Title: Alignment of PRC Calculation
Next Group:
Next Step:
Status: Approved on 02/11/2014
Effective Dates:


Date Gov Body Action Taken Next Steps
02/11/2014 BOARD Approved
01/28/2014 TAC Recommended for Approval ERCOT Board consideration of NPRR573
12/19/2013 PRS Recommended for Approval TAC consideration of NPRR573
11/21/2013 PRS Recommended for Approval PRS Impact Analysis review

Voting Record

Date Gov Body Motion Result
02/11/2014 BOARD Passed
01/28/2014 TAC To recommend approval of NPRR573 as recommended by PRS in the 12/19/13 PRS Report. Passed
12/19/2013 PRS To endorse and forward the 11/21/13 PRS Report and Impact Analysis for NPRR573 to TAC with a recommended priority of 2014 and rank of 1050. Passed
11/21/2013 PRS To recommend approval of NPRR573 as amended by the 11/5/13 PDCWG comments. 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: Oct 21, 2013
Sponsor: ERCOT
Urgent: No
Description: This Nodal Protocol Revision Request (NPRR) aligns the Protocols with the current calculation used in the Energy Management System (EMS) to calculate Physical Responsive Capability (PRC), and adds capacity from Primary Frequency Response-capable Wind-powered Generation Resources (WGRs) to PRC.
Reason: This NPRR is aligns the Protocol language with the current PRC calculation in the EMS, and modifies the PRC calculation to represent appropriate frequency-responsive WGRs. The original Nodal Market design documents required any capacity from WGRs and nuclear Generation Resources above their current output level to be excluded from the calculation of PRC in the EMS. NPRR076, Synchronization of Emergency Electric Curtailment Plan (EECP) Event Realignment, modified Section to add an equation for the calculation of PRC. The equation that was added to the Protocols as a result of NPRR076 did not exclude unloaded WGR and nuclear Generation Resource capacity. However, no change was made to the EMS design calculation of PRC as a result of NPRR076. Therefore, this NPRR excludes WGRs and nuclear Generation Resources from the PRC calculation, with the exception of Primary Frequency Response-capable WGRs.

Key Documents

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