© 2015 Electric Power Research Institute, Inc. All rights reserved.

Dr. Andrew Phillips

Transmission &

Substations Area

Research Priorities

2© 2015 Electric Power Research Institute, Inc. All rights reserved.

EPRI T&S Asset Management

EP

RI

3© 2015 Electric Power Research Institute, Inc. All rights reserved.

Transmission and Substations Programs

P35 Overhead Transmission

• Asset Management -Decision

Bases

• Reference Books

• Design

• Lightning and Grounding

• Increased Power Flow

• Live Working

P37 Substations

• Asset Management Decision

Bases

• Reference Books

• Fleet Management

• Physical Security

P36 Underground• Asset Management Decision

Bases

• Reference Books

• Design and Construction

• Pipe Type Cables

• Extruded Cable

P162 HVDC

• New Applications of HVDC

• Electrical Effects

• Planning

4© 2015 Electric Power Research Institute, Inc. All rights reserved.

T&S Issue Based Initiatives

Unmanned Airborne

Systems (UAS)

- Physical Security

- EMP

- GMD

- Severe Weather

Transmission Grid Resiliency

Asset Management Analytics

5© 2015 Electric Power Research Institute, Inc. All rights reserved.

Transmission and Substations

2016 Participating Organizations

2016 YTD Funding - $24.4M 2016 YTD Deliverables

Task Force Engagement:710 Attendees YTD

$18.2 $19.2 $20.6

$6.7 $4.6 $3.6

$1.3 $0.2 $0.2

$-

$5.0

$10.0

$15.0

$20.0

$25.0

$30.0

2014 2015 2016 YTD

Fu

nid

ng

in

$ m

illi

on

Gov

SUP

ARP

638

782

710

0

100

200

300

400

500

600

700

800

900

2014 2015 2016 YTD

# o

f A

tte

nd

ee

s

US, 59

Canada, 4

International, 9

US

Canada

International

72 Funders

0

20

40

60

80

100

120

140

160

180

200

2014 2015 2016 YTD

# o

f D

eli

ve

rab

les

Planned Delivered Missed To Deliver

6© 2015 Electric Power Research Institute, Inc. All rights reserved.

HVDC

Intersection between T&S & GOP

Protection & Control

Asset Management Analytics

Ratings

TOV - MAD

Advanced Sensors

7© 2015 Electric Power Research Institute, Inc. All rights reserved.

Geomagnetically Induced Current (GIC)

Traditional Sensing Location

GIC Currents

Energized RF Sensor Location

8© 2015 Electric Power Research Institute, Inc. All rights reserved.

Geomagnetically Induced Current (GIC)

Test Results

141.9187.9

235.3

282.1

331.1376

426

0.4

-146.7

-195.6

-243.8

-294.8

-346.2

-393.2

-500

-400

-300

-200

-100

0

100

200

300

400

500

-400 -300 -200 -100 0 100 200 300 400

Se

ns

or

Rep

ort

ed

Am

ps

Actual Amps DC

9© 2015 Electric Power Research Institute, Inc. All rights reserved.

38 Active EPRI Member RF Sensor Demonstration Sites

+ 2 GIC Planning

9

GIC

GIC

10© 2015 Electric Power Research Institute, Inc. All rights reserved.

Impact of OSHA MAD Rules at a Glance…

OSHA Values Until 1st April, 2015 OSHA Values After 1st April, 2015

Grid Voltage Max Overvoltage Grid Voltage Max Overvoltage

<362.0 kV 3.0 pu 72.6 to 420 kV 3.5 pu (+0.5 pu)

500 to 550 kV 2.4 pu 420.1 to 550 kV 3.0 pu (+0.6 pu)

765 to 800 kV 2.0 pu 550.1 to 800 kV 2.5 pu (+0.5 pu)

Voltage Level Old OSHA MAD Voltage Level New OSHA MAD

345 kV 7.0 ft 345 kV 11.2 ft (+4.2 ft)

500 kV 11.0 ft 500 kV 16.6 ft (+5.6 ft)

765 kV 15.0 ft 765 kV 22.6 ft (+7.6 ft)

OSHA Default Maximum Transient Overvoltage for Calculation of Minimum Approach Distances

Example of OSHA Default T-values Impact on Minimum Approach Distances for Common Voltage Levels

11© 2015 Electric Power Research Institute, Inc. All rights reserved.

Technical Basis for Categorizing Line T-Values for

Determining Minimum Approach Distances

3002004445. 2014 (PDF of Final Results)

Application Guide for Determining Line T-Values

Minimum Approach Distances 3002006873. 2015

Technical Basis for Categorizing Line T-Values for

Determining Minimum Approach Distances

3002004444. 2015 (Technical Report)

Specification Guide for Determining Line T-Values for

Minimum Approach Distances 3002007708. 2016

EPRI Response to New OSHA Rules: Technical Guidance for

System Studies related to Line TOV Values

12© 2015 Electric Power Research Institute, Inc. All rights reserved.

Minimum Approach Distance Testing Project– Provide Minimum Approach Distances values for live work based on scientific research and

actual test data

– Results may allow live work in cases where it was previously not permissible or practical

based on standardized “default’ overvoltage values

Application of Line Arresters for Worksite

Protection– Improved worker safety during energized work by providing ‘tighter’ control of transient

overvoltage levels at the worksite than other devices in use.

– Minimizes the hazards associated with step and touch potential and arc flash at the

worksite should the protective arrester need to operate while live working is in progress.

MAD Training Video– Production of high quality training material related to live and de-energized work for

practicing workers, stakeholders and the Industry at large

EPRI’s Response to New OSHA Rules: Testing, Improve Worksite Protection and Training

Resources

Line Surge Arrester

13© 2015 Electric Power Research Institute, Inc. All rights reserved.

PP

AG

On Red Phase

345kV

Portable Protective Arrester vs. Portable Protective Airgap

2 kV Ground

potential rise

25 W tower footing

resistance

Red phase SOV

limited to 1.66 pu

Breaker

Operation Outage

35 kV Ground

potential rise

25 W tower footing

resistance

Red phase SOV

limited to 1.52 pu

No Outage

Arr

es

ter

On Red Phase

345kV

14© 2015 Electric Power Research Institute, Inc. All rights reserved.

Portable Protective Arrester Project Tasks

Arrester Selection

Application

Installation

Integrity

1. MCOV

2. Energy Rating

3. Protective Level

4. Lead Rating

Electric Field Distribution

1. Bucket

2. Telescopic Boom

3. Line Pulley

4. From Structure

1. Prior to Installation 2. While Installed

15© 2015 Electric Power Research Institute, Inc. All rights reserved.

Integrity Assessment

DC TestPortable DC Supply [Resistive Current]

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

A1 A24 A25 A2 A20 A21 A22 A23

DC

Cu

rre

nt

at P

eak

MC

OV

Arrester ID

Room 35C (95F)

Warm 27C (81F)

0

100

200

300

400

500

600

700

800

900

1000

A1 A24 A25 A2 A20 A21 A22 A23

Re

sid

ual

Cu

rre

nt

F3 1

80

-Hz

Co

mp

on

en

t

Arrester ID

Room 27C (81F)

Warm 35C (95F)

Online Monitor (Stinger)

3rd harmonic of the extracted

residual current

Before Installation While Energized

16© 2015 Electric Power Research Institute, Inc. All rights reserved.

17© 2015 Electric Power Research Institute, Inc. All rights reserved.

Questions?