Title: Energy Offer Curve Requirements for Generation Resources Assigned Non-Spin Responsibility
Next Group:
Next Step:
Status: Approved on 12/12/2011
Effective Dates:


Date Gov Body Action Taken Next Steps
12/12/2011 BOARD Approved
12/01/2011 TAC Recommended for Approval ERCOT Board Consideration
11/17/2011 PRS Recommended for Approval TAC Consideration

Voting Record

Date Gov Body Motion Result
12/12/2011 BOARD To approve NPRR428 as recommended by TAC in the 12/1/11 TAC Report Passed
12/01/2011 TAC To recommend approval of NPRR428 as recommended by PRS in the 11/17/11 PRS Report, as amended by the 11/29/11 ERCOT comments and as revised by TAC Passed
11/17/2011 PRS To recommend approval of NPRR428 as revised by PRS; an effective date of January 5, 2012; and to forward NPRR428 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: Nov 9, 2011
Sponsor: ERCOT
Urgent: Yes
Description: This Nodal Protocol Revision Request (NPRR) adds a requirement for the Energy Offer Curve to be at or above $120 for On-Line Non-Spinning Reserve (Non-Spin) capacity and at or above $180 for Off-Line Non-Spin capacity. If Non-Spin Ancillary Service Resource Responsibility is reassigned to a Generation Resource during the Adjustment Period in accordance with Section 6.4.6, QSE-Requested Decommitment of Resources and Changes to Ancillary Service Resource Responsibility of Resources, the Qualified Scheduling Entity (QSE) shall submit an Energy Offer Curve that meets the requirements of Section for the Generation Resource newly assigned Ancillary Service Resource Responsibility for Non-Spin prior to the end of the Adjustment Period. If the Ancillary Service Resource Responsibility for Non-Spin is reassigned in accordance with Section 6.4.6 from a Generation Resource that experiences a Forced Outage, Derate, or Startup Loading Failure during the Operating Period, the QSE shall submit an Energy Offer Curve that meets the requirements of Section as soon as reasonably practicable after the event. QSE updates to an Energy Offer Curve entered at the end of the Adjustment Period become effective in ERCOT systems at the next Operating Period. Therefore, if Non-Spin is moved from one Generation Resource to another in the QSE's portfolio during an Operating Hour, any change to the Energy Offer Curve will be effective in the next Operating Period. There will not be any validation rules to verify the requirements added by this NPRR. The onus is on all QSEs to make the submission/telemetry changes needed to implement these new requirements.
Reason: To address the Commission’s discussion raised at the October 27, 2011 Public Utility Commission of Texas (PUCT) Open Meeting regarding Project No. 37897, PUC Proceeding Relating to Resource and Reserve Adequacy and Shortage Pricing.

Key Documents

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