Determine Facility Ratings, SOLs and Transfer Capabilities Paul Johnson Chair of the Determine...
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![Page 1: Determine Facility Ratings, SOLs and Transfer Capabilities Paul Johnson Chair of the Determine Facility Ratings Standard Drafting Team An Overview of the.](https://reader035.fdocuments.us/reader035/viewer/2022081519/56649e045503460f94af0f02/html5/thumbnails/1.jpg)
Determine Facility Ratings, SOLs and Transfer Capabilities
Paul JohnsonChair of the Determine Facility Ratings
Standard Drafting Team
An Overview of the Set of Proposed Standards
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Presentation Overview
Proposed Standards Highlights of Standards Key Requirements & Functions Responsible Challenging Definitions Controversial Issues V0 Retirements Effective Dates Questions
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6 Standards
1. Document Facility Rating Methodology
2. Develop and Communicate Facility Ratings
3. Document SOL Methodology
4. Develop and Communicate SOLs
5. Document Transfer Capability Methodology
6. Document and Communicate Transfer Capabilities
![Page 4: Determine Facility Ratings, SOLs and Transfer Capabilities Paul Johnson Chair of the Determine Facility Ratings Standard Drafting Team An Overview of the.](https://reader035.fdocuments.us/reader035/viewer/2022081519/56649e045503460f94af0f02/html5/thumbnails/4.jpg)
Facility Ratings Methodology
Respects most limiting equipment rating Identify method of determining rating Consideration of:
• Manufacturer’s ratings
• Design criteria
• Ambient conditions
• Operating limitations
• Other assumptions
V0 only requires normal & emergency ratings &
doesn’t identify generators
End users need a ‘range’ of limits, only some of which
are ‘normal’ and ‘emergency’
V0 only requires normal & emergency ratings &
doesn’t identify generators
End users need a ‘range’ of limits, only some of which
are ‘normal’ and ‘emergency’
![Page 5: Determine Facility Ratings, SOLs and Transfer Capabilities Paul Johnson Chair of the Determine Facility Ratings Standard Drafting Team An Overview of the.](https://reader035.fdocuments.us/reader035/viewer/2022081519/56649e045503460f94af0f02/html5/thumbnails/5.jpg)
System Operating Limits Methodology
Cannot exceed Facility Rating How to identify IROLs In pre and post contingency state SOLs
provide:
• BES system stable (transient, dynamic, voltage)
• Facilities within Facility Ratings
• Facilities within thermal, voltage & stability limits
• Cascading outages & uncontrolled separation shall not occur V0 has no criteria for
developing SOLs used in operations horizon
V0 has no criteria for developing SOLs used in
operations horizon
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Which SOLs are Also IROLs?
Some IROLs can be identified in advance – some can only be identified in real-time
An IROL is an SOL that, if violated under certain conditions, could lead to one or more of the following:
• Cascading outages
• Uncontrolled separation
• Instability
V0 doesn’t require documenting
methodology for determining IROLs
V0 doesn’t require documenting
methodology for determining IROLs
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Transfer Capabilities Methodology
Respect all SOLs Consideration of:
• Transmission system topology
• System demand
• Generation dispatch
• Current and projected transmission uses
V0 has no criteria for developing Transfer
Capabilities
V0 has no criteria for developing Transfer
Capabilities
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Methodology Who Has or Develops?
Who Sees or Receives?
Facility Ratings Gen OwnersTrans Owners
PAs TPs
RCs TOPs
System Operating Limits
PAsRCs
PAs TPs
RCsTOPsTSPs
Transfer Capabilities
PAsRCs
RROsPAs TPs
RCsTOPsTSPs
Key Requirements & Responsible Functions
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Product Who Develops?
Who Receives?
Facility Ratings Gen OwnersTrans Owners
PAs TPs
RCs TOPs
System Operating Limits
PAs, TPsRCs, TOPs
PAs TPs
RCsTOPsTSPs
Transfer Capabilities
PAsRCs
RROsPAs TPs
RCsTOPsTSPs
Key Requirements & Responsible Functions
![Page 10: Determine Facility Ratings, SOLs and Transfer Capabilities Paul Johnson Chair of the Determine Facility Ratings Standard Drafting Team An Overview of the.](https://reader035.fdocuments.us/reader035/viewer/2022081519/56649e045503460f94af0f02/html5/thumbnails/10.jpg)
Proposed Changes to V0 Definitions
Cascading Outages
Contingency
Interconnection Reliability Operating Limit (IROL)
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Cascading Outages
V0: The uncontrolled successive failure of system elements triggered by an incident at any location within the Interconnection. Cascading results in widespread electric service interruption that cannot be restrained from sequentially spreading beyond an area predetermined by studies.
New: The uncontrolled successive loss of BES Facilities triggered by an incident (or condition) at any location resulting in the interruption of electric service that cannot be restrained from spreading beyond a pre-determined area.
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Contingency
V0: The failure, with little or no warning, of one or more elements of the transmission system. This includes, but is not limited to, generator, transmission line, transformer, and circuit breaker failures or misoperations.
New: The unexpected loss of one or more BES Facilities caused by a single initiating event.
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Interconnection Reliability Operating Limit (IROL)
V0: The value (such as MW, MVar, Amperes, Frequency or Volts) derived from, or a subset of the System Operating Limits, which if exceeded, could expose a widespread area of the Bulk Electric System to instability, uncontrolled separation(s) or cascading outages.
New: A System Operating Limit that, if violated, could lead to instability, uncontrolled separation, or Cascading Outages that adversely impact the reliability of the Bulk Electric System.
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Controversial Issues
Flexible planning & operating horizons Peer review Schedules for delivery set by recipients Table 1 Category C Events and SOLs Partial retirement of V0 Standards
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Planning & Operating Horizons
PlanningHorizon
Real Time
1 Year
Ahead
4 Years
Ahead
3 Years
Ahead
2 Years
Ahead
OperatingHorizon
Standard requires no gaps in times covered
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Planning & Operating Horizons
Defaults:
• Operating Horizon = real-time up to 1 yr
• Planning Horizon = 1 yr and beyond
OperatingHorizon
PlanningHorizon
Real Time
1 Year
Ahead
4 Years
Ahead
3 Years
Ahead
2 Years
Ahead
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Peer Review
Goal is to find a fair balance
• Owners rights versus impact on others
‘Allow’ but don’t ‘require’ peer review
Challenges must be documented & acknowledged
Threat of liability is motivator
Idea from Blackout Recommendations
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Schedules for Delivery . . .
. . . to those entities that have a reliability-related need for such … and make a written request that includes a schedule for delivery of such …
. . . to those entities that have a reliability-related need for such … and make a written request that includes a schedule for delivery of such …
If you need to send limits to several different entities - deliver to all entities according to the most limiting schedule
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Table 1 - Category C Events
Category C – (Loss of 2 or more Elements) applicable to planning studies with all facilities in service
In most real-time operations, one or more facilities already out of service - operate to protect the system from a 2nd (or 3rd or 4th…) contingency
SOLs established considering ‘Category C’ events would probably result in overly restrictive SOLs
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Partial Retirement of V0 Standards
V1 Standards started before V0 Standards
No 1-to-1 relationship between V0 and V1
Does partial retirement lead to confusion?
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Retirement of V0 Requirements
TOP-004 – Transmission Security
• Retire two requirements
FAC-004 – Methodologies for Determining Electrical Facility Ratings
• Retire entire standard
FAC-005 – Electrical Facility Ratings for System Modeling
• Retire entire standard
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R6. TOPs, individually and jointly with other TOPs, shall develop, maintain, and implement formal policies and procedures to provide for transmission reliability. These policies and procedures shall address the execution and coordination of activities that impact inter- and intra-Regional reliability, including:
• R 6.1. Equipment ratings.
• R 6.2. Monitoring and controlling voltage levels and real and reactive power flows.
• R 6.3. Switching transmission elements.
• R 6.4. Planned outages of transmission elements.
• R 6.5. Development of IROLs and SOLs.
• R.6.6. Responding to IROL and SOL violations.
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Effective Dates – (Compliance)
Assumes BOT Adopts November 1, 2005 Methodologies
• 6 months after BOT adoption - May 1, 2006
Ratings, Limits and Transfer Capabilities
• 2 months after methodologies – July 1, 2006
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Questions