NSA Active and Inactive Constraints Reports Post-NPRR 951 Updates
"Explore the updates made to the Network Security Analysis reports post-NPRR 951 implementation, including proposed changes and solutions for better clarity and accuracy in data communication."
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Presentation Transcript
Congestion Management Working Group APRIL 7, 2021
NSA Active and NSA Inactive Constraints Reports, Post-NPRR 951 Implementation As a follow-up to the CMWG discussion in December, ERCOT discussed the changes that could be made to the Network Security Analysis (NSA) reports Background: NPRR951 added MVA ratings and flows to the NSA Active and Inactive Constraints reports The reports were updated during the system release on August 7 Market Notice M-A072820-1 NPRR, issued July 28 The new values reflect the desired ask in NPRR951, but there is some ambiguity in these, and other, values, which could be cleaned up
NSA Active and NSA Inactive Constraints Reports, Post-NPRR 951 Implementation Potential Issues: The SCED Rating in MW takes two things into account simultaneously MVA -> MW data conversion System Operator discount to the ratings being sent to SCED What can t be seen is how much of the enforced MW limit is due to each of these items individually. The Percent Violation column doesn t specify what value that column is calculating The column headings in the report do not clearly communicate the data contained within those columns Proposed Changes: 1) Adding a Percent Violation column heading (adding %) 2) Splitting the SCED rating and MW column, which is a combination of the MW and the discount factor ERCOT operators apply
NSA Active and NSA Inactive Constraints Reports, Post-NPRR 951 Implementation Proposed Solution: o ERCOT can submit an internal Request for Change (RFC) to make the two proposed changes o WMS action is not required
Next Meeting: April 19 o NPRR 1063, Dynamic Rating Transparency o ETT CREZ Outages o TAC Action Item Assignment
