NOTICE DATE:  November 20, 2012

NOTICE TYPE:  M-B112012-01 NPRR

SHORT DESCRIPTION:  Implementation details for NPRR469 and NPRR472

INTENDED AUDIENCE:  ERCOT Market Participants

DAY AFFECTED:  December 6, 2012

LONG DESCRIPTION:  On December 6, 2012, ERCOT will implement Nodal Protocol Revision Request (NPRR) 469, Modifications to CCTs, and NPRR 472, Implementation Clarifications for Consideration of DC Tie Lines and Outages in CCTs and Modification to the Long Term CCT (formerly “Implementation Clarifications for Consideration of DC Tie Lines and Outages in CCTs”).

NPRR469, which was approved by the ERCOT Board on July 17, 2012, improves the process for determining Competitive Constraints and non-Competitive Constraints. NPRR469 was partially implemented on August 1, 2012, and the implementation will be complete with the implementation of revision language in the following Protocol Sections on December 6, 2012.

· Section 3.19, Constraint Competitiveness Test

· Section 3.19.1, Annual Competitiveness Test

· Section 3.19.2, Monthly Competitiveness Test

· Section 3.19.3, Daily Competitiveness Test

· Section 6.5.7.3, Security Constrained Economic Dispatch

NPRR472, which was approved by the ERCOT Board on September 18, 2012, changes some of the language that was approved as part of NPRR469 in regards to how Direct Current Tie (DC Tie) lines are considered in Constraint Competitiveness Tests (CCTs) and to remove planned transmission and Resource Outages from the Long-Term CCT.

ADDITIONAL INFORMATION:  Pursuant to Protocol Section 21.6, Nodal Protocol Revision Implementation, ERCOT is required to provide notice as soon as practicable, but no later than ten days prior to implementation. 

NPRR469 and associated documents can be found on the ERCOT website, under Market Rules, at http://www.ercot.com/mktrules/issues/nprr/451-475/469/index.

NPRR472 and associated documents can be found on the ERCOT website, under Market Rules, at http://www.ercot.com/mktrules/issues/nprr/451-475/472/index.

Information on upcoming releases can be found on the ERCOT Multi Year Project Priority List (PPL) at http://www.ercot.com/services/projects/.

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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