MIS LOG IN

PGRR022

Summary

Title Removal of Planning Reserve Margin Calculation Methodology
Next Group
Next Step
Status Approved on 03/19/2013
Effective Dates
04/01/2013

Action

Date Gov Body Action Taken Next Steps
03/19/2013 BOARD Approved
02/07/2013 TAC Recommended for Approval ERCOT Board Consideration
01/10/2013 ROS Recommended for Approval TAC Consideration
12/04/2012 PLWG Recommended for Approval ROS Consideration
10/25/2012 PLWG Recommended for Approval PLWG IA Review

Voting Record

Date Gov Body Motion Result
03/19/2013 BOARD To approve PGRR022 as recommended by TAC in the 2/7/13 TAC Report Passed
02/07/2013 TAC To recommend approval of PGRR022 as recommended by ROS in the 1/10/13 ROS Report Passed
01/10/2013 ROS To recommend approval of PGRR022 as recommended by PLWG in the 12/4/12 PLWG Report Passed
12/04/2012 PLWG To endorse and forward the 10/25/12 PLWG Report and Impact Analysis for PGRR022 to ROS
10/25/2012 PLWG Consensus to recommend approval of PGRR022 as submitted

Background

Status: Approved
Date Posted: Oct 5, 2012
Sponsor: NRG Energy, Inc.
Urgent: No
Sections: 1.2.1, 2.1, 2.2, 8, 8.1, 8.2, 8.3, 8.3.1, 8.3.2
Description: This Planning Guide Revision Request (PGRR) deletes Section 8, Planning Reserve Margin, from the Planning Guide. The Planning Reserve Margin (PRM) is being added to the Protocols via Nodal Protocol Revision Request (NPRR) 489, Planning Reserve Margin.
Reason: The calculation methodology used by ERCOT to determine the PRM for the semi-annual Report on Capacity, Demand and Reserves in the ERCOT Region (CDR) has historically been developed by the Generation Adequacy Task Force (GATF), subsequently approved by WMS, and then ultimately approved by 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 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), ROS and 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.

Key Documents

Related Content