Agenda Reliability and Security Technical Comm ittee

1 Agenda Reliability and Security Technical Committee December 15, 2021 | 11:00 4:30 Eastern Time Virtual Meeting via WebEx Attendee WebEx Link: Join Meeting Call to Order NERC Antitrust Compliance Guidelines and Public Announcement*. Introductions and Chair's Remarks Agenda 1. Energy Reliability Assessments Task Force (ERATF) Recommendations* Information Peter Brandien, ERATF Chair | Jim Piro, Sponsor The ERATF is assessing risks associated with unassured energy supplies, including the timing and inconsistent output from variable renewable energy resources, fuel location, and volatility in forecasted load, which can result in insufficient amounts of energy on the system to serve electrical demand.

2 The ERATF is providing an update of their work including a draft SAR for RSTC. review as well as a plan to gather industry input for development of a final SAR for RSTC. endorsement in March, 2022. 2. Reliability Guideline: Cyber Intrusion Guide for the System Operator* - Accept to Post for 45- day Comment Period Jimmy Hartmann, RTOS Chair | Todd Lucas, Sponsor As part of the three-year review cycle for Reliability Guidelines, the Reliability Guideline: Cyber Intrusion Guide for the System Operator was reviewed and updated. The update includes the additions of specific metrics to facilitate determining the effectiveness of the guideline per the FERC Order.

3 The RTOS is seeking RSTC acceptance to post the guideline for a 45-day comment period. 3. GMD Monitoring Reference Document* Accept to Post for 45-day Comment Period . Jimmy Hartmann, RTOS Chair | Todd Lucas, Sponsor As part of the three-year review cycle for Reference Documents, the GMD Monitoring Reference Document was reviewed and updated. The RTOS is seeking RSTC acceptance to post the guideline for a 45-day comment period. 4. Resources Subcommittee (RS) Reporting ACE Definition SAR* Endorse Greg Park, RS Chair |. Rich Hydzik, Sponsor The current definition of Reporting ACE has a conflict with the Western Interconnection's Automatic Time Error Correction (ATEC) process and does not allow other Interconnections to pursue ATEC.

4 Additionally, there could be some confusion in that the terms ACE and Reporting ACE are both used throughout the standards. The RS has a revised draft of the Reporting ACE. definition that accommodates any Interconnection that has an approved ATEC process. The Reliability | RESILIENCE | Security . revised definition is also shortened to remove verbiage that duplicates obligations in the BAL. standards. Having duplicative language adds complexity to future changes to the applicable BAL. standards. The RS is seeking RSTC endorsement of the SAR and subsequent submittal to the Standards Committee for action.

5 5. White Paper: Grid Forming Technology, Bulk Power System Reliability Considerations* . Approve - Julia Matevoysan, IRPWG Vice Chair | Jody Green, Sponsor As inverter-based resources (IBRs) penetrations continue to grow across North America, grid dynamics and controls strategies have also adapted and advanced over the recent years. One such technology that is now gaining momentum is grid forming (GFM) inverter technology. GFM. inverters have been widely researched in battery energy storage systems (BESS), wind power plants, solar photovoltaic (PV) plants, and hybrid plants. Further, there are several installed projects where GFM functions have been successfully tested, including extremely fast power injection in the inertial timeframe in response to frequency events, islanded operation capability without synchronous generation, blackstart capability, and operation in parallel with grid following (GFL) resources and synchronous machines.

6 Widespread understanding of GFM controls and their impacts to bulk power system performance is still in the early stages; however, the technology shows significant promise. The IRPWG has developed a White Paper with recommendations on this subject and is seeking RSTC approval. 6. White Paper: BPS-Connected IBR and Hybrid Plant Capabilities for Frequency Response* . Approve - Julia Matevoysan, IRPWG Vice Chair | Jody Green, Sponsor The Federal Energy Regulatory Commission (FERC) issued Order No. 842 in 2018, amending the pro forma Large Generator Interconnection Agreement (LGIA) and Small Generator Interconnection Agreement (SGIA) to require all newly interconnecting large and small generating facilities, both synchronous and non-synchronous, to install, maintain, and operate equipment capable of providing primary frequency response (PFR) as a condition of interconnection.

7 On the same subject, NERC recently published a white paper, Fast Frequency Response Concepts and Bulk Power System Reliability Needs, in March 2020 describing the interrelationships between primary frequency response (PFR) and fast frequency response (FFR). This work extends on the FERC Order NO. 842 and the NERC white paper and recommends leveraging PFR and FFR capabilities from inverter-based resources to the extent possible to support BPS frequency as an essential Reliability service. The IRPWG has developed a White Paper with recommendations on this subject and is seeking RSTC approval.

8 LUNCH BREAK 20 MINS. 7. TPL-001-5 SAR for BPS-Connected IBRs* Endorse - Julia Matevoysan, IRPWG Vice Chair | Jody Green, Sponsor The NERC IRPWG (formerly IRPTF) undertook a complete review of the NERC Reliability Standards in the context of increasing levels of BPS-connected inverter-based resources and published a white paper on the outcomes and recommendations of this review in March 2020. The review was approved by the NERC Planning Committee and served as the Technical justification for future standards revision efforts. Based on the outcome of the review, it was determined that the TPL- 001-4/5 needed clarifications to address terminology throughout the standard that is unclear with regards to inverter-based resources the next time the standard is revised.

9 The IRPWG. brought a SAR to the RSTC in March 2021 which was not endorsed. The IRPWG sought and Agenda Reliability and Security Technical Committee December 15, 2021 2. received feedback from RSTC members and addressed the comments and made conforming revisions to the SAR. The IRPWG is seeking endorsement of the proposed SAR and subsequent submittal to the Standards Committee for action. 8. TPL-001-5 SAR for BPS-Connected IBRs* Endorse - Kun Zhu, SPIDERWG Chair | Wayne Guttormson, Sponsor The NERC SPIDERWG undertook a review of the TPL-001 standard considering the potential impact of DERs.

10 This review is captured in the following RSTC-approved white paper and serves as the Technical justification for the revisions suggested in this SAR: SPIDERWG: Assessment of DER impacts on NERC Reliability Standard TPL-001 (here). This SAR proposes to update to address some of the issues identified in the white paper. The SPIDERWG brought a SAR to the RSTC in March 2021 which was not endorsed. The SPIDERWG sought and received feedback from RSTC members and addressed the comments and made conforming revisions to the SAR. The SPIDERWG is seeking endorsement of the proposed SAR and subsequent submittal to the Standards Committee for action.