadow Price Cap for a constraint that was found to be irresolvable on January 22, 2025, in accordance with the requirements established in subsection 3.6 of ERCOT Nodal Protocol Section 22 Attachment P: Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints. The update to the maximum Shadow Price Cap will occur between 3:00 PM and 4:00 PM today and be effective starting January 23, 2025. The updated maximum Shadow Price Cap will remain in effect until otherwise notified through a Market Notice. The contingency/constraint pair and updated maximum Shadow Price Cap are as follows:
|
Contingency Name
|
Constraint Name
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From Station/kV
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Description
|
Maximum Shadow Price Cap
|
|
SMVRLA_8
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STEWAR_VERTRE1_1
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STEWART/138
|
Loss of the 138 kV line from MVRANGER to LA_PALMA overloading the 138 kV line from STEWART to VERTREES
|
$2,000/MWh
|
This new maximum Shadow Price Cap will be used for all constraints in Security-Constrained Economic Dispatch (SCED) sharing the same monitored element (i.e., constraint name) and direction.
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