AI Meeting Summary - 06/14/24 IBRWG Meeting - Webex Only

* This summary was created with AI. It is for reference only and has not been reviewed or edited by human intelligence.

1 - Antitrust Admonition - J. Matevosyan.

2 - Transient Overvoltage Ride Through Conformity Assessment Joint team - IEEE P2800.2 WG

• The discussion focused on the IEEE P2800.2 working group and the need to assess the transient overvoltage (TOV) requirement for Type Testing of Generation and Transmission Equipment.
• The presentation emphasized that the TOV requirement as written applies at the Reference Point of Arrival (RPA), typically the high side of the substation transformer, but the equipment actually affected is at the Point of Connection (POC), which are two different points.
• Three categories of events that can potentially cause TOVs were highlighted, including lightning, switching transients, and resonance phenomena. It was noted that lightning already has defined procedures, and switching transients and resonance need to be properly mitigated rather than ridden through.
• The discussion also focused on how power electronic equipment, such as inverters, responds to high voltage conditions, emphasizing the need for detailed disaggregated modeling of the entire plant to assess the impact of TOVs on individual inverters.
• It was noted that the TOV criteria in its present form is not realistically testable at the equipment level and requires a detailed modeling approach to adequately assess TOV impacts on individual equipment.
• The presentation also discussed the statistical nature of TOV events, the impact of large load tripping post-fault events, and the localized nature of TOVs based on network topology, leading to a takeaway that the focus should be on low probability events and coordinating protection for individual equipment.
• Lastly, discussion also touched on the need for OEMs to provide detailed information on how their equipment can withstand TOVs and the need for coordinated and documented information to gain confidence in equipment capabilities.

3 - Initial Ideas for Modeling Guide Update

• Discussion about modeling process in EMT and the aggregation of models for different components
• Reference Point of Applicability (RPA) mentioned as a key concept instead of Point of Interconnection (POI) for certain scenarios
• Importance of explicit modeling for high frequency phenomena and understanding transient over voltages
• Application of performance requirements for better understanding and design, including considerations for protection systems
• Dissatisfaction with current criteria and the need for a more practical approach
• Focus on SSR issues and the need for special treatment in modeling and analysis
• Need for clear criteria and tests to identify potential issues and violations
• Emphasis on understanding and addressing special cases such as series-compensated lines and associated challenges
• Discussion regarding time constraints but acknowledgment of the helpfulness of the discussion

3.1 - IBRWG Main Meeting

• Discussion on aligning testing requirements with NOGRR245
• Focus on evaluating performance in model quality tests for online plants and updated models
• Timeline for discussing requirements, involving metadata and procedures
• Proposed changes in voltage ride through curves, including testing criteria
• Emphasis on the need for test requirement on transient over voltage conditions
• Criteria for new curves and active current injection discussed
• Question raised on duration between voltage events in simulation plots

4 - NOGRR245 Update S. Solis - ERCOT

• Progress update on NOGRR245, with revisions to address reliability concerns
• Upcoming consideration of the revised version at the R&M meeting and board discussion

5 - NERC Standards Update PRC-029 IBR Ride Through Standard X. Wang - ENEL

• PRC-029 drafting language presentation by X. Wang (ENEL).
• Project 2020-02 updates and contributions from various team members.
• Project background: started in February 2020, involving PRC-024-3 updates.
• New SAR initiated in 2022 after event analyses revealed shortcomings in PRC-024-3.
• Drafting team combined SARs to revise PRC-024-3, adding Type 1 and Type 2 wind generators.
• Creation of PRC-029 to address inverter-based resources (IBRs) during disturbances.
• Performance criteria-based ride-through requirements for IBRs.
• Extensive updates to PRC-029 after stakeholder comments.
• Specific changes and clarifications made to the draft language.
• Functional entities covered include IBR owners, transmission owners, and HVDC-connected IBRs.
• Definitions and inclusions of various IBR types like wind turbines, solar PV inverters, battery systems, and fuel cell resources.
• Coordination between the PRC-029 and other ongoing standards like PRC-028.
• Detailed explanations of voltage and frequency ride-through requirements and exemptions.
• Specific requirements and exceptions for IBR plants during disturbances.
• Discussion on operational and performance criteria for IBRs.
• Exemptions process for existing units under certain conditions.
• Presentation on ERCOT IBR model deficiencies alert.
• Importance of accurate and detailed models for IBRs.
• Recommendations for coordinating with equipment manufacturers and maintaining model accuracy.
• Submission of models and related data by generator owners and transmission planners.
• Discussion on the use of generic versus user-defined models for interconnection-wide and local studies.
• Emphasis on ensuring accurate representation of IBR performance in models.
• Need for clear, specific language in standards and recommendations.
• Acknowledgment of challenges and ongoing efforts to improve model accuracy and reliability.

6 - Other Industry Updates J. Matevosyan - ESIG

• FERC has approved MISO's tariff red lines for the first round of IEEE 2800 implementation.
• MISO has published a white paper outlining the proposal to adopt grid forming capabilities for battery energy storage, following NERC white paper and AEMO's requirements.
• MISO's requirements are a subset of currently available grid forming battery capabilities, which can be enacted with software changes only, not requiring any hardware changes.
• The association of system operators in Europe updated their current network connection code with non-exhaustive grid forming requirements and proposed a guidance document for exhaustive grid forming requirements.
• ERCOT has created a webpage to track progress on grid forming technology development and deployment, including installed projects, published specifications, and studies focusing on benefits and impacts of grid forming resources on the grid.
• There is a DOE funded project focusing on interconnection standards with monthly meetings and upcoming meetings focused on ride through.