NOTICE DATE:  October 9, 2014
NOTICE TYPE:  W-A100914-01 Operations
SHORT DESCRIPTION:  Implementation of maximum shadow price for an irresolvable constraint in SCED
INTENDED AUDIENCE:  ERCOT Market Participants
DAY AFFECTED:  October 9, 2014
LONG DESCRIPTION:  On October 9, 2014, 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 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

SLA_RIO8

HARLNS_OLEAND1_1

Loss of the 138 kV line from Las Palma to Rio Hondo overloading the 69 kV line from Harlingen #1 - Oleander

$2,000.00


ADDITIONAL INFORMATION:  The business practice document is posted under Key Documents on the Real-Time Market webpage<http://www.ercot.com/mktinfo/rtm/>.
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