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NOGRR067

Summary

Title Review and Analysis of Turbine Speed Governor Performance
Next Group
Next Step
Status Approved on 10/06/2011
Effective Dates
10/31/2011

All

Action

Date Gov Body Action Taken Next steps
10/06/2011 TAC Approved
09/15/2011 ROS Recommended for Approval TAC Consideration
08/17/2011 OWG Recommended for Approval ROS Consideration
07/20/2011 OWG Deferred/Tabled OWG Review
06/15/2011 OWG Recommended for Approval Impact Analysis Consideration
05/18/2011 OWG Deferred/Tabled OWG Language Consideration
04/20/2011 OWG Deferred/Tabled OWG Language Consideration

Voting Record

Date Gov Body Motion Result
10/06/2011 TAC To approve NOGRR067 as recommended by ROS in the 9/15/11 ROS Report Passed
09/15/2011 ROS To recommend approval of NOGRR067 as recommended by OWG in the 8/17/11 OWG Report Passed
08/17/2011 OWG Consensus to endorse and forward the 6/15/11 OWG Report and Impact Analysis for NOGRR067 to TAC
07/20/2011 OWG Consensus to table NOGRR067
06/15/2011 OWG To recommend approval of NOGRR067 as amended by the 6/13/11 Luminant comments. Passed
05/18/2011 OWG Consensus to table NOGRR067
04/20/2011 OWG Consensus to table NOGRR067 for one month

Background

Status: Approved
Date Posted: Mar 10, 2011
Sponsor: Luminant
Urgent: No
Sections: 2.2.7
Description: This Nodal Operating Guide Revision Request (NOGRR) provides a clearer explanation of the review and analysis performed by a Qualified Scheduling Entity (QSE) related to turbine speed Governor performance during periods of ERCOT System frequency deviations. It also changes the term "frequency deviations" to "frequency disturbance events" consistent with the scope of the Performance Disturbance Compliance Working Group (PDCWG).
Reason: The current language only says that QSEs shall "monitor" generating unit turbine speed Governor performance. In actuality, each QSE that has a representative serving on the PDCWG reviews and analyzes Generation Resource turbine speed Governor performance for every frequency disturbance event that occurs in ERCOT. A frequency disturbance event is defined by the PDCWG as "system events of +/- 0.1 Hz or greater." Thus, a more accurate description of the actual work being done by QSEs is "review and analyze" as opposed to just "monitor". Also, since the existing term "frequency deviations" is vague and undefined, this NOGRR also revises that term to be "frequency disturbance events" consistent with the PDCWG scope document.

Key Documents