MIS LOG IN

NOGRR109

Summary

Title Revisions to Definition of Credible Single Contingency for Operations Planning
Next Group
Next Step
Status Approved on 01/28/2014
Effective Dates
02/01/2014

Action

Date Gov Body Action Taken Next Steps
01/28/2014 TAC Approved
10/03/2013 TAC Deferred/Tabled TAC for consideration
09/12/2013 ROS Recommended for Approval TAC Consideration
07/11/2013 ROS Deferred/Tabled ROS Consideration
06/19/2013 OWG Recommended for Approval ROS Consideration
06/13/2013 ROS Remanded OWG Consideration
04/17/2013 OWG Recommended for Approval ROS Consideration
03/20/2013 OWG Recommended for Approval OWG IA Review

Voting Record

Date Gov Body Motion Result
01/28/2014 TAC To approve NOGRR109 as recommended by ROS in the 9/12/13 ROS Report. Passed
10/03/2013 TAC To table NOGRR109 until associated Constraint Management Plan NPRRs are approved. Passed
09/12/2013 ROS To recommend approval of NOGRR109 as recommended by OWG in the 6/19/13 OWG Report Passed
07/11/2013 ROS To table NOGRR109 Passed
06/19/2013 OWG To recommend approval of NOGRR109 as amended by the 6/14/13 CenterPoint Energy comments and as revised by OWG.
06/13/2013 ROS To remand NOGRR109 to OWG for one month Passed
04/17/2013 OWG Consensus to endorse and forward the 3/20/13 OWG Report and Impact Analysis for NOGRR109 to ROS
03/20/2013 OWG Consensus to recommend approval of NOGRR109 as revised by OWG

Background

Status: Approved
Date Posted: Mar 5, 2013
Sponsor: Operations Working Group (OWG)
Urgent: No
Sections: 1.4
Description: This Nodal Operating Guide Revision Request (NOGRR) deletes the definition of Credible Single Contingency from the Operating Guides.
Reason: The original intent of this NOGRR was to respond to the 2/14/13 ROS directive to the Operations Working Group (OWG) and based on the recommendation of the Operations and Planning Synchronization Task Force (OPSTF) regarding Issue 6 of the OPSTF Issues List Matrix, which relates to the "[u]se of double circuit contingencies to develop operating limits." The OPSTF recommendation is as follows: "OPSTF discussed a proposal that a DCKT outage be considered only if it caused a reliability problem. The 'push-back' was that it is hard for the market to model contingencies that are sometimes run and sometimes not. ERCOT commented that this would be complex, burdensome and require new tools for System Operations. OPSTF recommends that ROS direct OWG to modify the Operating Guides language (pg. 1-15) to better reflect the actual practice." After further review, the OWG has agreed to delete the definition of Credit Single Contingency from the Nodal Operating Guides. The definition will be incorporated in the Protocols as the use of the term is being introduced in Nodal Protocol Revision Request (NPRR) 540, Clarification of Credible Single Contingency.

Key Documents