| NOGRR215 |
Limit Use of Remedial Action Schemes |
This Nodal Operating Guide Revision Request (NOGRR) will allow new Remedial Action Schemes (RASs) to be used only to address an actual or anticipated violation of transmission security criteria when market tools are insufficient to address those violations. This NOGRR also clarifies the procedures for retiring RASs. |
06/24/2020 |
ERCOT |
No |
8K, 11.1, 11.2, 11.2.1 |
Pending |
|
| NOGRR230 |
WAN Participant Security |
This Nodal Operating Guide Revision Request (NOGRR) ensures integrity of Wide Area Network (WAN) data transmission by adding a requirement to share data in a way that prevents Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks. |
08/11/2021 |
ERCOT |
No |
7.1.2 |
Pending |
|
| NOGRR245 |
Inverter-Based Resource (IBR) Ride-Through Requirements |
This Nodal Operating Guide Revision Request (NOGRR) replaces the current voltage ride-through requirements for Intermittent Renewable Resources (IRRs) with voltage ride-through requirements for Inverter-Based Resources (IBRs) and provides new frequency ride-through requirements for IBRs consistent with or beyond requirements identified in the new 2800-2022 - Institute of Electrical and Electronics Engineers (IEEE) Standard for Interconnection and Interoperability of Inverter-Based Resources (IBRs) Interconnecting with Associated Transmission Electric Power Systems (“IEEE 2800-2022 standard”). |
01/11/2023 |
ERCOT |
No |
2.6.2, 2.6.2.1, 2.9, 2.9.1 |
Pending |
|
| NOGRR246 |
Related to NPRR1161, Clarify AVR Notification Requirements for IRRs |
This Nodal Operating Guide Revision Request (NOGRR) clarifies that Intermittent Renewable Resources (IRRs), who remain synchronized to the ERCOT System but are not able to provide reactive power when not providing real power, do not have to notify ERCOT other than the Real-Time telemetered status. |
02/07/2023 |
ERCOT |
No |
2.2.5, 2.7.3.4 |
Pending |
|
| NOGRR247 |
Change UFLS Stages and Load Relief Amounts |
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). 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. |
02/15/2023 |
ERCOT |
No |
2.6.1 |
Pending |
|
| NOGRR248 |
Related to NPRR1157, Incorporation of PUCT Approval into Revision Request Process |
This Nodal Operating Guide Revision Request (NOGRR) requires all Revision Requests to be approved by the Public Utility Commission of Texas (PUCT) prior to implementation; standardizes all Revision Requests be considered by the ERCOT Board of Directors; adds an Independent Market Monitor (IMM) opinion, ERCOT opinion, and the ERCOT Market Impact Statement to the TAC Report; and revises possible actions on a Revision Request from “defer” to “table” as currently captured in motions. |
02/22/2023 |
ERCOT |
Yes |
1.3.1, 1.3.3.2, 1.3.3.3, 1.3.3.9, 1.3.3.10, 1.3.3.11 (new), 1.3.3.11, and 1.3.5 |
Pending |
|
| NOGRR249 |
Communication of System Operating Limit Exceedances |
This Nodal Operating Guide Revision Request (NOGRR) specifies the methods for Transmission Operators (TOs) to receive electronic communication of system operating limit exceedances from ERCOT. |
03/17/2023 |
ERCOT |
No |
3.7 |
Pending |
|
| NOGRR250 |
Related to NPRR 1171, Requirements for DGRs and DESRs on Circuits Subject to Load Shedding |
This Nodal Operating Guide Revision Request (NOGRR) removes language that prohibits Distribution Service Providers (DSPs) from connecting Distribution Generation Resources (DGRs) and Distribution Energy Storage Resources (DESRs) to circuits included in an Under-Frequency Load Shed (UFLS) scheme to align with NPRR1171. NPRR1171 recognizes that some DGRs and DESRs may be connected to circuits that are subject to Load shed. |
03/29/2023 |
ERCOT |
No |
2.6.1 |
Pending |
|