NPRR #576 · Revision Request
NPRR576 Changing Non-Spin Service to be Dispatched by ERCOT (formerly "Changing Non-Spin Service to an Off-Line Service")
ReasonCurrently Non-Spin can be provided by On-Line Generation Resources which are always available to Security-Constrained Economic Dispatch (SCED). This creates several issues both from a reliability and market perspective. It reduces reliability because it is being deployed before it is needed therefore no longer there when it is truly needed; and if Entities know this is coming in, they have less MWs in SCED, thus the total available response in system is lower at all times. From a market perspective On-Line Non-Spinning reserves create a non-linearity in prices, thus preventing true scarcity prices as the large amount of On-Line creates an artificial buffer in the supply stack.
Created2013-11-21
Approved2014-04-08
Sections Affected
2.13.8.33.17.36.4.3.26.5.7.56.5.7.6.2.38.1.1.2.1.38.1.1.3.38.1.1.4.3
Summary
This Nodal Protocol Revision Request (NPRR) continues to allow On-Line Non-Spin, but places it behind the High Ancillary Service Limit (HASL). This NPRR also proposes the reinstatement of a minimum offer floor for On-Line Non-Spin, but leaves the determination of its value (value of X) to TAC.
Timeline
- Oct 24 '13
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Nov 21 '13
PRS Protocol Revision Subcommittee (PRS) MeetingPRSDeferred/Tabled Tabled Referred → ROS Referred → WMS“To table NPRR576 and to refer issues to ROS and WMS.” — Passed→ PRS language consideration
- Dec 11 '13
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Dec 12 '13
Listed without action at 12 meetings (Dec 12 '13 – Mar 6 '14)
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Mar 18 '14
PRS PRS MeetingPRSRecommended for Approval Recommended for approval Amended by the Mar 18 '14 CPS Energy comments Forwarded → TAC“To recommend approval of NPRR576 as amended by the 3/18/14 CPS Energy comments and as revised by PRS, and to forward it to TAC; and requested that TAC assign a value to X.” — Passed→ TAC for consideration
- Mar 26 '14
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Mar 26 '14
Listed without action at 1 meeting
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Mar 27 '14
TAC TAC MeetingTACRecommended for Approval Recommended for approval Amended by the Mar 25 '14 CPS comments“To recommend approval of NPRR576 as recommended by PRS in the 3/18/14 PRS Report, as amended by the 3/25/14 CPS comments, and as revised by TAC with a recommendation of $75 per MWh as the minimum offer floor for On-Line Non-Spin.” — Passed→ ERCOT Board for consideration
- Apr 3 '14
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Apr 8 '14
BOARD Board of Directors MeetingBOARDApproved Recommended for approval“To approved NPRR576 as recommended by TAC in the 3/27/14 TAC Report.” — Passed
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Posted since the last meeting