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NOGRR247
Summary
| Title | Change UFLS Stages and Load Relief Amounts |
|---|---|
| Next Group | |
| Next Step | |
| Status | Approved on 10/12/2023 |
Action
| Date | Gov Body | Action Taken | Next steps |
|---|---|---|---|
| 10/12/2023 | PUCT | Approved | |
| 08/31/2023 | BOARD | Recommended for Approval | PUCT for consideration |
| 07/25/2023 | TAC | Recommended for Approval | Board for consideration |
| 07/06/2023 | ROS | Recommended for Approval | TAC for consideration |
| 06/08/2023 | ROS | Recommended for Approval | ROS for Impact Analysis for consideration |
| 03/02/2023 | ROS | Deferred/Tabled | ROS for consideration |
Voting Record
| Date | Gov Body | Motion | Result |
|---|---|---|---|
| 10/12/2023 | PUCT | To approve NOGRR247 and accompanying ERCOT Market Impact Statement as presented in Project No. 54445, Review of Rules Adopted by the Independent Organization | Passed |
| 08/31/2023 | BOARD | To recommend approval of NOGRR247 as recommended by TAC in the 7/25/23 TAC Report | Passed |
| 07/25/2023 | TAC | To recommend approval of NOGRR247 as recommended by ROS in the 7/6/23 ROS Report | Passed |
| 07/06/2023 | ROS | To endorse and forward to TAC the 6/8/23 ROS Report and 2/15/23 Impact Analysis for NOGRR247 | Passed |
| 06/08/2023 | ROS | To recommend approval of NOGRR247 as amended by the 4/27/23 CenterPoint Energy comments. | Passed |
| 03/02/2023 | ROS | To table NOGRR247 and refer the issue to the Dynamics Working Group (DWG), Operations Working Group (OWG), Performance, Disturbance, Compliance Working Group (PDCWG), and System Protection Working Group (SPWG) | Passed |
Background
| Status: | Approved |
|---|---|
| Date Posted: | Feb 15, 2023 |
| Sponsor: | ERCOT |
| Urgent: | No |
| Sections: | 2.6.1 |
| Description: | This Nodal Operating Guide Revision Request (NOGRR) modifies the ERCOT automatic Under-Frequency Load Shed (UFLS) program by increasing the number of Load shed stages from three to five and changing the Transmission Operator (TO) Load relief amounts to uniformly increment by 5% for each stage. The NOGRR also adds a UFLS minimum time delay of six cycles (0.1 seconds), and adds 59.1 Hz to the list of UFLS stages in paragraph (3) of Section 2.6.1. Additionally, this NOGRR revises the grey-box language from NOGRR226 in Section 2.6.1 to provide that the TO Load value used to determine the TO Load at each frequency threshold in Table 1 will be the value of TO Load at the time frequency reaches 59.5 Hz, rather than the value of TO Load at the time of reaching each successive frequency threshold, consistent with the current method for determining TO Load in Table 1, and proposes an effective date of October 1, 2026 for both NOGRR226 and NOGRR247. |
| Reason: | Addresses current operational issues |
Key Documents
Feb 15, 2023 - docx - 45 KB
Feb 15, 2023 - docx - 31.5 KB
Mar 3, 2023 - xls - 137.5 KB
Mar 3, 2023 - docx - 48.2 KB
Apr 25, 2023 - docx - 36.2 KB
Apr 27, 2023 - docx - 36.2 KB
Jun 9, 2023 - xls - 137.5 KB
Jun 9, 2023 - docx - 51.7 KB
Jul 7, 2023 - xls - 137.5 KB
Jul 7, 2023 - docx - 52.3 KB
Jul 27, 2023 - xls - 98.5 KB
Jul 27, 2023 - docx - 53.7 KB
Sep 1, 2023 - docx - 53.6 KB
Oct 13, 2023 - docx - 53.8 KB