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Transmission Relay Loadability Transmission Relay Loadability FERC Order 733FERC Order 733Project 2010Project 2010--1313
NERC Relay Loadability StandardReliability Standards WebinaryNovember 23, 2010
2Project OverviewProject Overview
Standards InvolvedStandards Involved • PRC-023-2 Transmission Relay Loadability
A li bl E titi Aff t d Applicable Entities Affected • Functional Entities with Load-Responsive Phase
P t ti S tProtection Systems: Transmission Owners
G t O Generator Owners
Distribution Providers
Planning Coordinators• Planning Coordinators
3Project OverviewProject Overview
Applicable Facilities Affected Applicable Facilities Affected• Transmission lines operated at 200 kV and above
• Transmission lines operated at 100 kV to 200 kV as determined by the Planning Coordinator
• Transmission lines operated below 100 kV identified as critical facilities by the Regional Entity and as determined by the Planning Coordinatordetermined by the Planning Coordinator
4Project OverviewProject Overview
Applicable Facilities Affected (cont’d)Applicable Facilities Affected (cont d)• Transformers with low voltage terminals connected at
200 kV and above
• Transformers with low voltage terminals connected at 100 kV to 200 kV as determined by the Planning Coordinator
• Transformers with low voltage terminals identified as i i l f ili i b h R i l E i dcritical facilities by the Regional Entity and as
determined by the Planning Coordinator
5Project OverviewProject Overview
ScopeScope • On March 18, 2010, FERC issued Order No. 733
which approved Reliability Standard PRC-023-1 pp y– Transmission Relay Loadability, and also directed NERC to develop certain modifications to the PRC-023-1 standard through its Reliabilityto the PRC-023-1 standard through its Reliability Standards development process. PRC-023-2 is the first step toward satisfying Order 733.
6Project Schedule to CompletionProject Schedule to Completion
Second draft of PRC-023-2 standard posted on November 1, 2010 for a 45-day formal comment period with concurrent ballot during the last 10 days of the comment period
Comments and Ballot Results Close on December 16 2010 Comments and Ballot Results Close on December 16, 2010
Respond to Comments and Post Third Draft for Comment in January 2011y
Conduct Recirculation Ballot in February 2011
Ballot Completion Anticipated in February 2011
Expected NERC Board of Trustees Approval in February 2011
Submit to FERC for Approval in March 2011
PRC-023-2 – Summary Key Changes to Requirements 7y g q
R1 – Modified criterion 10 (transformer loadability) to address h 203 f O d 733paragraph 203 of Order 733
New R2 to address out-of-step blocking issues from paragraph 244
New R4 to require that entities provide a list of facilities using 15-New R4 to require that entities provide a list of facilities using 15minute ratings to PC, TOP, and RC per paragraph 186.
New R5 to require that entities using criterion 12 (set relays to protect lines and determine loadability from settings) provide a list ofprotect lines and determine loadability from settings) provide a list of such facilities to Regional Entity per paragraph 224.
Modified old R3 (now R6) to use Attachment B criteria
New R7 to provide for systemic implementation of standard for facilities determined per R6
PRC-023-2 – Change to R1, Criterion 108
Relay Loadability for Transformersy y• Previously required load responsive relays to generally meet R1
• Order 733, paragraph 203 directed modification to verify the equipment is capable of sustaining the overload Two components to transformer withstand capability (IEEE C37.91
and IEEE C57.102)
– Thermal – defined for currents over 2 x rating, times up to 30 minutes
– Mechanical – based only on impedance – times from 2 seconds– Mechanical – based only on impedance – times from 2 seconds to eight seconds
Requirement modified to require that the transformer fault protection address the mechanical withstand characteristicaddress the mechanical withstand characteristic
PRC-023-2 - R1 Criterion 10 Change9
Transformer withstand per IEEE C37.91 and C57.102• Thermal withstand curve
Provide for operator response Provide for operator response
If protection is desired, apply devices designed for that purpose, with appropriate timing response
• Mechanical Withstand curve Addressed within standard
PRC-023-2 – New R2 (Out-of-Step Blocking - OSB) 10( p g )
Attachment A previously specified that OSBAttachment A previously specified that OSB needed to be considered• If OSB is asserted by load conditions when a faultIf OSB is asserted by load conditions when a fault
occurs, it will prevent fault protection from operating
Order 733 paragraph 244 directed that OSB beOrder 733, paragraph 244 directed that OSB be added as an additional requirement
“shall verify that its out of step blocking elements shall verify that its out-of-step blocking elements allow tripping … for faults that occur during the loading conditions used … per R1.”loading conditions used … per R1.
PRC-023-2 – New R4 List of Facilities Using 15-Minute Rating 11g g
R1, criterion 2 provides a smaller margin if entities are , p gusing a 15-minute rating• Clarified in footnote 2 to address 15-minute ratings used for
t tisystem operations
• Commits entities to 15-minute response to impending ratings violations
Order 733, paragraph 186 directed that entities by required to provide a list of such facilities to TOPs.
R4 requires that the list be provided annually to the TOPs, and adds Planning Coordinator and Reliability Coordinator to listCoordinator to list
PRC-023-2 – New R5 List of Facilities using R1 Criterion 12 12g
R1 criterion 12 provides that entities shall setR1 criterion 12 provides that entities shall set their relays to protect their facilities and develop an associated rating if they are unable to apply any other criteria
Order 733, paragraph 244 directs that the list of , p g pfacilities using criterion 12 be available to users, owners, and operators of the BPS
R5 requires that the list be provided annually to the Regional Entityg y
PRC-023-2 – R6 Use Attachment B Criteria 13
Previous R3 required that Planning Coordinators have t d t i f iliti “ iti l t th li bilita process to determine facilities “critical to the reliability
of BES”, maintain a list of such facilities, and provide the list
Order 733 directs that NERC develop the criteria
R6 now requires that the Planning Coordinators apply q g pp ythe criteria annually to 100-200 kV facilities and to sub-100 kV facilities identified as critical facilities in the Regional Entity Compliance RegistryRegional Entity Compliance Registry• If Attachment B Criterion B4 is used, include the year studied• Provide the list of identified facilities to all RE, RC, TO, GO, and
DP i hi i Pl i C di i hi 30 dDP within its Planning Coordinator area within 30 days
PRC-023-2 – New R7 – Systemic Implementation for sub-200 kV Facilities 14p
PRC-023-1 provided for ongoing implementationPRC 023 1 provided for ongoing implementation for sub-200 kV facilities (per old R3) within Implementation Plan• Not an effective approach – Implementation Plan is
only for initial implementation of new Standard, not for ongoing compliance
New R7 to require that TO, GO, and DP implement R1, R2, R3, R4, and R5 for facilities identified per R6 within 24 months
15Modifications to Attachment AModifications to Attachment A
Order No. 733 ¶264 directed modifications to Att h t A t i l d i i l l tAttachment A to include supervising relay elements
The Order specifically discussed concerns with pilot wire and current differential protection systems p ysupervised by fault detector relays
A new Section 1.6 in Appendix A was added to address this concernthis concern
The proposed revision makes PRC-023-2 applicable to the following protective functions:• Supervisory elements associated with current-based,
communication-assisted schemes where the scheme is capable of tripping for loss of communicationsp pp g
16Addition of a New Attachment BAddition of a New Attachment B
Order No. 733 ¶69 directed inclusion of a test that Pl i C di t t t d t i h thPlanning Coordinators must use to determine whether a sub-200 kV facility is critical to reliability of the Bulk-Power System
The “Applicability Test” contained in Attachment B will be used by Planning Coordinators to determine which sub-200 kV transmission Elements must comply with this200 kV transmission Elements must comply with this standard
The test will be applied to:The test will be applied to:• All facilities 100 kV to 200 kV
• Facilities below 100 kV identified by the Regional Entity as y g ycritical facilities for the purposes of the Compliance Registry
17
Circuit must comply with the standardCircuit must comply with the standardif any of the following criteria apply:if any of the following criteria apply:y g pp yy g pp y
Monitored Elements of:• A flowgate in the Eastern Interconnection,
• A major transfer path within the Western Interconnection as defined by the Regional Entity, or
• A comparable monitored Element in the Texas Interconnection or Québec Interconnection,that have been included to address long-term reliability concerns, as g y ,confirmed by the applicable Planning Coordinator.
Monitored Elements of an IROL where the IROL was determined in the long term planning horizondetermined in the long-term planning horizon
Circuits that form a path (as agreed to by the plant owner and the Transmission Entity) to supply off-site power to nuclear y) pp y pplants
18
Circuit must comply with the standardCircuit must comply with the standardif any of the following criteria apply: (cont.)if any of the following criteria apply: (cont.)y g pp y ( )y g pp y ( )
Circuits identified through defined power flow analysis: • Simulation of double contingency combinations selected by engineering
judgment in TPL-003 Category C3, but without manual system adjustments between contingencies
• Evaluation of the post-contingency loading of 100 kV to 200 kV circuits to identify circuits loaded greater than a specified percentage above the Facility Rating nearest a four-hour duration
115% f th F ilit R ti if b d l di d ti f t d i l di f 115% of the Facility Rating, if based on a loading duration of up to and including four hours
120 % of the Facility Rating, if based on a loading duration greater than four and up to and including eight hours
130% of the Facility Rating, if based on a loading duration of greater than eight hours
• Radial circuits serving only load are excluded.
Circuits that the Planning Coordinator may include based on Circuits that the Planning Coordinator may include based on other technical studies or assessments
19Implementation PlanImplementation Plan
The Implementation Plan for the revised pstandard provides varying amounts of time based on the nature of each Requirement
Footnote 1 pertaining to Temporary Exceptions approved prior to approval of PRC-023-1 has been removed as directed in ¶284been removed as directed in ¶284• This has no impact on applicable entities because the
Temporary Exceptions have expiredTemporary Exceptions have expired
• The latest due date for mitigation of temporary exceptions under the Beyond Zone 3 review wasexceptions under the Beyond Zone 3 review was December 31, 2008
20Implementation Plan (cont.)Implementation Plan (cont.)
Facility owners1 must comply with existing criteria in R1 upon approval 2 andupon approval,2 and• Must comply with the addition to criterion 10 pertaining to
transformer fault protection within 12 months,2 andP t ti f ti d ib d i th ti 1 6 f• Protective functions described in the new section 1.6 of Attachment A must comply with R1 within 24 months2
Facility owners1 must comply with R2 and R3 upon l2approval2
• R2 already is enforceable as section 2 of Attachment A in PRC-023-1
• R3 already is enforceable as R2 in PRC-023-1 1 Transmission Owners, Generator Owners, and Distribution Providers as described in
the Applicability section of PRC-0232 Measured from the first day of the first calendar quarter after applicable regulatory
approvals or in those jurisdictions where regulatory approval is not required, the first day of the first calendar quarter after Board of Trustees adoption
21Implementation Plan (cont.)Implementation Plan (cont.)
Facility owners1 must comply with R4 and R5 within 6 th 2months2
Planning Coordinators comply with R6 (apply the criteria in Attachment B) within 18 months2)
Requirement R7 is effective upon approval;2 however, R7 provides facility owners1 at least 24 months to meet R1 – R5 following notification by the Planning Coordinator that a sub-200 kV Facility must comply with this standardthis standard
1 Transmission Owners, Generator Owners, and Distribution Providers as described in the Applicability section of PRC-023
2 Measured from the first day of the first calendar quarter after applicable regulatory2 Measured from the first day of the first calendar quarter after applicable regulatory approvals or in those jurisdictions where regulatory approval is not required, the first day of the first calendar quarter after Board of Trustees adoption
22SummarySummary
Overview of Key Changes to PRC-023-2 to Satisfy Directives in FERC Order 733Satisfy Directives in FERC Order 733
PRC-023-2 Posted for Formal Comment with Concurrent Ballot Close on December 16 2010Concurrent Ballot Close on December 16, 2010
Webinar Provided as Outreach to Industry
Target Submittal to NERC BOT in February 2011
Submit to FERC for Approval in March 2011 Submit to FERC for Approval in March 2011
Implementation Plan provides varying amounts f ti b d th t f h R i tof time based on the nature of each Requirement
Information Link Information Link Transmission Relay Loadability, Project 2010Transmission Relay Loadability, Project 2010--1313 23y y jy y j
Information Link to NERC Website• http://www.nerc.com/filez/standards/Project_2010-
13_Summary_Table.
Charles Rogers SDT Chair Affiliation Charles Rogers, SDT Chair, Affiliation
Phil Tatro, SME & Advisor, NERC Staff
Joe Bucciero, NERC Project Coordinator
• joe bucciero@gmail [email protected]
24
??Questions
andand
Answers
Closing and AdjournClosing and Adjourn25
Register for the Ballot PoolRegister for the Ballot Pool
Provide Constructive Comments
Offer alternative language where possible
Thank you.
