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; dtucker@wecc.biz ). 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?