Title: As-Built Clarification and Corrections Related to NPRR568 and NPRR555
Next Group:
Next Step:
Status: Approved on 02/11/2014
Effective Dates:


Date Gov Body Action Taken Next Steps
02/11/2014 BOARD Approved
01/28/2014 TAC Recommended for Approval ERCOT Board consideration of NPRR591
01/16/2014 PRS Recommended for Approval TAC consideration of NPRR591

Voting Record

Date Gov Body Motion Result
02/11/2014 BOARD
01/28/2014 TAC To recommend approval of NPRR591 as recommended by PRS in the 1/16/14 PRS Report. Passed
01/16/2014 PRS To recommend approval of NPRR591 as revised by PRS and to forward NPRR591 to TAC. 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.


Status: Approved
Date Posted: Jan 9, 2014
Sponsor: ERCOT
Urgent: Yes
Sections:,, 6.7.4,
Description: This NPRR proposes changes that clarify ERCOT’s intended implementation of the Settlement formulas in NPRR568 and that align the Protocols with the Settlement mechanisms that ERCOT’s system design and requirements analysis has concluded are essential to implement NPRR568. In effect this NPRR provides "as-built" modifications to the requirements of NPRR568. This NPRR proposes the following clarifying and corrective language in Section 6.7.4: 1) Repairs an erroneous reference made in paragraph (3); 2) Details the Settlement inputs to the Off-Line reserve calculation that will be utilized in Phase 1 implementation of NPRR568 in lieu of the RTOFF30 telemetry, which will be available in Phase 2; 3) Removes Real-Time On-Line Non-Spin Schedule for Generation Resources (RTOLNSRS) from the calculation of the On-Line and Off-Line reserves because it has no impact on the calculated result for the Real-Time Ancillary Service imbalance quantity (as currently written, it is added into the Qualified Scheduling Entity’s (QSE’s) value for On-Line capacity (RTOLCAP) but subsequently subtracted back out of the value during the calculation of the QSE’s imbalance quantity (RTASOLIMB), thus having no impact on the calculated value); 4) Clarifies intermediate calculations for QSE-level data that ERCOT, through its design discussions, has determined must be performed within the Settlement system rather than in the Market Management System (MMS), thereby providing additional billing determinants necessary for shadow Settlement (calculated values include: RTASOFF, RTRUCNBBRESP, RTNCLRNSRESP, RTCLRNSRESP, RTRMRRESP, RTNCLRRRS, RTOLHSL, RTMGQ, RTCLRREG, RTCLRRRS, RTNCLRNS, RTCLRNS, RTRUCRESP, RTCLRNPF, and RTCLRLSL); and 5) Makes additional clarifying edits to various variable definitions, in light of the additional settlement data points. This NPRR also corrects one reference to "OFF10" in Section that should have been a reference to "OFF30." In addition, this NPRR updates grey-boxed language associated with NPRR555 to reflect the subsequent approval of NPRR568. In new Section, RTM Energy Bid Criteria, references to Protocol sections that were deleted by NPRR568 have been deleted. Also, in Section, references to "ONRL Resource Status" have been deleted from the NPRR555 grey box, as this Resource Status will not be used by Load Resources providing Non-Spin following NPRR555 implementation.
Reason: This NPRR aligns the Protocols with the necessary implementation of the Settlement provisions of NPRR568, and provides additional data for QSE shadow Settlement. This NPRR also corrects NPRR555 language to reflect approval of NPRR568.

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