Session 2: Our Future - Paper 5
Comparison of Subsea Power
Cable Tracking Systems and
accuracy investigation of the
Teledyne TSS 350
Master of Science Thesis
Oliver Kümpel
Principal Advisor:
Prof. Dr.-Ing. Delf Egge
(HafenCity Universität Hamburg)
Second Advisor:
Dipl.-Geophysiker Manfred Stender
(Fugro OSAE GmbH, Bremen)
28.10.2014
Contents
01
02
03
Introduction of submarine power cable operations
•
•
•
Governmental Regulations in the German Bight
2-kelvin criterion
HVAC / HVDC
Physical background of cable tracking
•
•
Active vs. Passive Systems
Comparison Matrix
Accuracy investigation of the Teledyne TSS 350
•
•
Company promised results
Own field test
04
Result analysis of the test
05
Conclusion
•
Adjustment
2
1.
Introduction of submarine power cable operations
Governmental Regulations in the German Bight
2-kelvin criterion
HVAC / HVDC
• Power grid links between countries
• Links between oil/gas platforms and
ocean science observatories
• Transfer of power from offshore
renewable energy schemes to shore
3
1.
Introduction of submarine power cable operations
Governmental Regulations in the German Bight
2-kelvin criterion
HVAC / HVDC
4
1.
Introduction of submarine power cable operations
Governmental Regulations in the German Bight
2-kelvin criterion
HVAC / HVDC
5
1.
Introduction of submarine power cable operations
Governmental Regulations in the German Bight
2-kelvin criterion
HVAC / HVDC
German Offshore Network plan
requests:
1.5m DOB everywhere in the German EEZ
excluding
3.0m DOB in the Traffic Separation
Schemes.
6
1.
Introduction of submarine power cable operations
Governmental Regulations in the German Bight
2-kelvin criterion
HVAC / HVDC
2-K criterion:
The heating of the seabed
should:
not exceed two Kelvin (2-K)
in a depth of
20cm (EEZ) or
30cm (Wadden Sea)
Result:
Burial depth of 1.5m is
sufficient
7
1.
Introduction of submarine power cable operations
Governmental Regulations in the German Bight
2-kelvin criterion
HVAC / HVDC
HVAC
HVDC
[new.abb.com/systems]
8
1.
Introduction of submarine power cable operations
Governmental Regulations in the German Bight
2-kelvin criterion
HVAC / HVDC
HVAC
HVDC
9
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Cable survey purposes:
• inspect cables after lay to ensure the laying (and
burial) specification has been met
• necessary to routinely inspect the cable in order
to certify its suitability for continued service
• positively locate existing cables prior carrying out
works
10
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Active
Passive
Pulse induction
trackers
Magnetic trackers or
Gradiometers
Acoustic trackers
Motion induction
trackers
11
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Active
Passive
Pulse induction
trackers
Magnetic trackers or
Gradiometers
Acoustic trackers
Motion induction
trackers
12
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Active:
Pulse induction tracker
• Transmits an intense
burst of
electromagnetic
energy, which then
excites local electrical
currents to flow
• When transmit pulse
ends the collapse of
the field cause a
secondary pulse
13
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Active:
Pulse induction tracker
• Transmits an intense
burst of
electromagnetic
energy, which then
excites local electrical
currents to flow
• When transmit pulse
ends the collapse of
the field cause a
secondary pulse
Teledyne TSS 440
14
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Active
Passive
Pulse induction
trackers
Magnetic trackers or
Gradiometers
Acoustic trackers
Motion induction
trackers
15
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Active:
Acoustic trackers
• Powerful Sub-Bottom
like point cloud
• Intense use of filter
techniques
16
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Active:
Acoustic trackers
• Powerful Sub-Bottom
like point cloud
• Intense use of filter
techniques
PanGeo Sub-Bottom Imager
17
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Active
Passive
Pulse induction
trackers
Magnetic trackers
or Gradiometers
Acoustic trackers
Motion induction
trackers
18
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Passive:
• Measure disturbances
in earth’s magnetic
field
Magnetic trackers or
Gradiometers
• Weak field of the cable
• Specially magnetized
cable armor prior to
cable lay
19
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Passive:
• Measure disturbances
in earth’s magnetic
field
Magnetic trackers or
Gradiometers
• Weak field of the cable
• Specially magnetized
cable armor prior to
cable lay
Innovatum Smartrak 9
20
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
Active
Passive
Pulse induction
trackers
Magnetic trackers or
Gradiometers
Acoustic trackers
Motion induction
trackers
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
• Induction by moving
coils in electromagnetic
field
Passive:
Motion induction
trackers
22
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
• Induction by moving
coils in electromagnetic
field
Passive:
Motion induction
trackers
23
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
• Induction by moving
coils in electromagnetic
field
Teledyne TSS 350
Passive:
Motion induction
trackers
24
2.
Physical background of cable tracking
Active vs. Passive Systems
Comparison Matrix
25
3.
Field test of the Teledyne TSS 350
Company promised results
Own field test
26
3.
Field test of the Teledyne TSS 350
Company promised results
Own field test
27
4.
Result analysis of the field test
Adjustment
0,1,2,3m LAT
28
4.
Result analysis of the field test
Adjustment
29
4.
Result analysis of the field test
Adjustment
30
5.
Conclusion
Cable
specs
Tool
Selection
Methods
and their
limitations
As-laid vs.
Post laid
survey
Know
your
system
Data
processing
and
review
Presentation
of results
Report
Charts
31
5.
Conclusion
Thank you for
your attention.
Questions?
32