Title: Requirements for Energy Offer Curves in the Real Time SCED for Generation Resources Committed in RUC
Next Group:
Next Step:
Status: Approved on 02/21/2012
Effective Dates:


Date Gov Body Action Taken Next Steps
02/21/2012 BOARD Approved
02/02/2012 TAC Recommended for Approval ERCOT Board consideration of NPRR435
01/19/2012 PRS Recommended for Approval TAC consideration of NPRR435

Voting Record

Date Gov Body Motion Result
02/21/2012 BOARD To approve NPRR435 as recommended by TAC in the 2/2/12 TAC Report. Passed
02/02/2012 TAC To recommend approval of NPRR435 as recommended by PRS in the 1/19/12 PRS Report and as revised by TAC. Passed
01/19/2012 PRS To recommend approval of NPRR435 as amended by the 1/10/12 Luminant-Exelon comments and as revised by PRS and to forward NPRR435 and the Impact Analysis 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 3, 2012
Sponsor: ERCOT
Urgent: Yes
Sections: (new)
Description: This Nodal Protocol Revision Request (NPRR) adds a requirement for the Qualified Scheduling Entity (QSE) of a Generation Resource committed by the Reliability Unit Commitment (RUC) process to submit an Energy Offer Curve that prices all energy from Low Sustained Limit (LSL) to High Sustained Limit (HSL) at the System-Wide Offer Cap (SWCAP) for RUC committed intervals. When Generation Resources are committed in the Day Ahead or during the Adjustment Period in the RUC process, the QSE shall submit an Energy Offer Curve for the Generation Resource that meets the above requirements no later than the end of the Adjustment Period immediately preceding the Operating Period that includes an Operating Hour coincident with the first hour of the RUC Dispatch Instruction. QSE updates to an Energy Offer Curve entered at the end of the Adjustment Period become effective in ERCOT systems at the start of the next Operating Period. Therefore, if a Generation Resource is committed by an ERCOT Operator issued Verbal Dispatch Instruction(VDI) for the Operating Hour in the immediate Operating Period, then it is expected that the QSE shall submit an Energy Offer Curve that meets the requirements described above as soon as reasonably practicable after receipt of the VDI. ERCOT systems will not validate that the Energy Offer Curve for RUC-committed Generation Resources meet the requirements described above. QSEs are solely responsible to make the submission changes needed to implement the Protocol requirements described in this NPRR.
Reason: To address concerns raised at the December 8, 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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