Title Day-Ahead Market Timing Deviations
Next Group
Next Step
Status Approved on 08/11/2020
Effective Dates


Date Gov Body Action Taken Next Steps
08/11/2020 BOARD Approved
06/24/2020 TAC Recommended for Approval Revision Request Consideration
02/13/2020 PRS Recommended for Approval Revision Request Consideration
01/16/2020 PRS Recommended for Approval Impact Analysis Consideration
10/18/2018 PRS Deferred/Tabled Language Consideration

Voting Record

Date Gov Body Motion Result
08/11/2020 BOARD to approve NPRR903 as recommended by TAC in the 6/24/20 TAC Report Passed
06/24/2020 TAC to recommend approval of NPRR903 as recommended by PRS in the 2/13/20 PRS Report as amended by the 3/24/20 ERCOT comments Passed
02/13/2020 PRS to endorse and forward to TAC the 1/16/20 PRS Report and the Revised Impact Analysis for NPRR903 Passed
01/16/2020 PRS to recommend approval of NPRR903 as amended by the 12/9/19 Joint Commenters comments as revised by PRS Passed
10/18/2018 PRS to table NPRR903 and refer the issue to WMS Passed


Status: Approved
Date Posted: Oct 2, 2018
Sponsor: ERCOT
Urgent: No
Sections: 4.1.2 and 9.14.10 (new)
Description: This Nodal Protocol Revision Request (NPRR) clarifies the deviations that may occur due to Day-Ahead Market (DAM) delays, and adds language requiring ERCOT to issue a Market Notice for any act or omission that it takes to ensure that the DAM process completes by 1900. If the 1000 DAM submission deadline or the 1330 DAM publishing deadline is delayed, ERCOT will enter an Advisory as soon as possible. However, if additional actions and/or omissions are taken to ensure that DAM publishes for that Operating Day, ERCOT will issue a Market Notice no later than 1700 Central Prevailing Time (CPT) on the next Business Day. ERCOT intends to take any reasonable action necessary to avoid aborting DAM. Further, this NPRR memorializes 1900 as the latest point in time that DAM can publish. In the event that DAM must be aborted, this particular time was chosen to accommodate the time necessary to execute a Supplemental Ancillary Services Market (SASM) and/or Reliability Unit Commitment (RUC) prior to the start of the Operating Day.
Reason: Addresses current operational issues

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