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Locating Faults on Energized Airfield Lighting Power Cables

Honkanen, Dennis LU and Anderjon, Simon (2016) In CODEN:LUTEDX/TEIE EIE920 20161
Industrial Electrical Engineering and Automation
Abstract
The purpose of this study is to investigate the feasibility of both online and offline fault location
and state of health technologies for airport series circuits used to provide power to light fixtures on
the runway. In current series circuits, only some ground faults can be detected and no automated
fault location or state of health features are available. Fault location is currently performed with an
isolation tester and a ”divide and conquer”-methodology which is very time consuming and personnel
intensive.
The foundation of this work is based on an extensive literature study, where fault location and
state of health methods used in the power distribution were identified. The method evaluation of
the thesis is based on a... (More)
The purpose of this study is to investigate the feasibility of both online and offline fault location
and state of health technologies for airport series circuits used to provide power to light fixtures on
the runway. In current series circuits, only some ground faults can be detected and no automated
fault location or state of health features are available. Fault location is currently performed with an
isolation tester and a ”divide and conquer”-methodology which is very time consuming and personnel
intensive.
The foundation of this work is based on an extensive literature study, where fault location and
state of health methods used in the power distribution were identified. The method evaluation of
the thesis is based on a concept generation methodology by Karl T. Ulrich and Steven D. Eppinger.
Technical evaluations were performed with primarily LTspice as a simulation tool, time domain re-
flectometry was also tested in the lab and on real series circuits at Arlanda airport.
The results reveal that adopting fault location technologies used in the power distribution industry
for series circuit fault location is very difficult, mainly due to the current transformers placed on the
series circuit and the high-resistance nature of the majority of ground faults. The transformers
pose as impedance discontinuities which contribute with significant high frequency attenuation and
dispersion, which obstructs the utilization of any high frequency transients for fault location purposes.
Ground faults with high resistances in the kΩ-range does not produce any high frequency transients
and does not cause significant steady state-deviations which is problematic for impedance based
fault location methods. Current state of health methods proved to be time consuming and personnel
intensive, but could potentially be beneficial for Safegate engineers who could benchmark existing
cable systems when commissioning new series circuits. Although, large scale tests are recommended
in order to validate these results. Further research into utilizing Airfield Smart power and each
individual fixture for fault location and state of health is also of interest for future work. (Less)
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author
Honkanen, Dennis LU and Anderjon, Simon
supervisor
organization
course
EIE920 20161
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
Fault Location, State of Health, Airfield, Lighting, LED, Fault, Series Circuit
publication/series
CODEN:LUTEDX/TEIE
report number
5376
language
English
id
8884904
date added to LUP
2016-06-27 13:39:57
date last changed
2016-06-27 13:39:57
@misc{8884904,
  abstract     = {The purpose of this study is to investigate the feasibility of both online and offline fault location
and state of health technologies for airport series circuits used to provide power to light fixtures on
the runway. In current series circuits, only some ground faults can be detected and no automated
fault location or state of health features are available. Fault location is currently performed with an
isolation tester and a ”divide and conquer”-methodology which is very time consuming and personnel
intensive.
The foundation of this work is based on an extensive literature study, where fault location and
state of health methods used in the power distribution were identified. The method evaluation of
the thesis is based on a concept generation methodology by Karl T. Ulrich and Steven D. Eppinger.
Technical evaluations were performed with primarily LTspice as a simulation tool, time domain re-
flectometry was also tested in the lab and on real series circuits at Arlanda airport.
The results reveal that adopting fault location technologies used in the power distribution industry
for series circuit fault location is very difficult, mainly due to the current transformers placed on the
series circuit and the high-resistance nature of the majority of ground faults. The transformers
pose as impedance discontinuities which contribute with significant high frequency attenuation and
dispersion, which obstructs the utilization of any high frequency transients for fault location purposes.
Ground faults with high resistances in the kΩ-range does not produce any high frequency transients
and does not cause significant steady state-deviations which is problematic for impedance based
fault location methods. Current state of health methods proved to be time consuming and personnel
intensive, but could potentially be beneficial for Safegate engineers who could benchmark existing
cable systems when commissioning new series circuits. Although, large scale tests are recommended
in order to validate these results. Further research into utilizing Airfield Smart power and each
individual fixture for fault location and state of health is also of interest for future work.},
  author       = {Honkanen, Dennis and Anderjon, Simon},
  keyword      = {Fault Location,State of Health,Airfield,Lighting,LED,Fault,Series Circuit},
  language     = {eng},
  note         = {Student Paper},
  series       = {CODEN:LUTEDX/TEIE},
  title        = {Locating Faults on Energized Airfield Lighting Power Cables},
  year         = {2016},
}