Title: Clarify QSE’s Ability to Make Changes to Ancillary Service Resource Responsibility In Real Time
Next Group:
Next Step:
Status: Approved on 03/22/2011
Effective Dates:


Date Gov Body Action Taken Next Steps
03/22/2011 BOARD Approved
01/06/2011 TAC Recommended for Approval ERCOT Board consideration of NPRR275
12/16/2010 PRS Recommended for Approval TAC consideration of NPRR275
11/18/2010 PRS Recommended for Approval PRS Impact Analysis review
11/04/2010 TAC Remanded PRS consideration of NPRR275
10/07/2010 Under Appeal TAC consideration of ERCOT appeal
09/23/2010 PRS Rejected

Voting Record

Date Gov Body Motion Result
03/22/2011 BOARD To approve NPRR275 as recommended by TAC in the 1/6/11 TAC Report. Passed
01/06/2011 TAC To recommend approval of NPRR275 as recommended by PRS in the 12/16/10 PRS Report and as revised by TAC. Passed
12/16/2010 PRS To endorse and forward the 11/18/10 PRS Report and Impact Analysis for NPRR275 to TAC with a proposed effective date of March 1, 2011. Passed
11/18/2010 PRS To recommend approval of NPRR275 as amended by the 11/16/10 NATF comments and as revised by PRS. Passed
11/04/2010 TAC To remand NPRR275 to PRS and to request that NATF also consider NPRR275 and provide feedback to PRS. Passed
09/23/2010 PRS To reject NPRR275. 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: Sep 16, 2010
Sponsor: ERCOT
Urgent: No
Sections: 6.3.1, 6.3.2, 6.4.6,
Description: This Nodal Protocol Revision Request (NPRR) clarifies the responsibility of Qualified Scheduling Entities (QSEs) to telemeter the Ancillary Service Resource Responsibility for each Resource in Real-Time.
Reason: ERCOT performs studies on the deliverability of Ancillary Services as part of its responsibilities in the Operating Period described in Section, Evaluation and Maintenance of Ancillary Service Capacity Sufficiency. Just as the status of Resources is studied for having sufficient capacity based on QSE provided information in the Current Operating Plan (COP), a similar study to validate the deliverability of Ancillary Services from those Resources is also performed on the Ancillary Service Resource Responsibility information provided from the COP. Any changes to Ancillary Service Resource Responsibility subsequent to the study must be communicated to ERCOT to assure continued deliverability of Ancillary Services. As such, this NPRR clarifies that QSEs may only change the Ancillary Service Resource Responsibility that was previously presented in the COP in the time window beginning 30 seconds prior to the five-minute clock interval and ending ten seconds prior to that five-minute clock interval. QSEs must communicate such changes to ERCOT via telemetry.

Key Documents

Related Content