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NPRR364
Summary
| Title | Clarify Active and Inactive SCED Constraint Reporting |
|---|---|
| Next Group | |
| Next Step | |
| Status | Approved on 10/18/2011 |
| Effective Dates |
11/01/2011
|
Action
| Date | Gov Body | Action Taken | Next steps |
|---|---|---|---|
| 10/18/2011 | BOARD | Approved | |
| 09/01/2011 | TAC | Recommended for Approval | ERCOT Board for consideration. |
| 08/18/2011 | PRS | Recommended for Approval | TAC for consideration. |
| 07/21/2011 | PRS | Recommended for Approval | PRS for Impact Analysis review. |
| 05/19/2011 | PRS | Deferred/Tabled | PRS for consideration. |
Voting Record
| Date | Gov Body | Motion | Result |
|---|---|---|---|
| 10/18/2011 | BOARD | To approve NPRR364 as recommended by TAC in the 9/1/11 TAC Report. | Passed |
| 09/01/2011 | TAC | To recommend approval of NPRR364 as recommended by PRS in the 8/18/11 PRS Report. | Passed |
| 08/18/2011 | PRS | To endorse and forward the 7/21/11 PRS Report and Impact Analysis for NPRR364 to TAC. | Passed |
| 07/21/2011 | PRS | To recommend approval of NPRR364 as amended by the 7/14/11 J Aron comments. | Passed |
| 05/19/2011 | PRS | To to table NPRR364. | Passed |
Background
| Status: | Approved |
|---|---|
| Date Posted: | May 4, 2011 |
| Sponsor: | ERCOT |
| Urgent: | No |
| Sections: | 6.5.7.1.11 |
| Description: | This Nodal Protocol Revision Request (NPRR) clarifies the reporting requirements for Security-Constrained Economic Dispatch (SCED) constraints and aligns the Protocols with current practices. |
| Reason: | This 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. |
Key Documents
May 4, 2011 - doc - 78 KB
May 4, 2011 - doc - 54.5 KB
May 10, 2011 - doc - 51 KB
May 11, 2011 - doc - 38 KB
May 12, 2011 - doc - 53.5 KB
May 24, 2011 - doc - 86.5 KB
Jun 20, 2011 - doc - 48 KB
Jun 23, 2011 - doc - 57 KB
Jul 14, 2011 - doc - 52 KB
Jul 18, 2011 - doc - 48.5 KB
Aug 11, 2011 - doc - 92 KB
Aug 22, 2011 - doc - 93 KB
Sep 7, 2011 - doc - 95.5 KB
Oct 20, 2011 - doc - 97 KB