Transmission Reliability

Community Insights Conference

August 19-21, 2015

Minneapolis, MN

2015 Electric T&D Benchmarking

2

Agenda

◼ Overview Highlights for 2015 Transmission Reliability Benchmarking

◼ Performance Profiles & Trends Profile Measures, 2015 vs 2014

◼ 2015 Benchmarking Results Reliability Improvement Initiatives Analysis of Sustained Outage Causes Profile Trends

Overview

Highlights for 2015

◼ Improvement initiatives are focusing on improved processes, design changes, and increased maintenance. Vegetation management was mentioned more often this year than last.

◼ A significant percentage of sustained outages come from causes that can be considered “preventable”.

◼ We now have five years of relatively complete history of the Profile Metrics for Transmission Reliability. Most measures are either stable or improving; there is no clear trend.

4

Transmission Line Reliability

Statistics◼ In general, for transmission lines, we are interested in availability, as impacted

by sustained outages that may or may not have an impact on an end-use customer.

◼ We ask for raw data on outages by voltage class. We have aligned the definitions with TADS for all voltages (even though TADS only applies to 200kV and above) Cause codes for all voltages based upon TADS “Automatic” operation replaces the terminology “unplanned” (with minor

impact on the values)◼ We have only asked for “automatic” outage data◼ Those codes that are “substation related” are reported in transmission lines, but

also in the used for profile measures in the substation section of the report◼ For Transmission reliability the term “outage” refers to a ‘component’ or line

outage (most of which may not have any customer impact).  For instance, you might have had 10 transmission component outages last year but only 3 of them resulted in an outage to a customer.

5

Profiles & Trends

Transmission Reliability Profile

7

2014YE 2013YE  Mean Q1 Q2 Q3 Bars Mean Q1 Q2 Q3 BarsTransmission Line Outages    Element Sustained Outage Frequency -- <200kV 0.19 0.04 0.13 0.29 11 0.28 0.07 0.11 0.31 11Element Momentary Outage Frequency Rate -- <200kV 0.37 0.14 0.20 0.54 11 0.62 0.18 0.25 0.81 11Circuit Sustained Outage Frequency, Mileage Adjusted <200kV 1.94 0.98 1.86 2.92 11 2.29 1.02 2.20 3.19 11

Element Sustained Outage Duration Time <200kV 3.77 0.36 1.08 3.73 12 2.78 0.12 1.32 4.83 12Percentage of Elements with Zero Automatic Outages <200kV 0.66 0.85 0.72 0.54 10 0.64 0.83 0.67 0.46 10

   Element Sustained Outage Frequency -- >200kV 0.28 0.08 0.18 0.32 12 0.26 0.04 0.13 0.41 12

Element Momentary Outage Frequency Rate -- >200kV 0.38 0.11 0.22 0.58 12 0.31 0.13 0.31 0.33 12

Circuit Sustained Outage Frequency, Mileage Adjusted -- >200kV 0.84 0.38 0.59 0.89 12 0.73 0.36 0.60 0.90 12

Element Sustained Outage Duration Time >200kV 6.16 0.72 1.60 3.05 12 2.59 0.06 0.89 4.23 12

Percentage of Elements with Zero Automatic Outages >200kV 0.70 0.84 0.74 0.54 12 0.76 0.91 0.78 0.68 12

Most Measures are somewhat improved for <200kV, somewhat worse for >200kV

< 200kv measures

9

Sustained Outage Frequency Rate (SOF) < 200kv

Results much better than last year

Mean 0.29Quartile 1 0.07Quartile 2: 0.18Quartile 3: 0.42

This YearTransmission Reliability Report Page 4, Question TR15, ST120

Last Year

Mean 0.19Quartile 1 0.05Quartile 2: 0.15Quartile 3: 0.29

10

Momentary outage frequency (MOF) < 200kv

Better this year, except first quartile

Mean 0.57Quartile 1 0.12Quartile 2: 0.24Quartile 3: 0.74

Mean 0.36Quartile 1 0.15Quartile 2: 0.20Quartile 3: 0.50

This YearTransmission Reliability page 5, Questions TR15. ST120

Last Year

11

Sustained Outage Frequency, Mileage Adjusted (SCOF100ctmi) < 200kv

Results are considerably worse than last year

Mean 2.49Quartile 1 1.03Quartile 2: 2.35Quartile 3: 3.69

Mean 5.18Quartile 1 3.34Quartile 2: 4.75Quartile 3: 6.41

This YearTransmission Reliability page14, Questions TR15. ST120

Last Year

12

Sustained Outage Duration Time (SODT) <200kv

Mean and top quartile are about the same; 2nd and 3rd quartile much better

Mean 3.32Quartile 1 0.26Quartile 2: 1.89Quartile 3: 5.53

Mean 3.50Quartile 1 0.29Quartile 2: 0.82Quartile 3: 2.22

This YearTransmission Reliability page 9, Questions TR5. ST120

Last Year

13

Percent Of Circuits With Zero Interruptions (PCZO) < 200kv

Much better than last year.

Mean 68.01 %Quartile 1 87.50 %Quartile 2: 76.12 %Quartile 3: 57.50 %

Mean 64.14 %Quartile 1 83.20 %Quartile 2: 66.50 %Quartile 3: 46.48 %

This YearTransmission Reliability page 25, Questions TR45

Last Year

> 200kv measures

15

Sustained Outage Frequency Rate (SOF) > 200kv

Results are a bit worse than last year

Mean 0.22Quartile 1 0.03Quartile 2: 0.08Quartile 3: 0.38

This YearTransmission Reliability Report Page 7, Question TR15, ST120

Last Year

Mean 0.27Quartile 1 0.09Quartile 2: 0.17Quartile 3: 0.32

16

Momentary outage frequency (MOF) > 200kv

Somewhat worse this year, except 3rd quartile

Mean 0.28Quartile 1 0.09Quartile 2: 0.29Quartile 3: 0.33

Mean 0.38Quartile 1 0.11Quartile 2: 0.22Quartile 3: 0.58

This YearTransmission Reliability page 8, Questions TR35. ST120

Last Year

17

Sustained Outage Frequency, Mileage Adjusted (SCOF100ctmi) > 200kv

Results are somewhat worse than last year, especially the first quartile

Mean 0.63Quartile 1 0.17Quartile 2: 0.51Quartile 3: 0.75

Mean 0.84Quartile 1 0.42Quartile 2: 0.61Quartile 3: 0.83

This YearTransmission Reliability page 17, Questions TR15. ST120

Last Year

18

Sustained Outage Duration Time (SODT) >200kv

Results much worse than last year, except 3rd quartile

Mean 2.04Quartile 1 0.01Quartile 2: 0.19Quartile 3: 3.91

Mean 5.69Quartile 1 0.27Quartile 2: 1.21Quartile 3: 2.81

This YearTransmission Reliability page 11, Questions TR5. ST120

Last Year

19

Percent Of Circuits With Zero Interruptions (PCZO) > 200kv

Not as good as last year.

Mean 70.97 %Quartile 1 83.90 %Quartile 2: 78.95 %Quartile 3: 54.00 %

Mean 76.44 %Quartile 1 90.60 %Quartile 2: 78.48 %Quartile 3: 68.43 %

This YearTransmission Reliability page 26, Questions TR45

Last Year

initiatives

21

Successful Practices to Improve Reliability for Circuits

Better Maintenance 27,37,18,25,17Design Changes 38,40,23Process Improvement 38

ID Response

38

Installing TWS automatic fault locating. Developing subgrade corrosion inspection and mitigation program with EPRI. Installing new EPRI-specified, high contamination coastal insulator designs developed in partnership with alliance manufacturers. Installing EPRI Insulator Contamination Monitoring System in contaminated coastal and industrial areas to indicate when washing is required to prevent flashovers

21ISO:9000 implementation, Identifying poor performing transmission circuits, adding a smart digital (ION) metering system, improve maintenance programs

23System upgrades, situational awareness, CCVT replacement

27 Reviewing lightning protection practices, use of IR and Corona for transmission patrols

37 Identify trends in outages to replace material most likely to fail

18 Expanded use of lightning arrestors, shunting of compression fittings, use of UAV for improved inspection

25 Not new, but we have an infrustructure replacment program, focused on key assets and asset types

17Utilizing LIDAR Survey Technology to evaluate ROW Condition, Sharing GIS switch location data with Member System personnel, andAnnual determination of the 10 worst performing lines for project development

Transmission Reliability Page 33, Question TR70

Successful Practices Used To Reduce Frequency and Duration Of Outages

22Transmission Reliability Pg 26

Source: TR50

Category Frequency Duration

Better Maintenance 38,32,21,27,37,17 38,21,27,37

Increased or Enhanced Vegetation Management

32,21,23,37,31,18,17

Design Changes 38,21,18 38,27,18,17

Root Cause Analysis 33 33,21

Process Changes 32,25 21,23,25,17

Detailed Results of these Questions are presented in the report (pages 31,32). Below is a summary of the categories of the results

analysis

24

Transmission reliability Trends <200kV

Most measures are improving except Momentary Outage Frequency Rate, which is relatively unchanged.

25

Transmission reliability Trends >200kV

Most measures are trending better. Momentary Frequency and Sustained Outage Duration Time are relatively flat.

26

Total reported sustained outage events from all respondents

The bars shown in RED can be considered “preventable”, along with perhaps a few others. The four bars shown in RED account for almost 47% of all sustained outages.

Total Events = 215

Thank you for your Input and Participation!

27

Corporate Offices

California

400 Continental Blvd. Suite 600El Segundo, CA 90245(310) 426-2790

Maryland

3 Bethesda Metro Center Suite 700Bethesda, MD 20814

Ken Buckstaff Ken.Buckstaff@1QConsulting.com310-922-0783

Debi McLain CookDebi.McLain@1QConsulting.com760-272-7277

New York | Texas | Wyoming | Wisconsin

Dave CanonDave.Canon@1QConsulting.com817-980-7909

Dave WeilerDavid.Weiler@1QConsulting.com607-761-6778

Your Presenters

First Quartile Consulting is a utility-focused consultancy providing a full range of consulting services including continuous process improvement, change management, benchmarking and more. You can count on a proven process that assesses and optimizes your resources, processes, leadership management and technology to align your business needs with your customer’s needs.

Visit us at www.1stquartileconsulting.com | Follow our updates on LinkedIn

About 1QC

Satellite Offices

Dave CarterDavid.Carter@1QConsulting.com414-881-8641