NOTICE DATE:  January 30, 2017

NOTICE TYPE:  W-A013017-01 Operations

SHORT DESCRIPTION: Implementation of maximum Shadow Price for an irresolvable constraint in SCED

INTENDED AUDIENCE: ERCOT Market Participants

DAY AFFECTED:  January 30, 2017

LONG DESCRIPTION: ERCOT is implementing a modified maximum Shadow Price for a constraint that was found to be irresolvable per the criteria defined in Section 3.6.1 of the ERCOT Business Practice document, “Setting the Shadow Price Caps and Power Balance Penalties in Security Constrained Economic Dispatch.” The contingency/constraint pair and maximum Shadow Price (set in accordance with Section 3.6.2 of that same document) are as follows:

Contingency Name	Constraint Name	Description	Maximum Shadow Price
SWCSBOO8	BARL_FTSW1_1	Loss of the 138 kV line from Fort Stockton Plant to Barilla and Solstice overloading the 138 kV line from Barilla to Fort Stockton Switch	$2,000.00

ADDITIONAL INFORMATION:  The ERCOT Business Practice, Setting the Shadow Price Caps and Power Balance Penalties in Security Constrained Economic Dispatch, is posted under Key Documents in the Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints link on the Real-Time Market webpage of 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 [log in to unmask].

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