SCR785

    Summary

    Title: Update RTL calculation to include Real-Time Reserve Price Adder based components
    Next Group: PRS
    Next Step: PRS for consideration
    Status: Withdrawn

    Action

    Date Gov Body Action Taken Next Steps
    11/06/2014 PRS Deferred/Tabled PRS for consideration

    Voting Record

    Date Gov Body Motion Result
    11/06/2014 PRS To table SCR785 and to refer the issue to WMS. Passed

    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    Status: Withdrawn
    Date Posted: 01/20/2017
    Sponsor: ERCOT
    Urgent: Pending
    Sections: 16.11.4.3
    Description: The Real-Time Liability (RTL) component of credit calculations estimates settlement risk for unsettled operating days. RTL currently does not include changes in exposure from Real Time Reserve Price Adder Based on Operating Reserve Demand Curve (ORDC) related calculations. This SCR is to update RTL to include the effect of certain ORDC exposure determinants. 1. Modifies the Real-Time Liability (RTL) calculation to include an estimated amount of the following determinants; a. RTASIAMT (Real-Time Ancillary Service Imbalance Amount) based on calculations defined in paragraphs (6) of Protocol Section 6.7.4 Real-Time Ancillary Service Imbalance Payment or Charge, b. RTRUCRSVAMT (Real-Time RUC Ancillary Service Reserve based on calculations defined in paragraphs (7) of Protocol Section 6.7.4.6 Real-Time Ancillary Service Imbalance Payment or Charge Amount), and c. LAASIRNAMT (Real-Time Ancillary Service Imbalance Revenue Neutrality Allocation) based on calculations defined in Protocol Section 6.7.5 Real-Time Ancillary Service Imbalance Revenue Neutrality Allocation. NPRR 626, "Reliability Deployment Price Adder", also adjusts the RTL calculation to reflect other ORDC determinants that are not within the scope of this SCR. This SCR was proposed when it was determined that NPRR626 did not include all applicable RTL determinants.
    Reason: To more closely align calculated credit exposure with Real-Time Market (RTM) Settlement risk.

    Key Documents