Project 2015-09 Establish and Communicate System Operating Limits

Status
Board Adopted: May 13, 2021

Filed with FERC: June 28, 2021

Background
Facilities Design, Connections, and Maintenance (FAC) standards fulfill an important reliability objective for determining and communicating System Operating Limits (SOLs) used in the reliable planning and operation of the Bulk Electric System (BES). This project will revise requirements for determining and communicating these SOLs. Revisions are necessary to improve the requirements by eliminating overlap with approved Transmission Planning (TPL) requirements, enhancing consistency with Transmission Operations (TOP) and Interconnection Reliability Operations (IRO) standards, and addressing issues with determining and communicating SOLs and Interconnection Reliability Operating Limits (IROLs).

Standards Affected: CIP-014-2 – Physical Security | FAC-003-4 – Transmission Vegetation Management | FAC-010-3 - System Operating Limits Methodology for the Planning Horizon | FAC-011-3 - System Operating Limits Methodology for the Operations Horizon | FAC-013-2 – Assessment of Transfer Capability for the Near-term Transmission Planning Horizon | FAC-014-2 - Establish and Communicate System Operating Limit | PRC-002-2 – Disturbance Monitoring and Reporting Requirements | PRC-023-4 – Transmission Relay Loadability | PRC-026-1 – Relay Performance During Stable Power Swings | IRO-008-2 - Reliability Coordinator Operational Analyses and Real-time Assessments | TOP-001-5 – Transmission Operations

Purpose/Industry Need

The project will revise the requirements for determining and communicating SOLs and IROLs to address the issues identified in Project 2015-03 Periodic Review of System Operating Limit Standards. The resulting standard(s) and definition(s) will benefit reliability by improving alignment with approved TPL and proposed TOP and IRO standards. The project may result in development of one or more proposed Reliability Standards and definitions.

Draft	Actions	Dates	Results	Consideration of Comments
Final Draft Definitions Proposed Definition of System Operating Limit (SOL) Clean \| Redline Proposed Definition of System Voltage Limit	Final Ballot Info Vote	04/29/21 – 05/10/21	Ballot Results Proposed Definition of SOL Proposed Definition of System Voltage Limit
Final Draft FAC-011-4 Clean \| Redline to Last Posted \| Redline to Approved FAC-014-3 Clean \| Redline to Last Posted \| Redline to Approved FAC-003-5 Clean \| Redline to Last Posted \| Redline to Approved PRC-002-3 Clean \| Redline to Last Posted\| Redline to Approved PRC-023-5 Clean \| Redline to Last Posted \| Redline to Approved PRC-026-2 Clean \| Redline to Last Posted \| Redline to Approved IRO-008-3 Clean \| Redline to Approved TOP-001-6 Clean \| Redline to Approved Implementation Plan Clean \| Redline Definitions Proposed Definition of System Operating Limit (SOL) Clean \| Redline Proposed Definition of System Voltage Limit Supporting Materials Mapping Documents FAC-010-3 Clean \| Redline to Last Posted FAC-011-4 Clean \| Redline to Last Posted FAC-014-3 Clean \| Redline to Last Posted IRO-008-3 TOP-001-6 Clean \| Redline to Last Posted VRF/VSL Justification FAC-011-4 Clean \| Redline to Last Posted FAC-014-3 Clean \| Redline to Last Posted IRO-008-3 Clean \| Redline to Last Posted TOP-001-6 Clean \| Redline to Last Posted Requirement Rationales FAC-011-4 FAC-014-3 IRO-008-3 TOP-001-6 NERC SOL Whitepaper Clean \| Redline to Last Posted	Final Ballot Info Vote	04/19/21 – 04/28/21	Ballot Results FAC-011-4 FAC-014-3 FAC-003-5 PRC-002-3 PRC-023-5 PRC-026-2 IRO-008-3 TOP-001-6 Implementation Plan
Draft 5 FAC-014-3 Clean \| Redline to Last Posted Supporting Materials Unofficial Comment Form (Word) Mapping Document FAC-014-3 Clean \| Redline to Last Posted VRF/VSL Justification FAC-014-3 Clean \| Redline to Last Posted Requirement Rationale FAC-014-3 CIP-002 and CIP-014	Additional Ballots and Non-binding Polls Info Vote	02/19/21 - 04/05/21	Ballot Results FAC-014-3 Non-binding Poll Results FAC-014-3	Consideration of Comments
	Comment Period Info Submit Comments	02/19/21 - 04/05/21	Comments Received	Consideration of Comments
Draft 4 FAC-014-3 Clean \| Redline to Last Posted Implementation Plan Clean \| Redline to Last Posted Supporting Materials Unofficial Comment Form (Word) Mapping Document (Updated) FAC-014-3 Clean \| Redline to Last Posted VRF/VSL Justification FAC-014-3 Clean \| Redline to Last Posted Requirement Rationale FAC-014-3	Additional Ballots and Non-binding Polls Info Vote	11/27/20 - 12/07/20	Ballot Results FAC-014-3 Implementation Plan Non-binding Poll Results FAC-014-3	Consideration of Comments
	Comment Period Info Submit Comments	10/23/20 - 12/07/20	Comments Received	Consideration of Comments
Draft 3 FAC-011-4 Clean \| Redline to Last Posted FAC-014-3 Clean \| Redline to Last Posted Implementation Plan Clean \| Redline to Last Posted Draft 2 CIP-014-3 Clean \| Redline to Last Posted FAC-003-5 Clean \| Redline to Last Posted FAC-013-3 Clean \| Redline to Last Posted PRC-002-3 Clean \| Redline to Last Posted PRC-023-5 Clean \| Redline to Last Posted PRC-026-2 Clean \| Redline to Last Posted Draft 1 IRO-008-3 Clean \| Redline to Approved TOP-001-6 Clean \| Redline to Approved Supporting Materials Unofficial Comment Form (Word) Mapping Documents FAC-010-3 Clean \| Redline to Last Posted FAC-011-4 Clean \| Redline to Last Posted FAC-014-3 Clean \| Redline to Last Posted IRO-008-3 TOP-001-6 VRF/VSL Justifications FAC-011-4 Clean \| Redline to Last Posted FAC-014-3 Clean \| Redline to Last Posted IRO-008-3 TOP-001-6 Requirement Rationales FAC-011-4 FAC-014-3 IRO-008-3 TOP-001-6 NERC SOL Whitepaper Clean \| Redline to Last Posted Draft Reliability Standard Audit Worksheets (RSAWs) FAC-011-4 FAC-014-3 IRO-008-3 TOP-001-6	Initial / Additional Ballots and Non-binding Polls Extended Info Updated Info Info Vote	07/24/20 - 08/26/20 (Extended)	Ballot Results Non-Binding Poll Results
	Comment Period Extended Info Updated Info Info Submit Comments	06/19/20 - 08/26/20 (Extended)	Comments Received	Consideration of Comments (Complete set of questions) Consideration of Comments (Questions 4 and 5 regarding FAC-014)
	Join Ballot Pools Send RSAW feedback to: RSAWfeedback@nerc.net	06/19/20 - 07/20/20	Comments Received
Draft 2 FAC-011-4 Clean \| Redline to Last Posted FAC-014-3 Clean \| Redline to Last Posted FAC-015-1 (Updated) Clean \| Redline to Last Posted Implementation Plan Clean \| Redline to Last Posted Draft 1 CIP-014-3 Clean \| Redline to Last Approved FAC-003-5 Clean \| Redline to Last Approved FAC-013-3 Clean \| Redline to Last Approved PRC-002-3 Clean \| Redline to Last Approved PRC-023-5 Clean \| Redline to Last Approved PRC-026-2 Clean \| Redline to Last Approved Proposed Definition of System Operating Limit Supporting Materials Unofficial Comment Form (Word) Mapping Documents FAC-010-3 Clean \| Redline to Last Posted FAC-011-3 Clean \| Redline to Last Posted FAC-014-2 Clean \| Redline to Last Posted Standards Impacted by Retirement of FAC-010-3 (Word) VRF/VSL Justifications FAC-011-4 Clean \| Redline to Last Posted FAC-014-3 Clean \| Redline to Last Posted FAC-015-1 Clean \| Redline to Last Posted Requirement Rationales FAC-010-3 / FAC-015-1 SDT Rationale Clean \| Redline to Last Posted FAC-011-4 Clean \| Redline to Last Posted FAC-014-3 Clean \| Redline to Last Posted FAC-015-1 (Updated) Clean \| Redline to Last Posted SOL Definition Impact NERC SOL Whitepaper Clean \| Redline to Last Posted Draft Reliability Standard Audit Worksheets (RSAWs) FAC-011-4 FAC-014-3 FAC-015-1 Coming Soon	Initial / Additional Ballots and Non-binding Polls Info Vote	10/08/18 - 10/17/18	Ballot Results FAC-011-4 FAC-014-3 FAC-015-1 CIP-014-3 FAC-003-5 FAC-013-3 PRC-002-3 PRC-023-5 PRC-026-2 Implementation Plan System Operating Limit Definition Non-binding Poll Results FAC-011-4 FAC-014-3 FAC-015-1 CIP-014-3 FAC-003-5 FAC-013-3 PRC-002-3 PRC-023-5 PRC-026-2
	Comment Period Info Submit Comments	08/24/18 - 10/17/18* (extended due to typographical errors)	Comments Received	Consideration of Comments
	Join Ballot Pools	08/24/18 - 09/24/18
	Info Send RSAW feedback to: RSAWfeedback@nerc.net	Coming Soon
Draft 1 Retirement of FAC-010-3 FAC-011-4 Clean \| Redline to Last Approved FAC-014-3 Clean \| Redline to Last Approved FAC-015-1 Proposed Definition of System Voltage Limit Implementation Plan Supporting Materials Unofficial Comment Form (Word) Mapping Documents FAC-010-3 FAC-011-3 FAC-014-2 VRF/VSL Justifications FAC-011-4 FAC-014-3 FAC-015-1 Requirement Rationales FAC-010-3 / FAC-015-1 SDT Rationale FAC-011-4 FAC-014-3 FAC-015-1 Standards Impacted by Retirement of FAC-010-3 Draft Reliability Standard Audit Worksheets (RSAWs) FAC-011-4 FAC-014-3 FAC-015-1	Initial Ballots and Non-binding Polls Updated Info Info Vote	11/03/17 – 11/13/17 The ballots were extended an additional day to reach quorum and closed November 14, 2017	Ballot Results FAC-011-4 FAC-014-3 FAC-015-1 Implementation Plan System Voltage Limit Definition Non-binding Poll Results FAC-011-4 FAC-014-3 FAC-015-1
	Comment Period Info Submit Comments	09/29/17 – 11/13/17	Comments Received	Consideration of Comments
	Join Ballot Pools	09/29/17 – 10/30/17
	Info Send RSAW feedback to: RSAWfeedback@nerc.net	10/17/17 - 11/13/17
Definitions Proposed Definitions of System Operating Limit (SOL) and SOL Exceedance Supporting Materials Standard Authorization Request Clean \| Redline to Last Posted Unofficial Comment Form (Word) SOL / SOL Exceedance Rationale SOL/SOL Exceedance Standards Impacted	Comment Period Info Submit Comments	09/29/17 – 10/30/17	Comments Received	Consideration of Comments
Informal Comment Draft FAC-011-4 FAC-014-3 Supporting Documents FAC-011-4 Unofficial Comment Form (Word) FAC-014-3 Unofficial Comment Form (Word) Summary of Proposed Revisions	Comment Period Info Submit Comments	07/14/16 - 08/12/16	Comments Received FAC-011-4 FAC-014-3
Standard Authorization Request Supporting Materials Unofficial Comment Form (Word)	Comment Period Info Submit Comments	08/20/15 - 09/21/15	Comments Received
Drafting Team Nominations Supporting Materials Unofficial Nomination Form (Word)	Nomination Period Info Submit Nominations	08/20/15 - 09/02/15

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