Title Clarify Inputs to PRC and ORDC
Next Group
Next Step
Status Approved on 04/08/2014
Effective Dates


Date Gov Body Action Taken Next steps
04/08/2014 BOARD Approved
02/27/2014 TAC Recommended for Approval ERCOT Board for consideration
02/13/2014 PRS Recommended for Approval TAC for consideration

Voting Record

Date Gov Body Motion Result
04/08/2014 BOARD To approved NPRR598 as amended by the 3/28/14 TAC comments. Passed
02/27/2014 TAC To recommend approval of NPRR598 as recommended by PRS in the 2/13/14 PRS Report and as amended by the 2/25/14 ERCOT comments; to recommend approval of the "Methodology for Implementing Operating Reserve Demand Curve (ORDC) to Calculate Real-Time Reserve Price Adder" as amended by the 2/25/14 ERCOT comments - Attachment 1; and to add the methodology to the Other Binding Document List. Passed
02/13/2014 PRS To recommend approval of NPRR598 as submitted and to forward it and the Impact Analysis to TAC. Passed


Status: Approved
Date Posted: Feb 12, 2014
Sponsor: ERCOT
Urgent: Yes
Sections:,, 6.7.4
Description: This Nodal Protocol Revision Request (NPRR) aligns the inputs to Physical Responsive Capability (PRC) and ORDC; stipulates the treatment of Off-Line capacity during scarcity conditions; and also proposes the following changes: · Removes STARTUP and SHUTDOWN status from PRC and ORDC calculations; · Sets Real-Time Off-Line available reserves used in the ORDC calculation to zero when SCED snapshot of the PRC becomes less than or equal to 2,300 MW which is the PRC MW at which Energy Emergency Alert (EEA) Level 1 is initiated; and · Changes the Load Resource Responsive Reserve (RRS) schedule used in ORDC to Max { min{Telemetered MW, RRS schedule, max[MPC - LPC - (Regulation responsibility + Non-Spin responsibility + Down Regulation responsibility), 0]}, 0}
Reason: Market efficiencies or enhancements

Key Documents

Related Content