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From: ERCOT Client Services
Sent: Monday, April 09, 2018 2:04 PM
To: [log in to unmask] <[log in to unmask]>
Cc: ERCOT Account Managers <[log in to unmask]>; Market Notices <[log in to unmask]>
Subject: W-B040918-01 Implementation of maximum shadow price for a consistently irresolvable constraint in SCED

NOTICE DATE:  April 9, 2018
NOTICE TYPE:  W-B040918-01 Operations
SHORT DESCRIPTION:  Implementation of maximum shadow price for a consistently irresolvable constraint in SCED
INTENDED AUDIENCE:  ERCOT Market Participants
DAY AFFECTED:  April 9, 2018
LONG DESCRIPTION:  On April 9, 2018, ERCOT is implementing a modified maximum shadow price for a constraint that was found to be consistently irresolvable per the criteria defined in Section 3.6.1 of the business practice document, "Setting the Shadow Price Caps and Power Balance Penalties in Security Constrained Economic Dispatch."  The update to the maximum shadow price will occur between 2:00 PM and 3:00PM.  The contingency/constraint pair and updated maximum shadow price (set in accordance with Section 3.6.2 of the business practice document) are as follows:
Contingency Name

Constraint Name

From Station/kV

Description

Maximum Shadow Price

SWINYUC8

M_69_F3_1

WICKETT/69

Loss of the 138 kV line from Wink Sub to Yucca Drive Switch overloading the 69 kV line from Winkler County 6 TNP to Wickett TNP

$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]<mailto:[log in to unmask]>.
If you are receiving email from a public ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.


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