transmission & substations area research priorities · pdf filep162 hvdc • new...
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© 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
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HVDC
Intersection between T&S & GOP
Protection & Control
Asset Management Analytics
Ratings
TOV - MAD
Advanced Sensors
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Geomagnetically Induced Current (GIC)
Traditional Sensing Location
GIC Currents
Energized RF Sensor Location
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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
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38 Active EPRI Member RF Sensor Demonstration Sites
+ 2 GIC Planning
9
GIC
GIC
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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?