Load Comparison: 1,306 MWs higher than 2023 October peak demand
There were 3 frequency events, all were due to unit trips
No ECRS or RRS released in October
No DC Tie Curtailments
49 HRUC Commitments which were mostly related to capacity issues or congestion
7 Emergency Condition Notices (OCNs) issued:
4 related to PNHNDL, 3 of which were notifying a topology change that impacts the limit, and 1 relates to the outage actually resulting in ERCOT taking manual action for the PNHNDL GTC IROL
2 issues related to extreme hot weather as well as a potential capacity shortage reserve
1 issue related to GTC (Generic Transmission Constraint)
4 Advisories issued for Geomagnetic disturbance (GMD) of [K-7] or Higher.
Impact: Minimal real-time operations impact
Discussion: Opened floor for questions, none raised
▶️5.1 - PGRR117, Addition of Resiliency Assessment and Criteria to Reflect PUCT Rule Changes
Motion to endorse and forward to TAC the 11/7/24 ROS Report and 7/17/24 Impact Analysis for PGRR117 added to the combo ballot.
O&M costs related to the item were mentioned.
The implementation is contingent on PUC approval.
▶️5.2 - NOGRR272, Advanced Grid Support Requirements for Inverter-Based ESRs
Motion to table NOGRR272 and refer the issue to DWG and IBRWG added to the combo ballot.
Comments from Jupiter Power and potential input from Tesla were acknowledged regarding the proposal.
Technical and policy concerns were raised about the proposal’s current language and its implications for compliance by energy storage resources (ESRs).
The need for specific compliance standards from ERCOT was emphasized to ensure operators can meet performance requirements.
Policy issues stem from the proposal mandating requirements potentially increasing costs for a subset of technology without providing market-based incentives.
The suggestion to consider this proposal as an ancillary service instead, potentially to be compensated for providing extra grid stability, was discussed.
Discussion included comparing how other jurisdictions address similar grid support requirements—some through incentives or government funding.
Acknowledgement that current language is vague and lacks specifics, which causes compliance and competitive market concerns.
Bob Helton, ENGOE, discussed writing an NPRR to address policy issues and create a stakeholder platform for further discussion.
There was a proposal to table this item for more detailed discussions across working groups (DWG and others).
Julia Matevosyan from ESIG provided an international perspective on similar requirements in other regions and the handling of technical standards.
Caitlin Smith and Bob helton indicated their position on seeking for market-based solutions and clarity on the proposal to avoid imposing undue burdens on specific technologies.
Various ERCOT stakeholders discussed the potential impacts and technical aspects, agreeing on further stakeholder engagement to refine the proposal.
▶️5.3 - PGRR121, Related to NOGRR272, Advanced Grid Support Requirements for Inverter-Based ESRs
Motion to table PGRR121 and refer the issue to DWG and IBRWG added to the combo ballot.
NOGRR272 and PGRR121 will be sent to DWG and IBRWG.
Plan to add these items to the combo ballot if no opposition is present.
▶️5.4 - PGRR122, Reliability Performance Criteria for Loss of Load
Motion to table PGRR122 and refer the issue to DWG and PLWG added to the combo ballot.
The need for performance criteria due to increasing large loads connecting to the ERCOT system.
A 1,000 MW limit is proposed for any large load to prevent frequency instability and generator trips.
In case of a contingency event, the system should handle less than 1 gigawatt of load loss.
Possible system upgrades like synchronous condensers or grid-forming STATCOMs might be necessary.
The proposal will be further discussed with DWG and PLWG.
Questions raised about handling multiple large loads in an area and system capability to manage load loss.
Clarification on how interconnection for large loads greater than 1 GW should be managed.
Discussion on various possible scenarios and potential solutions, including not being too prescriptive and allowing for creative solutions.
The ongoing discussion in other working groups like OWG, PDCWG, and inclusion of presentations on similar issues.
Considerations for cumulative load requests and updating figures in planning studies.
Clarity on requirements specific to standalone vs co-located large loads.
Consultation with other ISOs, with acknowledgment of differing system sizes and capacities globally.
▶️10.1 - PGRR115, Related to NPRR1234, Interconnection Requirements for Large Loads and Modeling Standards for Loads 25 MW or Greater - PLWG - Possible Vote
PLWG met on November 12th to discuss PGRR115 and its implications for large loads and modeling standards for loads of 25 MWs or greater.
ERCOT reviewed reply comments on PGRR115 and NPRR1234, both dated November 11th.
Discussion included potential overlap of PGRR115 with PGRR122, specifically concerning the 1000 MW total load loss limit in PGRR122.
Jeff provided input on the discussion and the possibility of a combo ballot vote at PLWG.
A decision was made to table PGRR115 for further discussion in December.
▶️10.2 - PGRR119, Stability Constraint Modeling Assumptions in the Regional Transmission Plan - PLWG - Possible Vote
PGRR119 formalizes ERCOT's existing practice of applying a reliability margin, such as 10%, to stability constraints in the Regional Transmission Plan (RTP).
Discussion centered around the OPUC's comments dated November 6th.
Consensus was reached by PLWG on the original version of PGRR119, which was submitted by ERCOT on September 9th.
There were comments from joint commenters with suggestions for edits and clarifications to address concerns and enhance clarity.
Request to return the item to PLWG for further discussion, agreed upon for a future meeting on December 18th.
▶️10.3 - PGRR120, SSO Prevention for Generator Interconnection - PLWG - DWG - Possible Vote
PGRR120 will prohibit future generation resources from interconnecting on a seriously compensated circuit that could cause generation to become radial to a series capacitor during an n minus one contingency event.
ERCOT presented an overview of the draft presentation at PLWG, previously seen at prior ROS meetings.
Discussions included SSO study process, potential OEM technology to mitigate SSO effects, and recent SSO events affecting multiple generators.
PLWG decided to table PGRR120 pending further discussion at the December meeting.
NERC Topics Roundtable includes discussions on hot topics such as NERC CIP-014-4 and TPL-008-1 Transmission Planning Performance Requirements for extreme weather.
An open action item involves reviewing and revising the term 'Load' in the Planning Guide to align with protocol section 2 terminology.
The group plans to review one section of the Planning Guide at each meeting, starting in December, and is seeking a sponsor for the revision request.
Expressions of gratitude for the group's work on NPRR1247 and other tasks throughout the year.
▶️ 11 - Performance, Disturbance, Compliance Working Group - PDCWG - Kevin Bunch
Discussion on PFR performance under deep curtailment for IBRs continued from October. Another manufacturer confirmed the existence of a minimum technical limit for wind resources, below which IBR performance degrades.
Nick Miller from HickoryLedge provided insights on why performance below this limit isn't possible.
Sunwook provided an update on the status and next steps for NOGRR and PGRR documents.
A coordination item between SPWG and IBRWG was discussed regarding the multiple right through capability of IBRs and the auto reclosing schemes used by transmission owners.
A survey conducted by SPWG on auto reclosing strategies highlighted the need for site-specific settings and better coordination between IBR developers and TDSPs.
The possibility of including coordination language in the ERCOT Resource Integration Handbook was proposed, with the item remaining open for further discussion.
NERC and other industry updates included MISO's proposal for grid forming requirements for battery storage to be implemented in January.
Three new NERC standards, PRC-028, PRC-029, and PRC-030, have been filed with FERC, focusing on data measurement, right through standards for IBRs, and root cause analysis for disturbances.
NERC is starting a new milestone focused on modeling with several open projects, and a technical workshop is scheduled for January 15th and 16th.
Next meeting scheduled for next Friday.
▶️ 16 - System Protection Working Group - SPWG - Mark McChesney
Leadership election held; Mark McChesney of Oncor continues as chair for 2025; Jordan Watkins, CNP, nominated as Vice chair.
Updates received from Texas RE regarding operation statistics through Q2 of 2024.
Updates provided on NERC PRC activities and standards.
Reviewed an IBR reclosing survey and practices; limited and inconsistent responses received.
Discussion on IEEE 2800 standards including number of reclosing events for IBRs and maximum phase angle jump.
Reviewed comparison of case build statistics between steady state working group and short circuit model.
Presentation on IBR challenges, focusing on lack of negative sequence current injection and issues with directional elements during phaser-based protection.
▶️ 17 - Steady State Working Group - SSWG - William Robertson
