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NPRR576

Summary

Title Changing Non-Spin Service to be Dispatched by ERCOT (formerly "Changing Non-Spin Service to an Off-Line Service")
Next Group
Next Step
Status Approved on 04/08/2014
Effective Dates
06/01/2014

Action

Date Gov Body Action Taken Next Steps
04/08/2014 BOARD Approved
03/27/2014 TAC Recommended for Approval ERCOT Board for consideration
03/18/2014 PRS Recommended for Approval TAC for consideration
11/21/2013 PRS Deferred/Tabled PRS language consideration

Voting Record

Date Gov Body Motion Result
04/08/2014 BOARD To approved NPRR576 as recommended by TAC in the 3/27/14 TAC Report. Passed
03/27/2014 TAC 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
03/18/2014 PRS 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
11/21/2013 PRS To table NPRR576 and to refer issues to ROS and WMS. Passed

Background

Status: Approved
Date Posted: Oct 24, 2013
Sponsor: GDF Suez NA Inc.
Urgent: Yes
Sections: 2.1, 3.8.3, 3.17.3, 6.4.3.2, 6.5.7.5, 6.5.7.6.2.3, 8.1.1.2.1.3, 8.1.1.3.3, 8.1.1.4.3
Description: 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.
Reason: Currently 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.

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