Development OPGW NSW_2013
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Transcript of Development OPGW NSW_2013
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Introduction to NSW
4-Nov-13 / 1
Optical Ground Wires
(OPGW) Presented by NSW (Norddeutsche Seekabelwerke GmbH)
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Introduction to NSW
4-Nov-13 / 2
NSW The Company
Plant Overview
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Introduction to NSW
4-Nov-13 / 3
NSW Ground Wire History
Ground Wire Cables
production since 1960s
Fiber Optic Ground Wire
cable production since 1980s
More than 100 years experience in cable armoring
Our Experience
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Introduction to NSW
4-Nov-13 / 4
NSW Ground Wire History
The History
NSW Ground Wire History and
Design Development
over more than 50 years
Copper Ground Wire Cables
Hybrid Electro / Optical Ground Wire Cable
OPGW with Stranded Steel Tube
FO - Central Plastic Tube
Central Aluminum Buffer Tube Design
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Introduction to NSW
4-Nov-13 / 5
NSW Ground Wire History
Copper Ground Wire Cables
Start of production early 60`s
Stranded copper star quads
(four wires)
Armoring wires (one and two layers)
PE-HD Jacket
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Introduction to NSW
4-Nov-13 / 6
NSW Ground Wire History
OPGW with Stranded Steel Tube
Armoring wires (one and two layers)
Stranded FO single tubes (steel)
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Introduction to NSW
4-Nov-13 / 7
NSW Ground Wire History
FO - Central Plastic Tube
FO - central Plastic tube
Armoring wires (one and two layers)
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Introduction to NSW
4-Nov-13 / 8
NSW Designs
high fiber counts
small outer diameter
high fiber excess length
protective tube only
low crush resistance additional weight careful installation
Fibers are placed in a stainless steel tube
tube in the center of the cable, protected by
one or more layers of armoring wires.
Central Buffer Tube Made of Stainless Steel
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Introduction to NSW
4-Nov-13 / 9
NSW Standard OPGW Design
Central Aluminum Buffer Tube
high protection against
mechanical and
electrical loads
high fiber counts
small outer diameter
higher fiber excess length
good thermal performance
Limited outer diameter with
single layer design
Fibers are placed in a aluminum tube in the
center of the cable, protected by one or more
layers of armoring wires.
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Introduction to NSW
4-Nov-13 / 10
NSW New Single Layer OPGW Design
Big Central Aluminum Buffer Tube with enhanced Wall Thickness
highest protection against
mechanical and
electrical loads
highest fiber counts
small outer diameter
higher fiber excess length
Very good thermal advantage
Limited outer diameter with
single layer design
Fibers are placed in a aluminum tube in the
center of the cable, protected by one layer of
armoring wires (mostly ACS).
X
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Introduction to NSW
4-Nov-13 / 11
OPGW Design Criteria
Main reasons for NSW to investigate and develop
the aluminum central buffer tube design
1. Conductivity
2. Corrosion
3. Fiber excess length
4. Various diameters with single layer design reduce weight
5. Capability to use thicker ACS-Wires for better lightning
protection
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Introduction to NSW
4-Nov-13 / 12
Conductivity
Sample: AA/ACS 41/41 with St-Tube
0 5 10 15 20 25 30 0
50
100
150
200
250
Time / s
Te
mp
era
ture
Ch
an
ge
/K
286
T lt i T tr i
T BA i
T F i
t i
Steel tube
AA - wire
ACS - wire
Fiber
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Introduction to NSW
4-Nov-13 / 13
Sample: AA/ACS 41/41 with Al-Tube
0 5 10 15 20 25 30
50
100
150
180
0
Te
mp
era
ture
Ch
an
ge
/K
T lt i T tr i
T BA i
T F i
Time / s
t i
Aluminum tube
AA - wire
ACS - wire
Fiber
Conductivity
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Introduction to NSW
4-Nov-13 / 14
Comparison Al-St-Tube
AA/ACS 41/41 High Current Test I2t = 64 kA
2s
0
50
100
150
200
250
300
350
AA Wires ACS Wires Tube Fiber
Ma
x. Te
mp
era
ture
/ K
Al-Tube
St-Tube
Conductivity
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Introduction to NSW
4-Nov-13 / 15
Fiber Excess Length
Elongation
Contraction
Conventional Design:
Att
enuation c
hange
0
Tension
Cable
Fiber
Conventional design
CBT
Elo
ngation
Fiber Excess Length Design:
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Introduction to NSW
4-Nov-13 / 16
-0,2
0,0
0,2
0,4
0,6
0,8
1,0
0 0,2 0,4 0,6 0,8 1
-0,2
0,0
0,2
0,4
0,6
0,8
1,0
Fiber strain / %
Attenuation / dB
Cable strain / %
Fib
er
str
ain
/ %
Att
enuation c
hange
(1550 n
m)
/ dB
No stretching of fibers
if cable is elongated
Enough safety
Included in the design
NSW Design Philosophy
Fiber Excess Length
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Introduction to NSW
4-Nov-13 / 17
Central Buffer Tube Design
Highest protection of fibers
Low weight of cables means less additional loads on towers
Central buffer tube allows a wide range of fiber count within the same cable type
Long experience in manufacturing armored cables, including extended
knowledge in preforming of armoring wires
Extensive type testing demonstrates high performance safety
Minimized corrosion problems with compatible structure
Capability for better lightning protection in single layer designs
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Introduction to NSW
4-Nov-13 / 18
Single layer design
- low cost producer depending on volume
- use of aluminum clad steel wires or a mixture
of aluminum alloy wires and aluminum clad
steel wires
Multi layer design
- low torsion due to pre-forming of wires
- load bearing elements (inner layer) are well
protected against lightning
- thermal advantages
- use aluminum wires, aluminum alloy wires and
aluminum clad steel wires
Central Buffer Tube Design
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Introduction to NSW
4-Nov-13 / 19
NSW Famous Crossings
Special Engineering Difficulties
Installation
in China
Bosphorus
Crossing
Suez Channel
Crossing
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Introduction to NSW
4-Nov-13 / 20
NSW Famous Crossings
Special Engineering Difficulties
Customer: EEA, Cairo / Egypt
Purpose of the Link:
Connection of the 500 kV network of Egypt with
Sinai Peninsula and interconnection to Jordan
Contractor: Siemens AG Erlangen / STFA Ankara
Time Schedule
Contract Award: March 1996
Energizing: June 1998
Egypt
500 kV Suez Canal Crossing
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Introduction to NSW
4-Nov-13 / 21
NSW Famous Crossings
Special Engineering Difficulties
Ratings
Max. Voltage: 525 kV
Max. Power (AC, therm., DIN): 2800 MVA/cct.
Towers: 220 m high Crossing Suspension Towers
equipped with elevator and aircraft warning lights
Number of Circuits: 2
Conductors per Phase: 3
Size of Conductor: AACSR/AW 290/64 mm
Shield-wire: 2 OPGW AA/ACS 136/134
Insulators: Cap and Pin Type, Porcelain
Fittings: Double Suspension and Triple Tension String
Pile foundation: with 77 piles 0.75 m diameter
500 kV Suez Canal Crossing
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Introduction to NSW
4-Nov-13 / 22
NSW Famous Crossings
Special Engineering Difficulties
TYPE :
ASLH-DABBB1x24E9/125(AA/ACS 136/134)
Cable Design : Central element :buffer tube, filled 3.80 mm 1st layer : 7 Al-clad steel wires (AW) 2.80 mm 2nd layer : 12 Al-clad steel wires (AW) 3.10 mm 3rd layer : 18 Al-Alloy wires (AY) 3.10 mm Mechanical data, measurements and weight : Diameter (approx.) : 21.8 mm
Weight of Cable (approx.) : 1305 kg / km
Rated Tensile Strength : 201 kN
Modulus of elasticity : 109 kN/mm2
Cross-section AW : 133.7 mm2
Cross-section AY : 135.9 mm2
Cross-section ratio : 1.0
Load-bearing cross-section : 269.5 mm2
Everyday stress (20 % RTS) : 149 N/mm2
Nominal transient current (TINITIAL = 20oC) : 15.4 kA (1s)
DC resistance (T=20oC) : 0.18 / km
Coefficient of linear expansion : (10-6) 15.3 1/K
Deflecting radius / Bending radius (min.) : 440 / 330 mm
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Introduction to NSW
4-Nov-13 / 23
NSW Famous Crossings
Special Engineering Difficulties
OPGW Project Suez Crossing
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Introduction to NSW
4-Nov-13 / 24
NSW Famous Crossings
Special Engineering Difficulties
Turkey
Customer: TEAS / Turkey
Purpose of the Link:
Interconnection of European and Asian Grid
with third Bosphorus Crossing using four
420 kV Circuits in first stage
Contractor: Siemens AG Erlangen / STFA Ankara
Contract Value:
27 Mio. US$
Time Schedule
Contract Award: Dec. 1997
Energizing: Dec. 1998
380/735 kV Bosphorus Crossing
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Introduction to NSW
4-Nov-13 / 25
NSW Famous Crossings
Special Engineering Difficulties
Number of Circuits: 4
Conductors per Phase: 1
Size of Conductor : AACSR/AW 1802/226 mm
Shield-wire: 2 OPGW AW330 mm
Insulators: Cap and Pin Type, Glass
Fittings: 4 x 20 psc. (Double V-Suspension String)
2 x 22 psc. (Double Suspension String)
2 x 20 psc. (Double Tension String)
Ratings
Max. Voltage:420 kV (upgradable to 800 kV)
Max. Power (AC, therm., DIN): 1600 MVA/cct
Distance: 3.1 km (Crossing Section)
380/735 kV Bosphorus Crossing
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Introduction to NSW
4-Nov-13 / 26
NSW Famous Crossings
Special Engineering Difficulties
Cable Design :
Central element : buffer tube, filled 6.00 mm
1st layer : 9 Al-clad steel wires (AW) 3.00 mm
2nd layer : 15 Al-clad steel wires (AW) 3.00 mm
3rd layer : 20 Al-clad steel wires (AW) 3.20 mm
Mechanical data, measurements and weight :
Diameter (approx.) : 24.4 mm
Weight of Cable (approx.) : 2350 kg / km
Rated Tensile Strength : 407 kN
Modulus of elasticity : 162 kN/mm2
Cross-section AW : 330.5 mm2
Load-bearing cross-section : 330.5 mm2
Everyday stress (20 % RTS) : 246 N/mm2
Nominal transient current (TINITIAL = 40oC) : 18.0 kA (0,5 s)
DC resistance (T=20oC) : 0.26 / km
Coefficient of linear expansion (10-6) : 12.6 1/K
Deflecting radius / Bending radius (min.) : 490/370 mm
TYPE :
ASLH-DABBB1x22E9/125(ACS 300)
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Introduction to NSW
4-Nov-13 / 27
NSW Famous Crossings
Special Engineering Difficulties
1884m 502m 728m
73m 70m 127m 88m
158m 153m
161m 64m 161m
64m
Europe Asia
Bosphorus
380/735 kV Bosphorus Crossing
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Introduction to NSW
4-Nov-13 / 28
Thank you
for Your Attention!