NOTICE DATE:  March 26, 2020

NOTICE TYPE:  M-A032620-01 Operations

SHORT DESCRIPTION:  Re-evaluation of maximum Shadow Price for an irresolvable constraint in SCED

INTENDED AUDIENCE:  ERCOT Market Participants

DAY AFFECTED:  March 26, 2020

LONG DESCRIPTION:  On March 26, 2020, ERCOT re-evaluated the maximum Shadow Price for an irresolvable constraint that had accumulated a net margin larger than $95,000/MW, per the criteria defined in in Section 3.6.2 of the Other Binding Document (OBD), Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints. 

The maximum shadow price for the following contingency/constraint pair was re-determined in accordance with Section 3.6.2 of that same document and will remain as $2,000 per MWh:

Contingency Name	Constraint Name	From Station/kV	Description	Maximum Shadow Price
SECNMO28	6100__G	ACSSW/138	Loss of Moss Switch to Yukon Switch 138 kV line overloads the 138 kV line from Andrews County South to Amoco Three Bar Tap	2,000 $/MWh

 

This 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, Setting the Shadow Price Caps and Power Balance Penalties in Security Constrained Economic Dispatch, is posted in the Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints link under Key Documents on the Real-Time Market webpage of the ERCOT website.

CONTACT: If you have any questions, please contact your ERCOT Account Manager or these resources:
ERCOT Client Services – (512) 248-3900 or ClientServices@ercot.com
ERCOT HelpDesk – (512) 248-6800 or (866) 870-8124 or HelpDesk@ercot.com

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