Motion to table PGRR120 and refer the issue to PLWG and DWG added to combo ballot
Background information was provided on the series capacitors in the ERCOT system, initially installed to facilitate renewable energy transfer and other generation transfers.
Defined various types of subsynchronous oscillations including SSR, SSCI, and SSFR, and discussed SSR mitigation strategies present in ERCOT protocols.
Highlighted historical SSO events and the continued occurrence of SSR events, despite existing mitigation measures, causing delays and equipment issues.
The proposal of PGRR120 aims to prevent new generation projects from interconnecting such that they are N-1 (one Credible Single Contingency) from being radial to a series capacitor(s) and includes measures for generator modifications and real-time SSO mitigation.
Clarified that the mitigation requirements primarily apply to new transmission-connected generators and addressed informal comments regarding distributed generation.
Cyrus Reed raised questions about the distribution of mitigation responsibilities between generators and TDUs, discovering that the generator community carries most of the financial responsibility for SSR mitigation.
It was revealed that fully mitigating SSR issues is complex and challenging, leading to the proposal to prevent new generators from connecting in high-risk configurations.
There was a suggestion to analyze and determine the impact on generators currently in the queue and understand how many projects might be affected by the proposed PGRR120.
Questions were raised by other participants on the SSO event list, the number of affected projects, and the handling of series capacitors.
Clarified that ERCOT requested PGRR120 be tabled and referred to PLWG and DWG, reflecting the complexity and need for further analysis.
6.5 - NOGRR271, Related to NPRR1257, Limit on Amount of RRS a Resource can Provide Using Primary Frequency Response
Motion to table NOGRR271 and refer the issue to PDCWG added to combo ballot
7 - NPRR1257, Limit on Amount of RRS a Resource can Provide Using Primary Frequency Response - Possible Vote - Katie Rich
Motion to request PRS to table NPRR1257 for further review by PDCWG added to combo ballot
8 - Revision Requests Tabled at PRS and Referred to ROS - Possible Vote - Katie Rich.
8.1 - NPRR1229, Real-Time Constraint Management Plan Energy Payment
NPRR1229 is currently being reviewed by WMWG.
No updates or discussions were conducted during this meeting on this agenda item.
8.2 - NPRR1234, Interconnection Requirements for Large Loads and Modeling Standards for Loads 25 MW or Greater - NDSWG
NPRR1234 is under review by the NDSWG.
A presentation on NPRR1234 is expected to be given today.
9 - Revision Requests Tabled at ROS - Possible Vote - Katie Rich
9.1 - PGRR073, Related to NPRR956, Designation of Providers of Transmission Additions
PGRR073 will remain in its current status.
The meeting will proceed with OWG's presentation followed by a break.
Eithar Nashawati from Oncor inquired about NPRR1229 and its expectation from ROS.
The NPRR229 remains tabled to address questions from ERCOT to STEC, which are technical and market-related.
The need for input from ROS is a reason for the item staying tabled.
10 - Operations Working Group - OWG - Rickey Floyd
Dylan Preas and Mina Turner outlined the agenda for NPRR1247.
Initial updates were provided before addressing specific slides on NPRR1247.
Dylan Preas introduced himself as the PLWG Chair.
The Planning Working Group meeting took place on October 16th.
11.1 - PGRR115, Related to NPRR1234, Interconnection Requirements for Large Loads and Modeling Standards for Loads 25 MW or Greater - PLWG - Possible Vote
PGRR115 interconnection requirements for large loads were reviewed.
Focus on modeling standards for loads 25 MWor greater.
Reviewed comments from AEP on larger load rules and processes.
Included discussion of new terms and applicable thresholds for large generator interconnection studies.
Consideration of loads requested in neighboring TSPs within the same area.
ERCOT plans to submit reply comments before the November 12th PLWG meeting.
The item was tabled for further discussion.
11.2 - PGRR117, Addition of Resiliency Assessment and Criteria to Reflect PUCT Rule Changes - PLWG - Possible Vote
Motion to recommend approval of PGRR117 as amended by the 10/11/24 ERCOT comments added to combo ballot
PGRR117 is being passed on to ROS for consideration.
The addition of resiliency assessment and criteria is introduced in Section 3 (regional planning) and Section 4 (transmission system criteria) of the Planning guide.
ERCOT’s 10/11/24 comments were reviewed.
There's a concern about the lack of a clear process on using the results from the resiliency assessment.
ERCOT plans to propose an NPRR to address how to evaluate upgrades meeting the proposed resiliency criteria.
The recommendation to move forward to ROS is based on ERCOT’s comments.
11.3 - PGRR119, Stability Constraint Modeling Assumptions in the Regional Transmission Plan
Introduction of PGRR119 regarding stability constraint modeling assumptions in the Regional Transmission Plan (RTP).
First presentation of this item to PLWG.
Review by ERCOT which formalizes the current practice of applying a reliability margin to stability constraints.
Modeling of constraints takes place in RTP reliability and economic base cases.
Request made to table the item for further discussion after an initial review.
11.4 - NPRR1247, Incorporation of Congestion Cost Savings Test in Economic Evaluation of Transmission Projects - PLWG - Possible Vote
Motion to endorse NPRR1247 as amended by the 10/23/24 ERCOT comments
Motion carries with 76.9% in favor, and 11 abstentions.
NPRR1247 was initially skipped and then reintroduced for discussion.
Discussion included NERC CIP-014-4 revisions and its ballot failure.
NERC TPL-008-1 on transmission planning for extreme weather was mentioned.
Review of load planning language from PGRR107 will be revisited in October or November.
Discussion about moving forward with PGRR117; added to the combo ballot.
Dylan presented NPRR1247's purpose and outcome of the special October 29th meeting.
PLWG draft with luminant comments was highlighted featuring three main language changes.
ERCOT's comments post-PLWG meeting were discussed, noting oppositions to incorporating certain white papers.
Option to consider and vote on ERCOT or PLWG versions of the NPRR based on white papers impact.
Concerns over voting urgency and procedural constraints were expressed.
12 - Network Data Support Working Group - NDSWG - Gerardo Escamilla
