NOTICE DATE: July 13, 2023
NOTICE TYPE: W-A071323-01 Operations
SHORT DESCRIPTION: Implementation of maximum Shadow Price for an irresolvable constraint in SCED
INTENDED AUDIENCE: ERCOT Market Participants
DAY AFFECTED: July 12, 2023
LONG DESCRIPTION: On July 13, 2023, ERCOT will be implementing a modified maximum Shadow Price for a constraint that was found to be irresolvable on July 12, 2023 per the criteria defined in Section 3.6.1 of the Other Binding Document (OBD), Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints. The update to the maximum Shadow Price will be implemented between 5:00 PM and 6:00 PM Central Prevailing Time (CPT) on July 13, 2023, and be effective starting July 13, 2023. The updated maximum Shadow Price will remain in effect until otherwise notified through a Market Notice. The contingency/constraint pair and updated maximum Shadow Price are as follows:
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Contingency Name
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Constraint Name
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From Station/kV
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Description
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Maximum Shadow Price
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SDIMBEV8
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HAMILT_MAVERI1_1
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HAMILTON/138
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Loss of the Dimmit (DIMMIT) to Bevo (BEVO) 138kV line overloads the 138 kV line from Hamilton Road (HAMILTON) to Maverick (MAVERICK)
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3,500 $/MWh
|
This new maximum Shadow Price will be used for all constraints in Security-Constrained Economic Dispatch (SCED) which share the same monitored element (i.e., constraint name) and direction.
ADDITIONAL INFORMATION: The ERCOT business practice document, Setting the Shadow Price Caps and Power Balance Penalties in Security Constrained Economic Dispatch, can be found in the Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints under Key Documents on the Real-Time Market webpage, and under the Other Binding Documents List, both of which are on the ERCOT website.
CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at ClientServices@ercot.com.
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