Project 2015-09 Establish and Communicate System Operating Limits

​​​​​​Related Files

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.
 
DraftActionsDatesResultsConsideration of Comments
Final Draft


Definitions

Proposed Definition of System Operating Limit (SOL)
Clean | Redline

Proposed Definition of System Voltage Limit





Final Ballot


Info​

Vote​



04/2​9/21 – 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 | Redli​ne to Last Posted

​VRF/VSL Justification

FAC-011-4
Clean | Redline to Last Posted

FAC-014-3
C​lean | Redline to Last Posted

TOP-001-6
C​lean | 
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​







04/1​9/21 – 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​

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​

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 

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-014-3

 

Implementation Plan

 
 

Non-binding Poll Results

FAC-011-4
 

 FAC-014-3

 

 

 

 

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 Reliability Standard Audit Worksheets (RSAWs)
 
 
 
 
 
















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-014-3

 

Implementation Plan

 
 

Non-binding Poll Results

 
 
 

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
 
 
Send RSAW feedback to:
 





10/17/17 - 11/13/17
 
 
Definitions
 
 
Supporting Materials
 
 Standard Authorization Request
Clean | Redline to Last Posted
 
 
 



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 

Comment Period
 
 
 
 
 
 
07/14/16 - 08/12/16​

Comments Received

 

FAC-011-4

 

FAC-014-3

 
 
Supporting Materials
 
 
Comment Period
 
 




08/20/15 - 09/21/15




Comments Received
Drafting Team Nominations
 
Supporting Materials
 
Nomination Period
 
 
 
 



08/20/15 - 09/02/15​