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NPRR911

Summary

Title Improved Calculation of Real-Time LMPs at Logical Resource Nodes for On-Line Combined Cycle Generation Resources
Next Group
Next Step
Status Approved on 02/12/2019
Effective Dates
12/13/2019

Action

Date Gov Body Action Taken Next Steps
02/12/2019 BOARD Approved
01/30/2019 TAC Recommended for Approval Board for consideration
01/17/2019 PRS Recommended for Approval TAC for consideration
12/13/2018 PRS Recommended for Approval PRS for Impact Analysis review

Voting Record

Date Gov Body Motion Result
02/12/2019 BOARD To approve NPRR911 as recommended by TAC in the 1/30/19 TAC Report Passed
01/30/2019 TAC To recommend approval of NPRR911 as recommended by PRS in the 1/17/19 PRS Report Passed
01/17/2019 PRS To endorse and forward to TAC the 12/13/18 PRS Report and Impact Analysis for NPRR911 with a recommended priority of 2019 and rank of 2660 Passed
12/13/2018 PRS To recommend approval of NPRR911 as submitted Passed

Background

Status: Approved
Date Posted: Nov 28, 2018
Sponsor: ERCOT
Urgent: No
Sections: 6.6.1.1
Description: This Nodal Protocol Revision Request (NPRR) follows NPRR890, Correction to Calculation of Real-Time LMPs at Logical Resource Node for On-Line Combined Cycle Generation Resources. The intent of NPRR890 was to align Protocol language with ERCOT’s systems. The current Protocol language calculates the Locational Marginal Price (LMP) for a Combined Cycle Generation Resource (“CCGR”) using a weighted average of the Shift Factors for each Generation Resource in the On-Line CCGR using the Real-Time telemetered outputs of the Generation Resources to calculate the weight factor. This language reverts the applicable Protocol sections back to previous language for determining Real-Time LMPs of the logical Resource Nodes for On-Line CCGRs. Reverting the Protocol language back results in those CCGR LMPs being based on a weighted average of LMPs at the Resource Node for each of the Generation Resources in the On-Line CCGRs, using the Real-Time telemetered outputs of the Generation Resources to calculate the weight factor. This NPRR also retains the language from NPRR890 that clarifies the formula for Off-Line CCGRs.
Reason: Market efficiencies or enhancements

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