NPRR #351 · Revision Request
NPRR351 SCED Look-Ahead Step 1: Pricing: Calculate Non-Binding Prices and Basepoints for Initial Research into SCED Look-Ahead and allow Consumers to have a Forward Price Projection (formerly "Calculate and Post Projected Non-Binding LMPs for the Next 15 Minutes")
ReasonERCOT expects this NPRR will be the first step of a multi-phase implementation of SCED Look-Ahead, with the results of this NPRR primarily being used for research purposes to determine how to best calculate prices and base points for future periods. In addition, the ERCOT Steel Mills and at least one retailer have expressed a strong desire to use the results to make Real-Time decisions on how to consume power in Real-Time based on prices. Primarily, this will be used to determine the accuracy (and improve it, if possible) of the SCED Look-Ahead Real-Time Dispatch process. At issue will be whether the improved algorithm delivers better results than the current one. There are a number of areas to analyze, including: · The predictability of the wind generation over the next hour. · How near-term Load growth and generator Dispatch will create binding contingencies over the next hour. · What sort of uplift costs will be created by the process, if any, once it becomes binding.
Created2011-05-19
Approved2011-12-12
Rejected2011-06-23
Sections Affected
6.3.26.5.7.3
Summary
Using the inputs specified in this Nodal Protocol Revision Request (NPRR), ERCOT will calculate prices and base points over the next hour, using an hour-long optimization instead of a five-minute optimization. These calculated prices and base points will initially be non-binding, although it is anticipated that these will become binding as Security-Constrained Economic Dispatch (SCED) Look-Ahead progresses in future phases. Not covered by this NPRR are the larger pieces of SCED Look-Ahead, like Real-Time commitment of generators and Load Resources (possibly replacing or eliminating the Non-Spinning Reserve (Non-Spin) product), Real-Time co-optimization of energy and Ancillary Services (including determining when the co-optimization occurs), whether to charge make-whole charges and to whom they should be charged to, and how these revisions will support the overall market design and Resource adequacy requirements.
Timeline
- Apr 13 '11
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May 19 '11
PRS PRS MeetingPRSDeferred/Tabled Tabled“To table NPRR351 for one month.” — Passed→ PRS language consideration
- Jun 23 '11
- Jul 7 '11
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Aug 4 '11
TAC TAC MeetingTACRemanded Appeal Remanded → PRS“To grant the ERCOT Steel Mills appeal and remand NPRR351 to PRS; to direct PRS to work with ERCOT to resolve any questions needed to complete the Impact Analysis; to request that ERCOT perform an Impact Analysis; and to direct PRS to recommend action on NPRR351 to TAC after the completion of the Impact Analysis.” — Passed→ PRS consideration of NPRR351
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Aug 18 '11
PRS PRS MeetingPRSRecommended for Approval Recommended for approval Forwarded → PRS“To recommend approval of NPRR351 as revised by PRS for the sole purpose of ERCOT’s preparation of an Impact Analysis for PRS review.” — Passed→ PRS Impact Analysis review
- Sep 21 '11
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Sep 22 '11
PRS PRS MeetingPRSDeferred/Tabled Tabled Referred → WMS“To table NPRR351 for one month; to request that ERCOT prepare comments outlining the impacts associated with Option 2 (as defined in the 9/21/11 ERCOT comments) and provide examples; and to request that WMS review NPRR351 and provide input by the October 20, 2011 PRS meeting.” — Passed→ PRS Impact Analysis review
- Oct 11 '11
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Oct 12 '11
Listed without action at 1 meeting
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Oct 20 '11
PRS PRS MeetingPRS Urgent status“To grant NPRR351 Urgent status” — Failed→ PRS Impact Analysis review
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Nov 3 '11
TAC TAC MeetingTACRemanded Appeal Remanded → PRS Referred → WMS Referred → PRS“To grant the 10/20/11 ERCOT Steel Mills appeal and to remand NPRR351 to PRS as revised by TAC; to encourage WMS and PRS to continue discussions with ERCOT on the details of the SCED Look-Ahead project through workshops, special meetings, or other means; to instruct PRS to vote on either recommending approval or rejecting NPRR351 by the January 2012 PRS meeting and to report back to TAC; and to request that ERCOT provide more information to PRS at the 11/17/11 PRS meeting (or prior to the next TAC meeting if the PRS meeting is too soon) about its intentions on how to actually implement this NPRR in regards to wind forecasts, wind base points, ramp rates, State Estimator inputs, Dynamic Ratings, binding constraints, LDLs and HDLs, and the disclosure of forecasted base points to operators and the market.” — Passed→ PRS consideration of NPRR351
- 351NPRR-19 PRS Report 102011
- 351NPRR-20 PRS Voting Ballot 102011
- 351NPRR-21 PRS Voting Ballot 102011
- 351NPRR-22 ERCOT Steel Mills Appeal 102011
- 351NPRR-23 ERCOT Steel Mills Comments 102511
- 351NPRR-24 TIEC Comments 102711
- 351NPRR-25 Champion Energy Services Comments 110111
- 351NPRR-26 ERCOT Steel Mills Comments 110211
- 351NPRR-27 Reliant Energy Retail Services Comments 110211
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Nov 17 '11
PRS PRS MeetingPRSDeferred/Tabled Tabled“To table NPRR351 until the 11/29/11 Special PRS meeting.” — Passed→ PRS consideration of NPRR351
- Nov 28 '11
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Nov 29 '11
PRS Special PRS MeetingPRS priority 2012 · rank 100 Forwarded → TAC Amended by the Sep 20 '11 Trefny-Crockett comments“To recommend a priority of 2012 and rank of 100, to forward NPRR351 to TAC, and to endorse the Business Case as set forth in the 9/20/11 Trefny-Crockett comments.” — Passed→ TAC consideration of NPRR351
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Dec 1 '11
TAC TAC MeetingTACRecommended for Approval Recommended for approval“To recommend approval of NPRR351 as recommended by PRS in the 11/29/11 PRS Report.” — Passed→ ERCOT Board consideration of NPRR351
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Dec 12 '11
BOARD Board of Directors MeetingBOARDApproved Approved“To approve NPRR351 as recommended by TAC in the 12/1/11 TAC Report.” — Passed
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May 9 '12
Listed without action at 4 meetings (May 9 '12 – Nov 27 '12)