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PGRR002

Summary

Title New Planning Guide Section 2, Definitions and Acronyms, and Section 8, Planning Reserve Margin (PRM) and Associated Change Process for the PRM (formerly "New Planning Guide Section 2, Definitions and Acronyms, and Section 8, Planning Reserve Margin")
Next Group
Next Step
Status Approved on 04/19/2011
Effective Dates
05/01/2011

Action

Date Gov Body Action Taken Next Steps
04/19/2011 BOARD Approved
03/03/2011 TAC Recommended for Approval ERCOT Board Consideration
02/18/2011 ROS Recommended for Approval TAC Consideration
01/21/2011 PLWG Recommended for Approval ROS Consideration
12/13/2010 PLWG Recommended for Approval IA Review

Voting Record

Date Gov Body Motion Result
04/19/2011 BOARD T approve PGRR002 as recommended by TAC in the 3/3/11 TAC Report Passed
03/03/2011 TAC To recommend approval of PGRR002 as recommended by ROS in the 2/18/11 ROS Report Passed
02/18/2011 ROS To recommend approval of PGRR002 as revised by the 2/4/11 ERCOT comments Passed
01/21/2011 PLWG Consensus to endorse and forward the 12/13/10 PLWG Report and the Impact Analysis for PGRR002 to ROS
12/13/2010 PLWG Consensus to recommend approval of PGRR002 as revised by the PLWG

Background

Status: Approved
Date Posted: Nov 12, 2010
Sponsor: PLWG
Urgent: No
Sections: 2 (new), 2.1 (new), 2.2 (new), 8 (new), 8.1 (new), 8.2 (new), 8.3 (new), 8.3.1 (new), 8.3.2 (new)
Description: This Planning Guide Revision Request (PGRR) incorporates the following into the Planning Guide: (1) Planning Reserve Margin (PRM) and the minimum PRM requirement. (2) The methodology to be used by ERCOT to calculate its Seasonal (i.e., Summer and Winter) PRM. This methodology is based on the ERCOT reserve margin calculation methodology developed by the Generation Adequacy Task Force (GATF) and approved by the ERCOT Board in May 2005. (3) Changes in the PRM calculation methodology developed by the GATF and approved by TAC in February 2010. (4) Current ERCOT reserve margin planning criterion of 13.75%. (5) New Section 2 to the Planning Guides which adds relevant terms and definitions used in the Planning Guide not defined in the Protocols. To allow for inclusion of the definitions and acronyms into the Planning Guide as Section 2, the current Section 2, Process for Planning Guide Revision, will be renumbered as Section 1, Process for Planning Guide Revision. (6) Changes in Section 2.1 to incorporate an administrative change process for the PRM.
Reason: Currently, the definition of the PRM, current minimum PRM planning criterion (13.75%), and methodology necessary to calculate the PRM are not included in the Protocols, Operating Guides or Planning Guide. Because of the market and reliability impacts of the PRM, it is necessary for these items to be included in the Protocols, Operating Guides or Planning Guide. The Planning Working Group (PLWG) recommends that this information be inserted into the ERCOT Planning Guide to ensure visibility to the market and to provide for a structured change process to ensure that any modification to the definition or calculation of the PRM can be fully vetted by Market Participants. A central location for terms and definitions specific to the Planning Guides is needed.

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