NPRR903  Day-Ahead Market Timing Deviations

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.