Title: SCED Base Point, Base Point Deviation, and Performance Evaluation Changes for IRRs that Carry Ancillary Services
Next Group:
Next Step:
Status: Approved on 12/11/2018


Date Gov Body Action Taken Next Steps
12/11/2018 BOARD Approved
11/29/2018 TAC Recommended for Approval Board for consideration
10/18/2018 PRS Recommended for Approval TAC for consideration
09/13/2018 PRS Recommended for Approval PRS for Impact Analysis review
06/14/2018 PRS Deferred/Tabled Language Consideration

Voting Record

Date Gov Body Motion Result
12/11/2018 BOARD To approve NPRR879 as recommended by TAC in the 11/29/18 TAC Report Passed
11/29/2018 TAC To recommend approval of NPRR879 as recommended by PRS in the 10/18/18 PRS Report Passed
10/18/2018 PRS To endorse and forward to TAC the 9/13/18 PRS Report as amended by the 9/25/18 ERCOT comments and the Revised Impact Analysis for NPRR879 with a recommended priority of 2020 and rank of 2800 Passed
09/13/2018 PRS To recommend approval of NPRR879 as amended by the 8/3/18 ERCOT comments as revised by PRS Passed
06/14/2018 PRS To table NPRR879 and refer the issue to WMS and ROS. 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: May 30, 2018
Sponsor: ERCOT
Urgent: No
Sections:,,,,,, and
Description: This Nodal Protocol Revision Request (NPRR) proposes that Intermittent Renewable Resources (IRRs) carrying Ancillary Service Resource Responsibilities receive a Security-Constrained Economic Dispatch (SCED) Base Point calculated using the five-minute intra-hour forecast of the Resource. Generation Resource Energy Deployment Performance (GREDP) metrics are added to score performance during these intervals. Base Point Deviation Charges are adjusted to treat IRRs providing Ancillary Services the same as conventional generators. These changes cannot be done manually and will be active once a system change is implemented. This NPRR contains clean-up changes to correct the unit of measure for some billing determinants, and an as-built correction to the Settlement equation in paragraph (4) of Section These clean-up changes do not introduce any system impact or Settlement changes. This NPRR also contains administrative edits to paragraphs (7) - (9) of Section, to align the paragraph numbering with current Protocol formatting style. These edits are authored as “ERCOT Market Rules” in this NPRR.
Reason: Addresses current operational issues

Key Documents

Related Content