NOTICE DATE: November 13, 2023
NOTICE TYPE: W-A111323-01 Operations
SHORT DESCRIPTION: Implementation of maximum shadow price for an irresolvable constraint in SCED
INTENDED AUDIENCE: ERCOT Market Participants
DAY AFFECTED: November 13, 2023
LONG DESCRIPTION: On November 13, 2023, ERCOT is implementing a modified maximum shadow price for a constraint that was found to be irresolvable on November 12, 2023, per the criteria defined in Section 3.6.1 of the business practice document, “Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints.” The update to the maximum shadow price will occur between 3:00 PM and 4:00PM and be effective starting November 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 (set in accordance with Section 3.6.2 of that same document) are as follows:
| Contingency Name |
Constraint Name |
From Station/kV |
Description |
Maximum Shadow Price |
| SMCEABS8 |
CAPELL_MERK1_1 |
MERK/69 |
Loss of the 138 kV line from MOORE to MCELMURRAY LIN 1 overloading the 69 kV line from MERK to CAPELLA. |
2,000 $/MWh |
This new maximum shadow price will be used for all constraints in SCED sharing the same monitored element (i.e. constraint name) and direction.
ADDITIONAL INFORMATION: The business practice document is posted under Key Documents on the Real-Time Market webpage at http://www.ercot.com/mktinfo/rtm/.
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 [log in to unmask].
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