Post on 04-Apr-2018
1
2012 Transmission Planning and
Development Conference Advances in Technology
and Construction of Extra
High-Voltage Underground
Transmission Lines
NEAL PARECE
Vice President Power Delivery
KIEWIT POWER GROUP INC
9401 Renner Blvd Lenexa KS 66219
(913) 928-7000 Ext 7320
nealparecekiewitcom
ROGER ROSENQVIST
Vice President Business Development
ABB POWER SYSTEMS DIVISION NORTH AMERICA
GRID SYSTEMS
940 Main Campus Drive Suite 300 Raleigh North Carolina 27606
(919) 856-2394
rogernrosenqvistusabbcom
2
Background
New electric transmission
capacity is needed to support
policies to retire older fossil
fuel based power plants
expand access to renewable
generation resources and
maintain reliability
Significant public opposition
to overhead transmission
line construction has raised
legal and permitting barriers
that can severely delay
new projects
Factors commonly cited
against construction of new
overhead transmission lines
Aesthetics
Land use constraints
EMF
3
History of Polymer Insulated Cable Systems
for Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
4
CONDUCTOR Copperround segmented
CONDUCTOR SHIELD Conductive PE
INSULATION
- Type Triple extruded dry cured
- Material XLPE
INSULATION SHIELD Conductive PE
LONGITUDINAL WATER SEALING Swell able tape
METALLIC SCREEN Copper wire
TEMPERATURE MONITORING FIMT in metallic screen
RADIAL WATER SEALING Laminate (Al or Cu) and PE
OUTER JACKET Polyethylene
Typical EHV AC Cable Design (Laminate Sheath)
5
Project was energized in Dec 2008
History of Polymer Insulated Cable Systems
for Transmission
MiddletonNorwalk
Project
bull Length 69 miles of new
345-kilovolt (kV) line
bull 45 miles of overhead
bull 24 miles of underground
6
Polymer Insulated Cable Systems for HV and
EHV Transmission
Charging current in AC cables increases cumulatively with distance (For example 25 miles of 345 kV XLPE cable requires approximately 600 A charging current)
Capacity to transmit real power diminishes with distance limiting the practical length of AC underground and submarine cable transmission circuits
HVDC cables carry charging current only during energization
7
History of Polymer Insulated Cable Systems for
Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
1999 The worldrsquos first polymer insulated cable system for direct current transmission
8
Application
Connect a new onshore wind power
facility on the southern part of the island
to Gotlandrsquos main load centre
Fast reactive power regulation to
support integration of wind power
facility to the islandrsquos grid
Solution
43 miles long 160 kV (plusmn80 kV) 50 MW
HVDC underground cable circuit (HVDC
underground cables made it much easier
to obtain permits for the new line)
Compact HVDC voltage source
converters that provide dynamic voltage
support to the islandrsquos AC grid
In-Service Year ndash 1999
Gotland HVDC Underground Cable Project
9
+ UDC
- UDC
Electrode
UDC
UDC
Pole conductor
Pole conductor
Metallic return conductor
HVDC Bipole (Traditional Layout for DC OH-Lines)
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
2
Background
New electric transmission
capacity is needed to support
policies to retire older fossil
fuel based power plants
expand access to renewable
generation resources and
maintain reliability
Significant public opposition
to overhead transmission
line construction has raised
legal and permitting barriers
that can severely delay
new projects
Factors commonly cited
against construction of new
overhead transmission lines
Aesthetics
Land use constraints
EMF
3
History of Polymer Insulated Cable Systems
for Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
4
CONDUCTOR Copperround segmented
CONDUCTOR SHIELD Conductive PE
INSULATION
- Type Triple extruded dry cured
- Material XLPE
INSULATION SHIELD Conductive PE
LONGITUDINAL WATER SEALING Swell able tape
METALLIC SCREEN Copper wire
TEMPERATURE MONITORING FIMT in metallic screen
RADIAL WATER SEALING Laminate (Al or Cu) and PE
OUTER JACKET Polyethylene
Typical EHV AC Cable Design (Laminate Sheath)
5
Project was energized in Dec 2008
History of Polymer Insulated Cable Systems
for Transmission
MiddletonNorwalk
Project
bull Length 69 miles of new
345-kilovolt (kV) line
bull 45 miles of overhead
bull 24 miles of underground
6
Polymer Insulated Cable Systems for HV and
EHV Transmission
Charging current in AC cables increases cumulatively with distance (For example 25 miles of 345 kV XLPE cable requires approximately 600 A charging current)
Capacity to transmit real power diminishes with distance limiting the practical length of AC underground and submarine cable transmission circuits
HVDC cables carry charging current only during energization
7
History of Polymer Insulated Cable Systems for
Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
1999 The worldrsquos first polymer insulated cable system for direct current transmission
8
Application
Connect a new onshore wind power
facility on the southern part of the island
to Gotlandrsquos main load centre
Fast reactive power regulation to
support integration of wind power
facility to the islandrsquos grid
Solution
43 miles long 160 kV (plusmn80 kV) 50 MW
HVDC underground cable circuit (HVDC
underground cables made it much easier
to obtain permits for the new line)
Compact HVDC voltage source
converters that provide dynamic voltage
support to the islandrsquos AC grid
In-Service Year ndash 1999
Gotland HVDC Underground Cable Project
9
+ UDC
- UDC
Electrode
UDC
UDC
Pole conductor
Pole conductor
Metallic return conductor
HVDC Bipole (Traditional Layout for DC OH-Lines)
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
3
History of Polymer Insulated Cable Systems
for Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
4
CONDUCTOR Copperround segmented
CONDUCTOR SHIELD Conductive PE
INSULATION
- Type Triple extruded dry cured
- Material XLPE
INSULATION SHIELD Conductive PE
LONGITUDINAL WATER SEALING Swell able tape
METALLIC SCREEN Copper wire
TEMPERATURE MONITORING FIMT in metallic screen
RADIAL WATER SEALING Laminate (Al or Cu) and PE
OUTER JACKET Polyethylene
Typical EHV AC Cable Design (Laminate Sheath)
5
Project was energized in Dec 2008
History of Polymer Insulated Cable Systems
for Transmission
MiddletonNorwalk
Project
bull Length 69 miles of new
345-kilovolt (kV) line
bull 45 miles of overhead
bull 24 miles of underground
6
Polymer Insulated Cable Systems for HV and
EHV Transmission
Charging current in AC cables increases cumulatively with distance (For example 25 miles of 345 kV XLPE cable requires approximately 600 A charging current)
Capacity to transmit real power diminishes with distance limiting the practical length of AC underground and submarine cable transmission circuits
HVDC cables carry charging current only during energization
7
History of Polymer Insulated Cable Systems for
Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
1999 The worldrsquos first polymer insulated cable system for direct current transmission
8
Application
Connect a new onshore wind power
facility on the southern part of the island
to Gotlandrsquos main load centre
Fast reactive power regulation to
support integration of wind power
facility to the islandrsquos grid
Solution
43 miles long 160 kV (plusmn80 kV) 50 MW
HVDC underground cable circuit (HVDC
underground cables made it much easier
to obtain permits for the new line)
Compact HVDC voltage source
converters that provide dynamic voltage
support to the islandrsquos AC grid
In-Service Year ndash 1999
Gotland HVDC Underground Cable Project
9
+ UDC
- UDC
Electrode
UDC
UDC
Pole conductor
Pole conductor
Metallic return conductor
HVDC Bipole (Traditional Layout for DC OH-Lines)
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
4
CONDUCTOR Copperround segmented
CONDUCTOR SHIELD Conductive PE
INSULATION
- Type Triple extruded dry cured
- Material XLPE
INSULATION SHIELD Conductive PE
LONGITUDINAL WATER SEALING Swell able tape
METALLIC SCREEN Copper wire
TEMPERATURE MONITORING FIMT in metallic screen
RADIAL WATER SEALING Laminate (Al or Cu) and PE
OUTER JACKET Polyethylene
Typical EHV AC Cable Design (Laminate Sheath)
5
Project was energized in Dec 2008
History of Polymer Insulated Cable Systems
for Transmission
MiddletonNorwalk
Project
bull Length 69 miles of new
345-kilovolt (kV) line
bull 45 miles of overhead
bull 24 miles of underground
6
Polymer Insulated Cable Systems for HV and
EHV Transmission
Charging current in AC cables increases cumulatively with distance (For example 25 miles of 345 kV XLPE cable requires approximately 600 A charging current)
Capacity to transmit real power diminishes with distance limiting the practical length of AC underground and submarine cable transmission circuits
HVDC cables carry charging current only during energization
7
History of Polymer Insulated Cable Systems for
Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
1999 The worldrsquos first polymer insulated cable system for direct current transmission
8
Application
Connect a new onshore wind power
facility on the southern part of the island
to Gotlandrsquos main load centre
Fast reactive power regulation to
support integration of wind power
facility to the islandrsquos grid
Solution
43 miles long 160 kV (plusmn80 kV) 50 MW
HVDC underground cable circuit (HVDC
underground cables made it much easier
to obtain permits for the new line)
Compact HVDC voltage source
converters that provide dynamic voltage
support to the islandrsquos AC grid
In-Service Year ndash 1999
Gotland HVDC Underground Cable Project
9
+ UDC
- UDC
Electrode
UDC
UDC
Pole conductor
Pole conductor
Metallic return conductor
HVDC Bipole (Traditional Layout for DC OH-Lines)
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
5
Project was energized in Dec 2008
History of Polymer Insulated Cable Systems
for Transmission
MiddletonNorwalk
Project
bull Length 69 miles of new
345-kilovolt (kV) line
bull 45 miles of overhead
bull 24 miles of underground
6
Polymer Insulated Cable Systems for HV and
EHV Transmission
Charging current in AC cables increases cumulatively with distance (For example 25 miles of 345 kV XLPE cable requires approximately 600 A charging current)
Capacity to transmit real power diminishes with distance limiting the practical length of AC underground and submarine cable transmission circuits
HVDC cables carry charging current only during energization
7
History of Polymer Insulated Cable Systems for
Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
1999 The worldrsquos first polymer insulated cable system for direct current transmission
8
Application
Connect a new onshore wind power
facility on the southern part of the island
to Gotlandrsquos main load centre
Fast reactive power regulation to
support integration of wind power
facility to the islandrsquos grid
Solution
43 miles long 160 kV (plusmn80 kV) 50 MW
HVDC underground cable circuit (HVDC
underground cables made it much easier
to obtain permits for the new line)
Compact HVDC voltage source
converters that provide dynamic voltage
support to the islandrsquos AC grid
In-Service Year ndash 1999
Gotland HVDC Underground Cable Project
9
+ UDC
- UDC
Electrode
UDC
UDC
Pole conductor
Pole conductor
Metallic return conductor
HVDC Bipole (Traditional Layout for DC OH-Lines)
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
6
Polymer Insulated Cable Systems for HV and
EHV Transmission
Charging current in AC cables increases cumulatively with distance (For example 25 miles of 345 kV XLPE cable requires approximately 600 A charging current)
Capacity to transmit real power diminishes with distance limiting the practical length of AC underground and submarine cable transmission circuits
HVDC cables carry charging current only during energization
7
History of Polymer Insulated Cable Systems for
Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
1999 The worldrsquos first polymer insulated cable system for direct current transmission
8
Application
Connect a new onshore wind power
facility on the southern part of the island
to Gotlandrsquos main load centre
Fast reactive power regulation to
support integration of wind power
facility to the islandrsquos grid
Solution
43 miles long 160 kV (plusmn80 kV) 50 MW
HVDC underground cable circuit (HVDC
underground cables made it much easier
to obtain permits for the new line)
Compact HVDC voltage source
converters that provide dynamic voltage
support to the islandrsquos AC grid
In-Service Year ndash 1999
Gotland HVDC Underground Cable Project
9
+ UDC
- UDC
Electrode
UDC
UDC
Pole conductor
Pole conductor
Metallic return conductor
HVDC Bipole (Traditional Layout for DC OH-Lines)
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
7
History of Polymer Insulated Cable Systems for
Transmission
1970s Deliveries of polymer insulated (ldquoXLPErdquo) cable systems for voltage ratings up to 145 kV
1980s XLPE transmission cable systems rated 230 kV
1990s XLPE transmission cable systems rated 345 kV 420 kV and 500 kV
1999 The worldrsquos first polymer insulated cable system for direct current transmission
8
Application
Connect a new onshore wind power
facility on the southern part of the island
to Gotlandrsquos main load centre
Fast reactive power regulation to
support integration of wind power
facility to the islandrsquos grid
Solution
43 miles long 160 kV (plusmn80 kV) 50 MW
HVDC underground cable circuit (HVDC
underground cables made it much easier
to obtain permits for the new line)
Compact HVDC voltage source
converters that provide dynamic voltage
support to the islandrsquos AC grid
In-Service Year ndash 1999
Gotland HVDC Underground Cable Project
9
+ UDC
- UDC
Electrode
UDC
UDC
Pole conductor
Pole conductor
Metallic return conductor
HVDC Bipole (Traditional Layout for DC OH-Lines)
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
8
Application
Connect a new onshore wind power
facility on the southern part of the island
to Gotlandrsquos main load centre
Fast reactive power regulation to
support integration of wind power
facility to the islandrsquos grid
Solution
43 miles long 160 kV (plusmn80 kV) 50 MW
HVDC underground cable circuit (HVDC
underground cables made it much easier
to obtain permits for the new line)
Compact HVDC voltage source
converters that provide dynamic voltage
support to the islandrsquos AC grid
In-Service Year ndash 1999
Gotland HVDC Underground Cable Project
9
+ UDC
- UDC
Electrode
UDC
UDC
Pole conductor
Pole conductor
Metallic return conductor
HVDC Bipole (Traditional Layout for DC OH-Lines)
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
9
+ UDC
- UDC
Electrode
UDC
UDC
Pole conductor
Pole conductor
Metallic return conductor
HVDC Bipole (Traditional Layout for DC OH-Lines)
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
10
+ UDC
- UDC
2timesUDC (Circuit Voltage)
Pole conductor
Pole conductor
Symmetric Monopole (Typical Layout for DC Cables)
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
11
Conductor material Copper or Aluminum
Conductor screen material Conductive PE
Insulation typematerial Dry cured HVDC polymer (XLPE)
Insulation screen Conductive PE
Bedding Conductive swelling tapes
Metallic screen Copper wires
Bedding Conductive swelling tapes
Radial moisture barrier Aluminum-PE laminate
Outer jacket Polyethylene
Typical Solid Dielectric DC Cable Design
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
12
1999
Gotland
160 kV (plusmn80 kV)
50 MW
43 miles
2000
Direct Link
160 kV (plusmn80 kV)
3times60 MW
3times40 miles
2002
Murray Link
300 kV (plusmn150 kV) 220 MW
112 miles
2006
EstLink
300 kV (plusmn150 kV) 350 MW
20 miles (+46 miles subsea)
2009
BorWin 1
300 kV (plusmn150 kV) 400 MW
47 miles (+80 miles subsea)
2012
EWIP
400 kV (plusmn200 kV) 500 MW
46 miles (+116 miles subsea)
2007-2009
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
640 kV (plusmn320 kV) up to 1100 MW
2013
DolWin1
640 kV (plusmn320 kV) 800 MW
60 miles (+47 miles subsea)
2015
NordBalt
600 kV (plusmn300 kV) 700 MW
31 miles (+248 miles subsea)
2015
DolWin 2
640 kV (plusmn320 kV) 900 MW
56 miles (+28 miles subsea)
In the Future
Type and PQ tests
2500 mm2 (asymp5000 kcmil) Cu or Al
1000 kV (plusmn500 kV) up to 1700 MW
Solid Dielectric Cables for HVDC Transmission
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
13
Less than
five acres
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
14
HVDC VSC 640 kV (plusmn320 kV) 350 ndash 1100 MW
bull Two-level converter
bull Cascade connection
+ Ud
- Ud
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
15
Date is when the project
entered into service or
is scheduled to enter
into service
Murraylink
2002 220 MW
Directlink
2000 3X60 MW
Gotland
1999 50 MW
Tjaumlreborg
2000 7 MW
Haumlllsjoumln
1997 3 MW
Estlink
2006 350 MW
Eagle Pass
2000 36MW
Cross Sound
2003 330 MW
EWIP
2012 550 MW
Caprivi link
2010 300 MW
BorWin 1
2010 400 MW
Valhall
2010 78 MW Troll
2004 2X40 MW
DolWin 1
2013 800 MW
DolWin 2
2015 900 MW
NordBalt
2015 700 MW
HVDC Lightreg projects
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
16
Reactive Power (pu)
Ac
tive
Po
we
r (p
u)
Operating Area
P-Q Diagram
HVDC VSC Operating Range
HVDC VSC 640 kV (plusmn320 kV) 350-1100 MW
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
17
Rapid Cable Installation Method
bull Innovative method to install HVDC cable designed to
minimize cost while maximizing production and schedule
bull Train of equipment to trench install cable and backfill
bull Uses existing corridor
ndash Known geotechnical information from previous utility work
ndash Minimize clearing additional access permits ROW issues
environmental impact
bull Safety
ndash No open trench ndash less risk to people and wildlife
ndash Minimal crew size
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
18
Rapid Cable Installation Method (cont)
bull Quality
ndash Consistent trench depth
bull Depth gauge on trencher
bull Depth mark on box plow
ndash Even cable separation
ndash Uniform thermally
acceptable backfill ndash
custom designed plow box
with vibrators to ensure
proper bedding cover and
compaction
bull Minimal weather
susceptibility
ndash Decrease potential cable
damage due to exposure
since we backfill
immediately behind cable
laying
ndash Short lag between
operations so minimal
exposure if cable
operation has to stop for
any reason
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
19
Assumptions and Things to Consider
bull Assumptions
ndash Reasonably flat terrain with suitable soil for rapid trenching
ndash Thermally acceptable backfill ndash 28rdquo x 1 ft
ndash Occasional rock can be trenched through
ndash 35 ft min corridor needed
ndash 2000 ft avg reel size
bull Things to consider
ndash Obstructions
ndash Congestion of existing utilities
ndash Corridor widths
ndash Existing foundations in the right-of-way corridor
ndash Access points for cable delivery
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
20
Typical Overhead Right of Way
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
21
Execution Plan
bull Goal install 8000 ft of cable per day
(four reels at 2000 ft per reel) in optimum conditions
bull Four simultaneous operations
ndash Trenchingcable layingStokbord
ndash Backfilling remaining trench
ndash Procuring thermal fill material
ndash Cable handling
bull Subsequent operations
ndash Splice pit excavation and set splicing box
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
22
TrenchingCable LayingCable Protection
bull Use a large trencher with a specially designed plow box
ndash Cut 28 in wide x 45 ft deep trench
ndash Place 35 in thermally acceptable fill
ndash Place two 5 in cables 10 in apart
ndash Place 3 in thermally acceptable cover over cables (12 in total)
ndash Lay cable protection
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
23
TrenchingCable Laying Steps 1-6
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
24
Representative Trencher
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
25
Cable Installation with Plowbox
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
26
Representative Installation Photos
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
27
Install Splice Box ndash Steps 1 and 2
Step 1 Normal Trenching Operation
Step 2 Approaching Splice Pit Location
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
28
Install Splice Box ndash Steps 3 and 4
Step 3 Challenger Pulls Remaining Cable Through Splice Pit
Step 4 New wire is pulled in using puller and soft line
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
29
Cycle Schedule
MORNING AFTERNOON
Crew
Number Operation
53
0 A
M
60
0 A
M
63
0 A
M
70
0 A
M
73
0 A
M
80
0 A
M
83
0 A
M
90
0 A
M
93
0 A
M
10
00
AM
10
30
AM
11
00
AM
11
30
AM
12
00
PM
12
30
PM
10
0 P
M
13
0 P
M
20
0 P
M
23
0 P
M
30
0 P
M
33
0 P
M
40
0 P
M
43
0 P
M
50
0 P
M
1 Transport Cable To ROW 1 1 1 1
1 Travel Back to Yard 1 1 1 1
2 MoveSet Trenching Box 2 2
2 Load Cable on Trencher 2 2
2 Trench 2 2 2 2 2 2 2 2 2 2 2 2 2 2
3 Backfill 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
1 Cable Reel Handling Crew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 Thermal Fill 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
5 Lay Cable Protection 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
1 CABLE HANDLING CREW
2 TRENCHING CREW
3 BACKFILL CREW
4 THERMAL FILL CREW
5 CABLE PROTECTION CREW
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
30
Mobile splicing unit
Installation of Underground Cable Segment
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
31
Installation of Underground Cable Segment
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
32
Crew List
bull Yard crew
bull Trenchingcable
Protection crew
bull Crossing excavation crew
bull Crossing pulling crew
bull Splice pit support crew
bull Splice pit backfill crew
bull Backfill crew
bull Environmental crew
bull Restoration crew
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
33
Application
Increased power transmission
capacity between electricity markets
in New England and Long Island
Solution
25 mile long 300 kV (plusmn150 kV)
330 MW submarine HVDC
cable circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Cross Sound HVDC Cable Project
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
34
Cross Sound HVDC Cable Project
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
35
bull 1000 MW buried
over 333 miles
bull Two cables
approximately
6 inch diameter
bull Connecting clean
hydro and wind
with NYC
bull Significant
environmental
benefits
bull Significant power
price reduction
across the state
Source
wwwchpexpresscom
Champlain Hudson Power Express (CHPE)
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
36
Application
Interconnection of remote parts of
the transmission systems in South
Australia and Victoria
Electricity trading in deregulated
power market
Solution
112 miles long 300 kV (plusmn150 kV)
220MW HVDC underground cable
circuit
Compact HVDC voltage source
converters that provide dynamic
voltage support to the grid
In-Service Year 2002
Murray Link HVDC Cable Project
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
37
Murray Link HVDC Cable Project
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
38
Application
Interconnection of large off-shore
wind generation facility to the German
electric power transmission grid
Solution
127 miles long 300 kV (plusmn150 kV)
400 MW submarine (80 miles)
and underground (47 miles) HVDC
cable circuit
Compact off-shore and on-shore
HVDC voltage source converters
In-Service Year 2009
BorWin 1 HVDC Cable Project
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
39
BorWin Alpha
converter station
Diele
converter
station
BorWin 1 HVDC Cable Project
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
40
Power cables and
fiber optic cable in
common trench
BorWin 1 HVDC Cable System in Germany
41
Questions
41
Questions