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NPRR255

Summary

Title: Resolution of Alignment Item A81 - DRUC Timing and Execution when DAM is Delayed or Aborted
Next Group:
Next Step:
Status: Approved on 10/19/2010
Effective Dates:
12/01/2010

or per the Nodal Protocol Transition Plan http://www.ercot.com/mktrules/protocols (11/01/10 Nodal Protocols Library)

Action

Date Gov Body Action Taken Next Steps
10/19/2010 BOARD Approved
10/07/2010 TAC Recommended for Approval ERCOT Board consideration of NPRR255
10/04/2010 PRS Recommended for Approval TAC consideration of NPRR255
09/23/2010 PRS Deferred/Tabled PRS Impact Analysis review
08/19/2010 PRS Recommended for Approval PRS Impact Analysis review
07/22/2010 PRS Referred NATF consideration of NPRR255

Voting Record

Date Gov Body Motion Result
10/19/2010 BOARD To approve NPRR255 as recommended by TAC in the 10/7/10 TAC Report. Passed
10/07/2010 TAC To recommend approval of NPRR255 as recommended by PRS in the 10/4/10 PRS Report. Passed
10/04/2010 PRS To endorse and forward the 8/19/10 PRS Report as amended by the 9/30/10 ERCOT comments and Impact Analysis for NPRR255 to TAC. Passed
09/23/2010 PRS To table NPRR255 until the next PRS meeting. Passed
08/19/2010 PRS To recommend approval of NPRR255 as submitted. Passed
07/22/2010 PRS To refer NPRR255 to the Nodal Advisory Task Force (NATF) 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: Approved
Date Posted: Jul 14, 2010
Sponsor: ERCOT
Urgent: No
Sections: 4.1.2, 5.2.1, 5.2.2 (new), 5.2.2.1 (new), 5.2.2.2 (new)
Description: This Nodal Protocol Revision Request (NPRR) adds new Section 5.2.2 to describe the process that ERCOT will follow in the event that the Day-Ahead Market (DAM) is delayed or aborted.
Reason: This change conforms the Nodal Protocols to the as-built ERCOT Nodal System Administrative Controls. If the DAM is delayed but executes, ERCOT will execute a Day-Ahead Reliability Unit Commitment (DRUC) no sooner than one hour following the completion of the delayed DAM and the sequence of events will be the same as for the normal Reliability Unit Commitment (RUC) timeline. If the DAM is aborted, ERCOT will not have procured Ancillary Services to meet the needs of the ERCOT Ancillary Service Plan posted prior to the aborted DAM. In this case ERCOT will use the Supplemental Ancillary Services Market (SASM) process described in Section 6.4.8.2, Supplemental Ancillary Services Market, to procure the amount of Ancillary Services not provided as self-arranged by the Qualified Scheduling Entities (QSEs) for the next Operating Day.

Key Documents

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