NPRR #364 · Revision Request
NPRR364 Clarify Active and Inactive SCED Constraint Reporting
ReasonThis NPRR clarifies Protocol language as to what should be reported regarding transmission constraint information. Network Security Analysis (NSA) is the application used to activate different constraints for economic dispatch by SCED. A constraint consists of a contingency and a monitored Transmission Element paired together. Pursuant to Protocol requirements, the NSA results are currently provided on the Market Information System (MIS) Secure Area; however, the delineation of "active" versus "inactive" is not clear in the current Protocol language. As an example, an inactive constraint is not one in which ERCOT has determined to be inaccurate or inappropriate but rather one that is present in the Transmission Constraint Manager (TCM) that has not been selected for SCED resolution by ERCOT. This NPRR provides a firm delineation for active and inactive constraints, and separates the concept from contingencies that have been rendered ineligible due to being inaccurate or inappropriate. Such invalid contingencies, or contingencies identified by ERCOT as being incorrectly defined or otherwise in error, are already being posted to the MIS per Section per paragraph (6) of Section 5.5.1, Security Sequence.
Created2011-05-19
Approved2011-10-18
Sections Affected
6.5.7.1.11
Summary
This Nodal Protocol Revision Request (NPRR) clarifies the reporting requirements for Security-Constrained Economic Dispatch (SCED) constraints and aligns the Protocols with current practices.
Action Log 5 milestones
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May 19
PRSDeferred/Tabled→ PRS for consideration.
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Jul 21
PRSRecommended for Approval→ PRS for Impact Analysis review.
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Aug 18
PRSRecommended for Approval→ TAC for consideration.
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Sep 1
TACRecommended for Approval→ ERCOT Board for consideration.
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Oct 18
BOARDApproved
Amendments
| Date | Body | Motion | Result |
|---|---|---|---|
| Jul 21 '11 | PRS | To recommend approval of NPRR364 as amended by the 7/14/11 J Aron comments. | Passed |
Documents 14
| Name | Type | Posted | Classification |
|---|---|---|---|
| 364NPRR-01 Clarify Active and Inactive SCED Constraint Reporting | doc | May 4 '11 | Revision Request |
| 364NPRR-02 Impact Analysis 050411 | doc | May 4 '11 | Staff Report |
| 364NPRR-03 J Aron Comments 051011 | doc | May 10 '11 | Revision Request Comments |
| 364NPRR-04 Calpine Comments 051111 | doc | May 11 '11 | Revision Request Comments |
| 364NPRR-05 ERCOT Comments 051211 | doc | May 12 '11 | Revision Request Comments |
| 364NPRR-06 PRS Report 051911 | doc | May 24 '11 | Committee Report |
| 364NPRR-07 WMS Comments 062011 | doc | Jun 20 '11 | Revision Request Comments |
| 364NPRR-08 ERCOT Comments 062311 | doc | Jun 23 '11 | Revision Request Comments |
| 364NPRR-09 J Aron Comments 071411 | doc | Jul 14 '11 | Revision Request Comments |
| 364NPRR-10 WMS Comments 071811 | doc | Jul 18 '11 | Revision Request Comments |
| 364NPRR-11 PRS Report 072111 | doc | Aug 11 '11 | Committee Report |
| 364NPRR-12 PRS Report 081811 | doc | Aug 22 '11 | Committee Report |
| 364NPRR-13 TAC Report 090111 | doc | Sep 7 '11 | Committee Report |
| 364NPRR-14 Board Report 101811 | doc | Oct 20 '11 | Committee Report |
Meetings That Took It Up 9
| Date | Meeting | Committee | Status |
|---|---|---|---|
| Oct 18 '11 | Board of Directors Meeting | BOARD | Concluded |
| Sep 1 '11 | TAC Meeting | TAC | Concluded |
| Aug 18 '11 | PRS Meeting | PRS | Concluded |
| Aug 5 '11 | Joint CWG/MCWG Meeting | MCWG | Concluded |
| Jul 21 '11 | PRS Meeting | PRS | Concluded |
| Jul 13 '11 | WMS Meeting | WMS | Concluded |
| Jun 23 '11 | PRS Meeting | PRS | Concluded |
| Jun 15 '11 | WMS Meeting | WMS | Concluded |
| May 19 '11 | PRS Meeting | PRS | Concluded |