NPRR255

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

Date	Gov Body		Next Steps
10/19/2010	Board of Directors	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
08/03/2010	NATF		PRS language consideration
07/22/2010	PRS	Referred	NATF consideration of NPRR255

Date	Gov Body	Motion	Result	Against	Abstentions
10/19/2010	Board of Directors	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	0	0
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	0	2 Ind Gen
09/23/2010	PRS	To table NPRR255 until the next PRS meeting.	Passed	0	0
08/19/2010	PRS	To recommend approval of NPRR255 as submitted.	Passed	0	0
07/22/2010	PRS	To refer NPRR255 to the Nodal Advisory Task Force (NATF)	Passed	0	0

Status:	Approved
Date Posted:	07/15/2010
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.