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Doug Tucker of WECC& Milorad Papic of IPC
2012 TRD/TADS WebinarOctober 23, 2012
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o General Overview – Milorad Papic , IPCo Modified WECC TPL-001-WECC-CRT-2 System Performance
Criterion effective since April 1, 2012 - Milorad Papico An update on current activities of WECC RS – Milorad Papico Cooperation between RPEWG and NERC in performing
statistical analysis using TRD outage and inventory data – Milorad Papic
o Common Tower versus Common Corridor – Milorad Papico WECC 2012 State of the Interconnection Report – Doug
Tucker o Data Correlation to PRC – Doug Tuckero Joint Ownership – Doug Tuckero Conclusion – Doug Tucker
WECC TRD and NERC TADS
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RPEWG (Reliability Performance Evaluation Work Group)
WECC TRD (Transmission Reliability Database)
NERC TADS (Transmission Availability Data System)
TRD vs. TADS
General Overview
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PMWG was formed as a RS Working Group in June 1996.
In a 1996 WSCC survey indicated that 90% of member utilities expressed interest in a development of some type of probabilistic based reliability criteria.
In 1998 PCC approved the PBRC development framework and Phase I Implementation Plan.
PBRC Phase I development and implementation of event probabilities into Performance Table (Table W-1) was completed.
Ultimate goal is to produce a more economically efficient system without sacrificing system reliability.
RPEWG - History
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TRD started as a sub group of the Reliability Subcommittee Spring 2004
WECC PCC - OC 2005, requested to re-tool for attributes
Formed TRDTF in Fall 2005
WECC PCC, OC and Board approved it in Fall of 2006
RPEWG merged with TRDTF as a new RPEWG
sometimes in the end of 2006
RPEWG - History
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RPEWG - History
RPEWG was initially formed as a PCC Working Group .
RPEWG has started to play new role as result of new NERC Reliability standards and WECC Reliability Criteria as well as the creation of a new WECC outage data system TRD.
RPEWG was merged with TRD Task Force in 2006.
RPEWG past Chairs: James Leigh-Kendall (SMUD), John Leland (NWE) and Brian Keel (SRP)
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RPEWG – Scope of Work
Develops processes to implement probabilistic-based reliability criteria
Reviews requests for performance category adjustments
Monitors facility outage data and recommends category adjustments
Maintains the Performance Level Adjustment Record
Define facility outage data reporting requirements and making recommendations to the RS on reliability performance level.
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Members of the RPEWG (includes WECC Staff as Members of RPEWG) only have access to raw outage data
RPEWG Members listed on the WECC website
Access to data governed by RPIC, Approved Exhibit C
Raw outage performance compared to criteria of WECC Performance Criteria Table W-1
RPEWG Membership & Activities
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Purpose of TRD
Provides a common format for outage data submittal to WECC and NERC
Provides a transmission outage database for PCUR (Performance Category Upgrade Requests)
Provides database to monitor, evaluate and report WECC transmission lines & transformers performance
Provides pool of reliable outage statistics to assess impact of various variables such as: environmental conditions, equipment type, voltage class, age etc).
Enables Benchmark data with other data sources (NERC, CEA, CIGRE, SGS, Companies database, etc.)
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Transmission Circuit Attribute Table
Same as last year; Miles, Type, Voltage, Conductors per Phase, Overhead Ground Wires, Insulation Type, Cable Type, Structure Materials, Structure Types, Circuits per Structure, Terrain Exposure, Elevation Exposure.
Transformer Attribute Table
Same as last year; High and Low Side kV, Single or Multi, Rating.
TRD Sheets
TRDTransmission Reliability Data
Standard Statistical Reports
PerformanceReports
Customized Reports
TRD COLLECTION SCHEME
.
.
Utility 1
Utility 2
Utility 3
Utility nNERCTADS 11
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TADS (TRD) overview
NERC wide data collection
AC circuits >= 200kV
Transformers Low Side >= 200kV
AC/DC Back to Back Converters >= 200kV AC Voltage
DC Circuits >= +/-200kV
NERC TADS
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TADS Metrics Calculated:
Inventory of AC & DC Equipment
Circuit & Transformer Outage F & D per outage initiation code
Circuit Sustained and Momentary Outage Metrics, Element or Other Initiated
NERC TADS
Data Submittal & Review
TO Submits Data to WECC
WECC
WECC REVIEW TOs DATA• Check TO Data•Assign Event ID Codes for Events affecting more than one TO
NERC
NERC REVIEW WECC DATA• Check WECC and other RE Data•Assign Event ID Codes for Events affecting more than one RE •Fills in missing data on whether an outage triggered a disturbance report
WECC submit reviewed TADS data to NERC
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TRD Data Differences:Focus on Common Corridor Outages (RPEWG)
Physical Attribute Data Inputs
Circuits Outage Rates per
Conductors per Phase
Number of Ground Wires
Insulator Type
Structure Material
Structure Type
Terrain Exposure
Elevation Range
TRD and TADS Differences
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The modified WECC TPL System Performance Criteria was approved by the WECC BOD December 1, 2012 and has an effective date of April 1, 2012. Modifications include:
Modified the definition of Adjacent Transmission Circuits is now included in the “WECC Glossary of Terms”
Removed the definition for Common Corridor
Modified the applicability of the Adjacent Circuits Requirement R1.1
TPL-001-WECC-CRT-2 System Performance Criteria
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Purpose: System simulations and associated assessments are needed periodically to ensure that reliable systems are developed that meet specified performance requirements with sufficient lead time, and that systems continue to be modified or upgraded as necessary to meet present and future system needs.
Applicability
* Applies to only Adjacent Transmission Circuits where both circuits are greater than or equal to 300 kV.
* Applies to effects on facilities external to a Transmission Planner area.
* Does not apply to Adjacent Transmission Circuits that share a common right-of-way for a total of three miles or less, including – but not limited to – substation entrances, pinch points, and river crossings.
TPL-001-WECC-CRT-2 System Performance Criteria
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A. Requirements
R1. In addition to NERC Table 1, each Planning Coordinator and Transmission Planner shall comply with WECC’s Disturbance-Performance Table (Table W- 1) of Allowable Effects on Other Systems and Part 1.1–1.4, contained in this section, when planning the Transmission System in the Western Interconnection.
1.1. The NERC Category C5 initiating event of a single-line-to-ground fault with normal clearing shall also apply to the common mode contingency of two Adjacent Transmission Circuits on separate towers — unless the Mean Time Between Failure (MTBF) is determined to be greater than 30 years (i.e., outage frequency is less than 0.033 outages per year).
R5. For any event that has actually resulted in cascading, action must be taken so that future occurrences of the event will not result in cascading; or it must demonstrate that the Mean Time Between Failure (MTBF) is greater than 300 years (frequency less than 0.0033 outages/year) and approved by PCC.
5.1. Any contingency adjusted to Category D must not result in a cascading outage unless the MTBF is greater than 300 years (frequency less than 0.0033 outages/year); or the initiating disturbances and corresponding impacts are confined to either a radial system or a local network.
TPL-001-WECC-CRT-2 System Performance Criteria
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WECC Table W-1
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TRD Outage Data Collection
Planning and Operations Criteria Differences
Impact of high Transfer for Adjacent Circuits
Composite Load Model Impacts
Performance Criteria Upgrade Request Process
Variable Generation Study
An Update on Current RS Activities
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Overview of WECC Transmission Reliability Databaseo Inventoryo Outages
AC circuit outages: Distribution study
Transmission circuit attributes as explanatory variables for the number of outages (the outage rate)
Correlation analysis and hierarchy of the numerical explanatory variables for the number of outages
Remarks on statistical analysis for character attributes
Presentation by Svetlana Ekisheva is available on WECC web site under RPEWG
NERC & RPEWG Cooperation in performing statistical analysis of TRD outage & inventory data
CRW
COT Common Tower & Common Right of Way
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2011 WECC State of the interconnection
Transmission Line Circuit Miles - AC Voltage (kV)
AC Voltage
100-120 121-150 151-199 200-299 300-399 400-599Total AC Miles
120,385Line Miles
27,845 16,616 3,475 41,311 10,146 20,992
Table 1: Transmission Line Circuit Miles - AC Voltage (kV)
Transmission Line Circuit Miles - ± DC Voltage (kV)
DC Voltage200-299 300-399 400-599 600+
Total DC Miles1,744Line Miles 147 0 1,333 264
Table 2: Transmission Line Circuit Miles - +/- DC Voltage (kV)
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Transmission Circuits Frequency
Figure 1: Frequency of Outage Duration 2011
Momentary < 1 Minute
1 - 5 Minutes 5 - 10 Minutes 10 - 30 Minutes 30 - 60 Minutes Sustained > 60 Minutes
0
50
100
150
200
250
300
350
400
343
225
55 57
27
236
97114
13 19 18
6377
50
16 25 15
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Outage Duration for 2011 by Voltage Class
200-299 kV 300-399 kV 500-599 kV
Nu
mb
er o
f O
uta
ges
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Percent Distribution of Outages
Figure 2: Causes of Transmission Outages for 2011, All Voltages
Failed
AC C
ircuit
Equ
ipmen
tFire
Other
Failed
AC S
ubst
ation
Equ
ipmen
t
Wea
ther
, exc
luding
light
ning
Light
ning
Unkno
wn
Failed
AC/D
C Ter
mina
l Equ
ipmen
t
Power
Sys
tem
Con
dition
Human
Erro
r
Veget
ation
Failed
Pro
tect
ion S
yste
m E
quipm
ent
Vanda
lism
, Ter
roris
m, o
r Mali
cious
Act
s
Foreig
n In
terfe
renc
e
Conta
mina
tion
Enviro
nmen
tal
Failed
DC C
ircuit
Equ
ipmen
t0.00
1000.002000.003000.004000.005000.006000.00
Transmission Availability Data SystemCauses of Transmission Outages
All Voltages
2011 200-299 kV 300-399 kV 500-599 kV
Ou
tag
e D
ura
tio
n -
Ho
urs
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Data Gathering Discussion and results
• Outages with the same element ID that occur within 1-5 minutes of each other need separate event IDs
• Joint owners – need to report only the lines you are responsible for according to form 2.1
• Correlation to PRC-003-WECC-CRT-1 (Misoperation Report) and Disturbance reports
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• WECC converts the TRD data into the NERC forms 3.1, 3.2, 3.4, 4.1 4.2 4.3, 5.0, 6.1, 6.2, 6.3, 6.4
• Upload the data onto the NERC database• WECC takes the additional data and
creates the TRD report which will give us an insight on any patterns that will arise
• WECC State of the Interconnection Report
WECC Data Handling
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• NERC has asked the TO’s to correlate with each other on who is reporting the information for their jointly owned lines
• TO A and TO B must be reporting jointly owned lines on Form 2.1 and indicating who is the reporting TO even if TO B owns 1% of the line and TO A owns 99% of the line
Joint Owner Form 2.1
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Form 2.1
TO-SRP
TO-SCE
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• NERC Glossary of Terms (updated 4/20/2010) defines Misoperation as;o “Any failure of a Protection System element to operate within the
specified time when a fault or abnormal condition occurs within a zone of protection.
o Any operation for a fault not within a zone of protection (other than operation as backup protection for a fault in an adjacent zone that is not cleared within a specified time for the protection for that zone).
o Any unintentional Protection System operation when no fault or other abnormal condition has occurred unrelated to on-site maintenance and testing activity.”
• For each sample ‘Misoperation Cause’ below, based on the current ‘TADS Cause Code’ definitions, the following ‘Cause Codes’ should be used on Form 4.x ;
Misoperation Cause Codes
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Mapping of Misoperation
Misoperation Cause TADS Cause Code
Field/Physical Execution Error - Human Error
Engineering/Design Issue/Error‐ Settings - Human Error
‐ Design - Human Error (if NERC Registered Entity staff or Entity design contractor make the error)
‐ Design - Failed Protection System Equipment (if Equipment Vendor made a design error)
Relay Failure - Failed Protection System Equipment
Relay condition - Failed Protection System Equipment
Substation AC Failure - Failed AC Substation Equipment (if failed on the primary insulation side > 200 kV)- Failed Protection System Equipment (if failure on secondary side of relay PT, relay
control system, Current Transformer core, etc.)
Substation DC 120/240 V - Failed Protection System EquipmentPower/Control Failure
Communication Failure - Failed Protection System Equipment
SCADA Control
- Human Error (if NERC Registered Entity staff or Entity contractor make the error)
Mapping of Sample Misoperation Causes to "Equivalent" TADS Cause Codes
- Other (Use 'Other' if SCADA Control equipment failed.) (Not to be coded as Failed Protection System Equipment)
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• TOs are responsible for data quality. Each Regional Entity Coordinator (REC) or Designated Regional Entity Coordinator (DRE) is available to assist TOs (Doug Tucker; [email protected] ). o Form 1.1 & 1.2 contact updates & checklist of Formso Form 2.x “Multi-Owner” reporting coordination
single TO is responsible for TADS reporting of outages AND inventory.
o Coordinate common Event ID code for TADS Events affecting more than one TO. Enter a TADS “NERC Company” Event ID code.
o Coordinate evaluation of AC Circuit outages on common structures when the circuits are owned by different TOs.
o Prior to March 1st, TOs should reconcile their TADS reported outages with outages to be reported in PRC and EOP required reports.
o Prior to March 1st, TOs should review their TO webTADS “Reports” for outage & inventory data consistency & completeness.
Responsibilities for Each TO
*TADS Training 11-02-2010 Part A v5.ppt
Questions?