NOGRR067

    Summary

    Title: Review and Analysis of Turbine Speed Governor Performance
    Next Group:
    Next Step:
    Status: Approved on 10/06/2011
    Effective Date: 11/01/2011 – 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

    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.

    Background

    Status: Approved
    Date Posted: 03/10/2011
    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