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NPRR #489 · Revision Request

NPRR489  Planning Reserve Margin

Approved sponsor NRG Energy, Inc. posted 2012-10-03 ercot.com
ReasonThe calculation methodology used by ERCOT to determine the PRM for the semi-annual Capacity, Demand and Reserves Report has historically been developed by the Generation Adequacy Task Force (GATF), subsequently approved by the Wholesale Market Subcommittee (WMS), and then ultimately approved by the Technical Advisory Committee (TAC). In 2010, Market Participants decided that adding the PRM methodology into the Planning Guide would increase the transparency of the PRM methodology, and also provide a formal change and approval procedure via the Planning Guide Revision Request (PGRR) process. Including the PRM methodology in the Planning Guide also provided for ERCOT Board approval. The PGRR approval requires a recommendation from the Planning Working Group (PLWG), the Reliability and Operations Subcommittee (ROS), TAC, and finally ERCOT Board approval. While this approval path achieved its objective (i.e., to improve and formalize the PRM approval process) it did not include language acknowledging that the PRM methodology had historically been under GATF and WMS purview. Discussions at WMS and ROS resulted in both subcommittees agreeing the PRM calculation methodology: (1) Is important enough that it needs to be transparent; (2) Needs input from WMS, ROS, and any other interested stakeholder body or Market Participant, and (3) Should receive ERCOT Board approval. It was also determined the best way to meet these three goals is to move the PRM methodology from the Planning Guide to the Protocols.
Created2012-10-18
Approved2013-03-19
Sections Affected
2.12.23.2.6 (new)3.2.6.1 (new)3.2.6.2 (new)3.2.6.2.1 (new)3.2.6.2.2 (new)21.1
Summary
This Nodal Protocol Revision Request (NPRR) adds the Planning Reserve Margin (PRM) methodology, currently in the Planning Guide, to the Protocols.
Action Log 5 milestones
Amendments
DateBodyMotionResult
Oct 18 '12PRS To recommend approval of NPRR489 as amended by the 10/17/12 ERCOT comments and as revised by PRSPassed
Jan 3 '13TAC To recommend approval of NPRR489 as amended by the 12/7/12 NRG Energy, Inc. commentsPassed
Mar 19 '13BOARD To approve NPRR489 as revised by the 2/18/13 ERCOT CommentsPassed
Documents 12
NameTypePostedClassification
489NPRR-01 Planning Reserve Margin 100312 doc Oct 3 '12 Revision Request
489NPRR-02 ERCOT Comments 101712 doc Oct 17 '12 Revision Request Comments
489NPRR-03 Sierra Club Comments 101712 doc Oct 17 '12 Revision Request Comments
489NPRR-04 PRS Report 101812 doc Oct 23 '12 Committee Report
489NPRR-05 Impact Analysis 103112 doc Oct 31 '12 Staff Report
489NPRR-06 PRS Report 111312 doc Nov 20 '12 Committee Report
489NPRR-07 TAC Report 112912 doc Dec 5 '12 Committee Report
489NPRR-08 NRG Energy, Inc. 120712 doc Dec 7 '12 Revision Request Comments
489NPRR-09 TAC Report 010313 doc Jan 4 '13 Committee Report
489NPRR-10 ERCOT Comments 021813 doc Feb 18 '13 Revision Request Comments
489NPRR-11 TAC Comments 030713 doc Mar 7 '13 Revision Request Comments
489NPRR-12 Board Report 031913 doc Mar 22 '13 Committee Report
Meetings That Took It Up 9
DateMeetingCommitteeStatus
Mar 19 '13 Board of Directors Meeting BOARD Concluded
Mar 7 '13 Technical Advisory Committee (TAC) Meeting TAC Concluded
Jan 3 '13 Technical Advisory Committee (TAC) Meeting TAC Concluded
Dec 5 '12 Wholesale Market Subcommittee (WMS) Meeting WMS Concluded
Nov 29 '12 Technical Advisory Committee (TAC) Meeting TAC Concluded
Nov 15 '12 Protocol Revision Subcommittee (PRS) Meeting PRS Concluded
Nov 7 '12 Wholesale Market Subcommittee (WMS) Meeting WMS Concluded
Oct 19 '12 Generation Adequacy Task Force (GATF) Meeting GATF Concluded
Oct 18 '12 Protocol Revision Subcommittee (PRS) Meeting PRS Concluded