Title: Modifications to Planning Reserve Margin Inputs
Next Group:
Next Step:
Status: Approved on 11/19/2013
Effective Dates:


Date Gov Body Action Taken Next Steps
11/19/2013 BOARD Approved
11/07/2013 TAC Recommended for Approval ERCOT Board consideration
10/03/2013 TAC Deferred/Tabled TAC Consideration
09/19/2013 PRS Recommended for Approval TAC Consideration
08/22/2013 PRS Recommended for Approval PRS IA Review
07/18/2013 PRS Deferred/Tabled PRS Language Consideration

Voting Record

Date Gov Body Motion Result
11/19/2013 BOARD Approved NPRR550 as recommended by TAC in the 11/7/13 TAC Report Passed
11/07/2013 TAC To recommend approval of NPRR550 as recommended by PRS in the 9/19/13 PRS Report. Passed
10/03/2013 TAC To grant NPRR550 Urgent status and to table NPRR550 for one month Passed
09/19/2013 PRS To endorse and forward the 8/22/13 PRS Report as amended by the 9/9/13 ERCOT comments and the Impact Analysis for NPRR550 to TAC Passed
08/22/2013 PRS To recommend approval of NPRR550 as amended by the 7/1/13 ERCOT comments and as revised by PRS Passed
07/18/2013 PRS To table NPRR550 Passed

Vote tallies here reflect individual votes, not the weight of the votes by market segment. Affirmative votes are not recorded in these vote tallies. For additional details on the voting record, please consult the Recommendation or Action Report, or the official vote tally if available, as posted in the key documents.


Status: Approved
Date Posted: Jun 27, 2013
Sponsor: GATF
Urgent: Yes
Sections:,,, 21.1
Description: This Nodal Protocol Revision Request (NPRR) proposes modifications to the Planning Reserve Margin (PRM) based on the results of the 2012 ERCOT Loss of Load Study and subsequent discussions of the Generation Adequacy Task Force (GATF).
Reason: To update the PRM calculations based on the 2012 Loss of Load Study. WMS endorsed the language contained herein at its June 12, 2013 meeting.

Key Documents

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