Frame

Meeting Summary - 04/03/2025 ROS Meeting

Grid Monitor AI
04/03/2025

<div class="news-image-container"><img src="/storage/docs/2025/04/20250403ROSHero.png" /></div> <h3><a href="/sharing/?token=283f38a0-145b-4b12-8ca7-3e402d18d656">▶️</a>1 - Antitrust Admonition</h3> <h3><a href="/sharing/?token=657f41cc-98c0-4f34-b73c-3a8bfb4efde2">▶️</a>2 - Agenda Review</h3> <h3><a href="/sharing/?token=3e6359f4-576a-4226-bcc1-54df18e6c0f3">▶️</a>3 - Approval of ROS Meeting Minutes (Possible Vote)</h3> <h4><a href="/sharing/?token=d63d8a23-01a9-41b9-98b4-bd0c7219c70b">▶️</a>3.1 - March 6, 2025</h4> <ul> <li style="font-weight: 400;" aria-level="1">Motion to approve March 6, 2025 meeting minutes added to the combo ballot.</li> </ul> <h3><a href="/sharing/?token=84f173cc-960b-41b1-8e41-e42c71190e55">▶️</a>4 - Technical Advisory Committee (TAC) Update</h3> <ul> <li style="font-weight: 400;" aria-level="1">Approval of Real Time Cooptimization NPRRs</li> <ul> <li style="font-weight: 400;" aria-level="2">NPRR1268 was approved with IMM's comments.</li> <li style="font-weight: 400;" aria-level="2">NPRR1269 was approved with TCPA comments.</li> <li style="font-weight: 400;" aria-level="2">NPRR1270 was approved as filed.</li> </ul> <li style="font-weight: 400;" aria-level="1">Voting Items Approval</li> <ul> <li style="font-weight: 400;" aria-level="2">NOGGR274 related to eliminating the VDI approved.</li> <li style="font-weight: 400;" aria-level="2">PGRR115 related to NPRR1234 with large load interconnection approved after significant discussion on interconnection load limit timing, set to mid-April, and concerns about isolating colocated load.</li> <li style="font-weight: 400;" aria-level="2">PGRR119 related to stability constraint modeling assumptions approved.</li> </ul> <li style="font-weight: 400;" aria-level="1">MDRPOC Change Discussions</li> <ul> <li style="font-weight: 400;" aria-level="2">Discussions moved to WMS for alternative proposal development.</li> <li style="font-weight: 400;" aria-level="2">Encouragement to attend next WMS meeting for those interested.</li> </ul> </ul> <h3><a href="/sharing/?token=ac2dcf76-92ce-48ec-93d6-53159d6806fe">▶️</a>5 - ROS Goals/Strategic Objectives (Possible Vote)</h3> <a href="/storage/docs/2025/04/05.-2025-ROS-Goals.pdf">05.-2025-ROS-Goals.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">Motion to approve the 2025 ROS strategic objectives as presented added to the combo ballot.</li> <ul> <li style="font-weight: 400;" aria-level="2">Goals and objectives have been condensed, much of the original wording retained.</li> <li style="font-weight: 400;" aria-level="2">No comments or questions from members, suggesting consensus on the proposed document.</li> <li style="font-weight: 400;" aria-level="2">Intent to minimize the frequency of revisions, aiming for stability and longevity of the document.</li> </ul> </ul> <h3><a href="/sharing/?token=bcdd3f35-89f3-4aad-9c60-3f109987747f">▶️</a>6 - ERCOT Reports - 9:45 a.m.</h3> <h4><a href="/sharing/?token=f66106cf-8969-4ba2-81ae-6b166b52b118">▶️</a>6.1 - Operations Report</h4> <a href="/storage/docs/2025/04/February-2025-ERCOT-Operations-Report-Public.pdf">February-2025-ERCOT-Operations-Report-Public.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">Peak demand in February was 80,525 MW, occurring on February 20.</li> <li style="font-weight: 400;" aria-level="1">Six frequency events were all due to unit trips; frequency was restored in a few minutes.</li> <li style="font-weight: 400;" aria-level="1">No ECRS or RRS events were reported.</li> <li style="font-weight: 400;" aria-level="1">One OCN and three advisories issued, with advisories related to extreme cold weather or TSAT unavailability.</li> <li style="font-weight: 400;" aria-level="1">One watch was issued for extreme cold weather.</li> <li style="font-weight: 400;" aria-level="1">Record solar megawatt penetration occurred on February 28.</li> <li style="font-weight: 400;" aria-level="1">105 RUC commitments and several congestion events via GTCs were noted.</li> <li style="font-weight: 400;" aria-level="1">Discussion about improving visibility on RUC reasons concerning GTC congestion, anticipated to be addressed in future WMS meetings.</li> <li style="font-weight: 400;" aria-level="1">Possibility discussed of including large load trip performance and its impact on frequency in future operations reports.</li> </ul> <h4><a href="/sharing/?token=658f9aa7-62e1-4330-8c24-34fd360682b4">▶️</a>6.2 - System Planning Report</h4> <a href="/storage/docs/2025/04/SystemPlanningROS_Feb2025.pdf">SystemPlanningROS_Feb2025.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">No additional highlights were reported for this month's system planning report.</li> <li style="font-weight: 400;" aria-level="1">No questions were raised by the attendees.</li> </ul> <h4><a href="/sharing/?token=c2ef20d2-aa0c-40c2-a28a-5f13ca7b309c">▶️</a>6.3 - Generic Transmission Constraint (GTC) Update</h4> <a href="/storage/docs/2025/04/06.-GTCUpdate_ROS_April2025.pdf">06.-GTCUpdate_ROS_April2025.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">Two GTC updates discussed: Kinney GTC and Panhandle GTC.</li> <li style="font-weight: 400;" aria-level="1">Kinney GTC update: Based on 2025 Q1 QSA study. Minor changes; interface unchanged and no stability constraint for no product conditions.</li> <li style="font-weight: 400;" aria-level="1">Updates to GTC limits for priority conditions; minor overall update.</li> <li style="font-weight: 400;" aria-level="1">Kinney GTC update effective 04/02/2025.</li> <li style="font-weight: 400;" aria-level="1">Updated GTC methodology document available on MIS.</li> <li style="font-weight: 400;" aria-level="1">Panhandle GTC update: Based on study with additional generation resources in and near the Panhandle.</li> <li style="font-weight: 400;" aria-level="1">Interface definition update to align with topology changes. Cutting stations on interface lines require updates.</li> <li style="font-weight: 400;" aria-level="1">Overall GTC limit increase for outage and no problem conditions.</li> <li style="font-weight: 400;" aria-level="1">Discussion with Jackson Guo about the contradiction between increased GTC limits and voltage stability issues suggested in a previous study.</li> <li style="font-weight: 400;" aria-level="1">Explanation provided: Additional generation, including batteries, in the Panhandle and nearby areas provide reactive power support, allowing GTC limit increase.</li> <li style="font-weight: 400;" aria-level="1">Questions and further clarifications addressed about GTC updates.</li> </ul> <h3><a href="/sharing/?token=eb240368-4c0b-431b-a0ab-9d38acf8c9e4">▶️</a>7 - New Protocol Revision Subcommittee (PRS) Referrals (Vote)</h3> <h4><a href="/sharing/?token=8d45e37f-c780-4fc2-baed-d062d67bb0fc">▶️</a>7.1 - NPRR1272, Voltage Support at Private Use Networks</h4> <ul> <li style="font-weight: 400;" aria-level="1">Motion to request PRS continue to table NPRR1272 for further review by PLWG and VPWG added to the combo ballot.</li> <ul> <li style="font-weight: 400;" aria-level="2">NPRR1272 was voluntarily taken up and referred to the PLWG and Voltage Profile Working Group.</li> <li style="font-weight: 400;" aria-level="2">Both groups have reviewed it and requested more time; further discussion may occur at the May ROS meeting.</li> <li style="font-weight: 400;" aria-level="2">No immediate actions required beyond maintaining the topic as tabled until further notice.</li> <li style="font-weight: 400;" aria-level="2">Erin Wasik-Gutierrez from ERCOT Market Rules suggests submitting comments to request PRS continue to table the item, for formal referral to PLWG and VPWG.</li> <li style="font-weight: 400;" aria-level="2">Clarification was made that for NPRR1272, there was no need for a separate ballot as initially considered.</li> <li style="font-weight: 400;" aria-level="2">The group acknowledges the item is still under PRS's purview, and they would recommend further action as discussions continue within working groups.</li> </ul> </ul> <h4><a href="/sharing/?token=39edea6e-1344-4e5c-a3c3-0d816f61e02c">▶️</a>7.2 - NPRR1274, RPG Estimated Capital Cost Thresholds of Proposed Transmission Projects</h4> <ul> <li style="font-weight: 400;" aria-level="1">Motion to request PRS continue to table NPRR1274 for further review by PLWG added to the combo ballot.</li> <ul> <li style="font-weight: 400;" aria-level="2">NPRR1274 is new and aims to adjust capital cost thresholds for RPG project submissions.</li> <li style="font-weight: 400;" aria-level="2">ERCOT proposes a 35% increase in capital cost based on inflationary data.</li> <li style="font-weight: 400;" aria-level="2">A few sections in the documentation have been updated to include these changes.</li> <li style="font-weight: 400;" aria-level="2">In 2025, four projects would have been recategorized from Tier 1 to Tier 3.</li> <li style="font-weight: 400;" aria-level="2">No adjustments were noted for Tier 2 projects, while some Tier 3 projects would move to Tier 4.</li> <li style="font-weight: 400;" aria-level="2">Further historical data would require additional time to compile.</li> <li style="font-weight: 400;" aria-level="2">The change applies to projects submitted after the new threshold's effective date; projects under evaluation will retain their current classification.</li> <li style="font-weight: 400;" aria-level="2">The last cost threshold adjustment was in June 2018.</li> <li style="font-weight: 400;" aria-level="2">The proposal will be tabled and referred to PLWG for further review.</li> </ul> </ul> <h3><a href="/sharing/?token=f1f5b8e0-f6e2-4dd0-b889-10d853e0619d">▶️</a>8 - NPRR1278, Establishing Advanced Grid Support Service as an Ancillary Service (Waive Notice - Possible Vote)</h3> <ul> <li style="font-weight: 400;" aria-level="1">NPRR1278 proposal aims to create an advanced grid support service as an ancillary service, inspired by how Black Start works.</li> <li style="font-weight: 400;" aria-level="1">The service will provide yearly contracts to enhance ERCOT's reliability requirements, particularly involving energy storage and IBRs.</li> <li style="font-weight: 400;" aria-level="1">Key aspects include allowing various IBRs to participate and offering a dynamic ancillary service that can evolve with the grid's needs.</li> <li style="font-weight: 400;" aria-level="1">Discussion on whether the proposal should be an ancillary service or a standard.</li> <li style="font-weight: 400;" aria-level="1">No current position from the PUC on the matter was noted.</li> <li style="font-weight: 400;" aria-level="1">Concerns raised on the compensation for conventional generators versus IBRs providing similar services.</li> <li style="font-weight: 400;" aria-level="1">The proposal requires further clarification on the technical and cost implications, with some suggesting it might incur a cost.</li> <li style="font-weight: 400;" aria-level="1">Potential referral to working groups like OWG and PDCWG for deeper technical discussions.</li> </ul> <h3><a href="/sharing/?token=982df024-b5ce-4588-8ff0-2569a3e084d7">▶️</a>9 - ROS Revision Requests (Vote) - 10:30 a.m.</h3> <h4><a href="/sharing/?token=85cce00f-f2b5-4374-9894-ebc6e739117a">▶️</a>9.1 - NOGRR265, Related to NPRR1238, Voluntary Registration of Loads with Curtailable Load Capabilities</h4> <ul> <li style="font-weight: 400;" aria-level="1">NOGRR265 discussion was deferred until May.</li> <li style="font-weight: 400;" aria-level="1">No action required at the current meeting.</li> </ul> <h4><a href="/sharing/?token=0223b035-2eff-4edf-bbaf-0b46e2481bd4">▶️</a>9.2 - NOGRR275, Eliminate Scheduling Center Requirements for QSEs That Are Not WAN Participants</h4> <ul> <li style="font-weight: 400;" aria-level="1">Motion to recommend approval of NOGRR275 as revised by ROS added to the combo ballot.</li> <ul> <li style="font-weight: 400;" aria-level="2">Katherine Gross mentioned that NOGRR275 is updating the operating guide, aligning with protocol language approved last year in NPRR1206.</li> <li style="font-weight: 400;" aria-level="2">This change is to incorporate missed edits from NPRR1206 and align the operating guide with current protocol language.</li> <li style="font-weight: 400;" aria-level="2">Ted Hailu clarified the noncontroversial nature of changes, ensuring alignment with protocols and elimination of a reference in the operating guide regarding scheduling centers.</li> <li style="font-weight: 400;" aria-level="2">Kristin Cook from Southern Power expressed support for the changes, noting advantages for non-WAN participant QSEs.</li> <li style="font-weight: 400;" aria-level="2">A minor red line edit was suggested by Kristin Cook to add further clarification to the control or operation center responsibilities.</li> <li style="font-weight: 400;" aria-level="2">The suggested edit was accepted, and the decision was made to include this change in the combo ballot with the desktop edit noted.</li> </ul> </ul> <h3><a href="/sharing/?token=662a9a63-84d5-411f-90c7-22db61ec7c85">▶️</a>10 - Revision Requests Tabled at ROS (Possible Vote)</h3> <ul> <li style="font-weight: 400;" aria-level="1">Discussion on revision requests that have been tabled.</li> <li style="font-weight: 400;" aria-level="1">NPRR1264 is currently at PRS, with Eric Goff looking into an IA for it.</li> <li style="font-weight: 400;" aria-level="1">ERCOT staff posed questions and received some responses from Constellation.</li> <li style="font-weight: 400;" aria-level="1">Consensus to allow the processes to continue in other subcommittees before revisiting.</li> </ul> <h4>10.1 - 10.4</h4> <ul> <li style="font-weight: 400;" aria-level="1">Not discussed</li> </ul> <h4><a href="/sharing/?token=80976132-e1c9-43a8-bc18-370ad2107c86">▶️</a>10.5 - NOGRR272, Advanced Grid Support Requirements for Inverter-Based ESRs & PGRR121, Related to NOGRR272, Advanced Grid Support Requirements for Inverter-Based ESRs</h4> <ul> <li style="font-weight: 400;" aria-level="1">NOGRR272 and PGRR121 were discussed together with NOGRR278.</li> <li style="font-weight: 400;" aria-level="1">Discussion paused to address if there were any additional points on NOGRR272 and PGRR121.</li> <li style="font-weight: 400;" aria-level="1">No further points were raised during this part of the meeting.</li> </ul> <h3><a href="/sharing/?token=330039a0-8a35-4ff2-885c-3e3a64080611">▶️</a>11 - NPRR1264, Creation of a New Energy Attribute Certificate Program (Possible Vote)</h3> <ul> <li style="font-weight: 400;" aria-level="1">It was noted that the NPRR1264 will be observed as it progresses through PRS.</li> <li style="font-weight: 400;" aria-level="1">Emphasis on initiating working group updates following NPRR1264 discussion.</li> </ul> <h3><a href="/sharing/?token=c69000bf-2a07-415b-a63a-d18c42fee0c4">▶️</a>12 - Operations Working Group (OWG)</h3> <a href="/storage/docs/2025/04/OWG_ROS_20250403.pdf">OWG_ROS_20250403.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">Noted to take up NPRR1278 at the next meeting.</li> </ul> <h4><a href="/sharing/?token=e8914a72-cbf2-4f32-8de7-08123326895d">▶️</a>12.1 - NPRR1070, Planning Criteria for GTC Exit Solutions (OWG, PLWG) (Possible Vote)</h4> <ul> <li style="font-weight: 400;" aria-level="1">ERCOT is still working on the rewrite of NPRR1070; the item is tabled at the OWG, but an update is expected soon.</li> <li style="font-weight: 400;" aria-level="1">The 2025 UFLS survey indicates that the number of load set stages will increase from three to five.</li> <li style="font-weight: 400;" aria-level="1">Twenty-five percent of the system load must be equipped with the UFLS.</li> <li style="font-weight: 400;" aria-level="1">Further details can be found in the presentation on the OWG March 20 meeting page.</li> <li style="font-weight: 400;" aria-level="1">There were no additional businesses discussed.</li> <li style="font-weight: 400;" aria-level="1">Joint commenters are working on NPRR1270.</li> </ul> <h3><a href="/sharing/?token=c7cd3dee-cf5c-4cd8-8d8c-1740b8ffa177">▶️</a>13 - Network Data Support Working Group (NDSWG)</h3> <a href="/storage/docs/2025/04/NDSWG-report-to-ROS-20250403x.pdf">NDSWG-report-to-ROS-20250403x.pdf</a> <h4><a href="/sharing/?token=88d44e18-3d83-4e63-9398-bae4363765a9">▶️</a>13.1 - NPRR1265, Unregistered Distributed Generator (NDSWG) (Possible Vote)</h4> <ul> <li style="font-weight: 400;" aria-level="1">A meeting took place on 03/18, but not all SMEs were able to attend.</li> <li style="font-weight: 400;" aria-level="1">Further discussion is needed due to the absence of key personnel at the initial meeting.</li> <li style="font-weight: 400;" aria-level="1">Important topics to address include the potential additional burden on TSPs regarding information related to unregistered distributed generation.</li> <li style="font-weight: 400;" aria-level="1">There is concern about the consequences if DSPs fail to provide necessary information.</li> <li style="font-weight: 400;" aria-level="1">Ensuring the quality and integrity of data post-initial information dissemination is a significant issue.</li> <li style="font-weight: 400;" aria-level="1">Requirements for updates on the data need clarification.</li> </ul> <h4><a href="/sharing/?token=1c0cede9-ac43-46cb-b67c-c51401a20e7a">▶️</a>13.2 - SCR831, Short Circuit Model Integration (NDSWG, SPWG, SSWG) (Possible Vote)</h4> <ul> <li style="font-weight: 400;" aria-level="1">SCR831 was discussed focusing on short circuit parameters integration into the operations model.</li> <li style="font-weight: 400;" aria-level="1">ERCOT provided a presentation on SCR831, which was helpful and seen for the first time by the members.</li> <li style="font-weight: 400;" aria-level="1">There is a need for further discussion on the potential additional burdens on the TSP.</li> <li style="font-weight: 400;" aria-level="1">Need for synchronization between operations and planning models and its impact on the SIM upload of operations models was discussed.</li> <li style="font-weight: 400;" aria-level="1">The issue will be revisited in the next NDSWG meeting.</li> <li style="font-weight: 400;" aria-level="1">ICCP handbook and its binding language was noted as an outstanding item, currently out of the hands of the group.</li> </ul> <h3><a href="/sharing/?token=e25985c8-7118-49a9-8a07-488e3704b709">▶️</a>14 - System Protection Working Group (SPWG)</h3> <h4><a href="/sharing/?token=f3ca6f99-f426-4fd9-8085-7bd963756579">▶️</a>14.1 - SPWG Procedure Manual (Vote)</h4> <ul> <li style="font-weight: 400;" aria-level="1">No SPWG representatives were present to give the report.</li> </ul> <h3><a href="/sharing/?token=97c903c8-e391-433a-a031-9505d7c68157">▶️</a>15 - Steady State Working Group (SSWG)</h3> <a href="/storage/docs/2025/04/SSWG_Update_ROS_04032025.pdf">SSWG_Update_ROS_04032025.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">Current status: Ongoing with 2025 SSWG case build.</li> <li style="font-weight: 400;" aria-level="1">Load and Low topology deadline was 03/28/2025.</li> <li style="font-weight: 400;" aria-level="1">Pre-dispatch tuning meetings took place in Houston.</li> <li style="font-weight: 400;" aria-level="1">Deadlines are on track with a target posting for May 23.</li> <li style="font-weight: 400;" aria-level="1">Meetings will continue in late April at the ERCOT Met Center to finalize cases.</li> <li style="font-weight: 400;" aria-level="1">Encouragement for TSPs to send representatives in person to hybrid meetings to enhance tuning process and case quality.</li> <li style="font-weight: 400;" aria-level="1">Formally referred to as SCR789, discussions are ongoing at a high level.</li> <li style="font-weight: 400;" aria-level="1">Planning to schedule joint meetings with SPWG and DSWG to align on SCR789.</li> <li style="font-weight: 400;" aria-level="1">Upcoming procedure manual updates expected by May or June ROS.</li> </ul> <h3><a href="/sharing/?token=320a4739-c658-42d7-bd68-d26ef2d910d5">▶️</a>16 - Planning Working Group (PLWG)</h3> <a href="/storage/docs/2025/04/Planning-Working-Group-Update_040325.pdf">Planning-Working-Group-Update_040325.pdf</a> <h4><a href="/sharing/?token=6a433c1d-c6e4-43e7-9573-d1a3a350a91f">▶️</a>16.1 - PGRR120, SSO Prevention for Generator Interconnection (PLWG) (DWG) (Possible Vote)</h4> <ul> <li style="font-weight: 400;" aria-level="1">The item remains tabled at PLWG.</li> <li style="font-weight: 400;" aria-level="1">Awaiting comments from ERCOT.</li> </ul> <h4><a href="/sharing/?token=741c71d7-8ce0-43b2-860f-9251cc80270c">▶️</a>16.2 - PGRR122, Reliability Performance Criteria for Loss of Load (DWG) (PLWG) (Possible Vote)</h4> <ul> <li style="font-weight: 400;" aria-level="1">Comments on the LCRA draft were reviewed, and ERCOT proposed some changes.</li> <li style="font-weight: 400;" aria-level="1">The PGRR remains tabled to allow for further discussions among TSPs.</li> <li style="font-weight: 400;" aria-level="1">PGRR122 will be discussed at the upcoming DWG meeting in April as they did not meet in March.</li> <li style="font-weight: 400;" aria-level="1">Bill Blevins presented on NPRR1272 regarding multi-supported privacy private use networks at the PLWG meeting.</li> <li style="font-weight: 400;" aria-level="1">PLWG agreed to table NPRR1272 for further discussion.</li> <li style="font-weight: 400;" aria-level="1">Ongoing discussions between ERCOT and Oxy, the sponsor of NPRR1272, are taking place.</li> </ul> <h4><a href="/sharing/?token=04f3b355-d2bf-4d9b-b9a4-9586b4efcca2">▶️</a>16.3 - PGRR124, ESR Maintenance Exception to Modifications (PLWG, DWG) (Possible Vote)</h4> <ul> <li style="font-weight: 400;" aria-level="1">The agenda item PGRR124 was tabled and not discussed.</li> <li style="font-weight: 400;" aria-level="1">Tesla was unable to attend the March meeting.</li> <li style="font-weight: 400;" aria-level="1">The item is scheduled for discussion in the April meeting.</li> </ul> <h3><a href="/sharing/?token=44ab69b2-edb6-40e9-8d8b-af9466fd635b">▶️</a>17 - Voltage Profile Working Group (VPWG)</h3> <ul> <li style="font-weight: 400;" aria-level="1">VPWG had a closed meeting on April 3 to discuss NPRR1272.</li> <li style="font-weight: 400;" aria-level="1">Concerns were raised regarding current planning guidelines and regulations about the VSS.</li> <li style="font-weight: 400;" aria-level="1">Request made to formally refer NPRR to VPWG.</li> <li style="font-weight: 400;" aria-level="1">Plans to schedule a follow-up meeting and draft formal comments in the future.</li> <li style="font-weight: 400;" aria-level="1">NPRR1272 was sent to PLWG and VPWG for further action.</li> </ul> <h3><a href="/sharing/?token=97608bc1-6a9f-4576-9397-0313a4b09ac5">▶️</a>18 - Dynamics Working Group (DWG)</h3> <a href="/storage/docs/2025/04/20250403_DWG-Report-to-ROS-April-2025.pdf">20250403_DWG-Report-to-ROS-April-2025.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">Scheduled an upcoming Webex meeting for April 17 to discuss PGRR124 as requested in the March ROS meeting.</li> <li style="font-weight: 400;" aria-level="1">Meeting details are posted on DWG and RS meeting pages and will be sent to the RS mailing list.</li> <li style="font-weight: 400;" aria-level="1">Fahad Qureshi has reached out to Tesla, the sponsor for NPRR124, but has not received a response.</li> <li style="font-weight: 400;" aria-level="1">Requested Tesla representatives to contact Eric Goff for discussion details prior to the meeting.</li> <li style="font-weight: 400;" aria-level="1">Discussion on guidance needed if the sponsor is not present at the meeting; suggestion is to proceed with the discussion despite absence.</li> </ul> <h3><a href="/sharing/?token=922ae16c-ba2e-4780-8bad-3b64659a0656">▶️</a>19 - Inverter Based Resources Working Group (IBRWG)</h3> <a href="/storage/docs/2025/04/IBRWG-Report-to-ROS-040325.pdf">IBRWG-Report-to-ROS-040325.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">Discussion on performance issues with battery energy storage systems in WMS systems or territory.</li> <li style="font-weight: 400;" aria-level="1">Curtis Holland addressed tripping events, PFR, AGC coordination issues, oscillation issues, and fires.</li> <li style="font-weight: 400;" aria-level="1">Follow-up discussion on HRL in a single resource versus aggregated value for defined IRR group.</li> <li style="font-weight: 400;" aria-level="1">Acciona and ERCOT to discuss and potentially bring follow-up items to future IBRWG meetings. Differing views on the usefulness of the self-limiting facility concept.</li> <li style="font-weight: 400;" aria-level="1">Short updates provided on grid-forming battery deployment in the UK relevant to advanced grid support.</li> <li style="font-weight: 400;" aria-level="1">Mention of useful resources available in the report.</li> </ul> <h4><a href="/sharing/?token=4dd793a6-ee59-4b48-bb52-ed27b2046f05">▶️</a>19.1 - IBRWG Scope (Vote)</h4> <a href="/storage/docs/2025/04/IBRWG_Scope_ROS_Approved_20230706.pdf">IBRWG_Scope_ROS_Approved_20230706.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">Motion to approve the IBRWG scope as revised by ROS added to the combo ballot.</li> <ul> <li style="font-weight: 400;" aria-level="2">Review of ROS goals and the IBRWG scope.</li> <li style="font-weight: 400;" aria-level="2">Clarification that all IBRWG meetings are open to the public to avoid confusion.</li> <li style="font-weight: 400;" aria-level="2">Minor changes include removing references to closed sessions and correcting 'task force' to 'working group'.</li> <li style="font-weight: 400;" aria-level="2">Updating language to reflect the technical nature of IBRWG's work, accommodating technical concept referrals.</li> <li style="font-weight: 400;" aria-level="2">ERCOT recommends removing 'as requested' from the scope for clarity and alignment with other working groups.</li> <li style="font-weight: 400;" aria-level="2">Discussions on how referrals work within ROS and its effects on working group responsibilities.</li> <li style="font-weight: 400;" aria-level="2">Consensus to remove 'as requested' from the document and move forward with other changes.</li> </ul> </ul> <h3><a href="/sharing/?token=ae30ba79-21bb-4d17-adde-32ea4e10933e">▶️</a>20 - Combo Ballot (Vote) -  12:40 p.m.</h3> <ul> <li style="font-weight: 400;" aria-level="1">Motion to approve the combined ballot as presented passed unanimously with no abstentions.</li> </ul> <div class="news-image-container"><img src="/storage/docs/2025/04/20240403ROScombo.png" width="802" height="134" /></div> <div class="news-image-container"><img src="/storage/docs/2025/04/20240403ROScomboitems.png" width="801" height="770" /></div>   <h3><a href="/sharing/?token=8f966b11-4c47-4b91-83a6-1a21cceaa277">▶️</a>21 - Black Start Working Group</h3> <ul> <li style="font-weight: 400;" aria-level="1">The group reviewed a NOGRR in draft status concerning communication.</li> <li style="font-weight: 400;" aria-level="1">ERCOT is examining the draft NOGRR in more detail and will revisit the topic in the next meeting.</li> <li style="font-weight: 400;" aria-level="1">The next meeting is scheduled for June 25.</li> </ul> <h3><a href="/sharing/?token=0047d0b7-f8b1-40ae-bf96-870bf88d1f58">▶️</a>22 - Operations Training Working Group (OTWG)</h3> <a href="/storage/docs/2025/04/April_OTWG_Updates.pdf">April_OTWG_Updates.pdf</a> <ul> <li style="font-weight: 400;" aria-level="1">The presentation was deferred to the next month.</li> </ul> <h3><a href="/sharing/?token=f069f799-172d-45f7-a1f4-d5dd3d9690e9">▶️</a>23 - Other Business</h3> <h4><a href="/sharing/?token=d977b32e-39cf-4032-bf20-5bc7753eab8e">▶️</a>23.1 - Review Open Action Items List</h4> <ul> <li style="font-weight: 400;" aria-level="1">Chris Koenig from Golden Spread suggested removing the action item as they have a path forward.</li> <li style="font-weight: 400;" aria-level="1">Suzy Clifton from ERCOT mentioned the need to confirm with TAC before removing the item.</li> <li style="font-weight: 400;" aria-level="1">The original TAC assignment was related to load shed in real time and connected to a previous Post-Uri recommendation.</li> <li style="font-weight: 400;" aria-level="1">NPRR1238 has now progressed to PRS, and ROS has finished its work on it.</li> <li style="font-weight: 400;" aria-level="1">Confirmation is needed that TAC has completed its review before striking it from the list.</li> <li style="font-weight: 400;" aria-level="1">Nabaraj Pokharel clarified there is no action required from ROS until confirmation is received from TAC.</li> <li style="font-weight: 400;" aria-level="1">Further updates and history will be reported to TAC to avoid confusion regarding NPRR1238.</li> <li style="font-weight: 400;" aria-level="1">The approach is consistent with past actions, where changes are made post-TAC approval.</li> </ul> <h3><a href="/sharing/?token=0f899e77-ee4d-4ff4-a2ef-922d78e42be3">▶️</a>24 - Adjourn</h3>