Electrical and thermal effects of fault currents in aircraft electrical power systems with composite aero-structures

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Abstract

The upwards trend for the use of electrical power on state of the art aircraft is resulting in significant change to the design of power system architectures and protection systems for these platforms. There is a pull from the aerospace industry to integrate the electrical power system with the aircraft’s structural materials to form an embedded system, reducing the need for bulky cable harnesses. This directly impacts the fault response for ground faults and ultimately the development of appropriate protection systems. Such structural materials include composites such as carbon fibre reinforced polymer (CFRP). This paper presents the experimental capture and analysis of the response of CFRP to electrical fault current, which indicates the need for two distinct sets of electrical ground fault detection criteria for low and high resistance faults and identifies the threshold resistance for this distinction. By extrapolating these results to develop models of CFRP for use in transient simulation studies, the key electrical fault detection thresholds for speed, selectivity and sensitivity for a DC system rail to ground fault through CFRP are identified. This provides the first set of key factors for electrical fault detection through CFRP, providing a platform for the design of fully integrated structural and electrical power systems, with appropriate electrical protection systems.
LanguageEnglish
Number of pages10
JournalIEEE Transactions on Transportation Electrification
Early online date7 May 2018
DOIs
Publication statusE-pub ahead of print - 7 May 2018

Fingerprint

Electric fault currents
Thermal effects
Carbon fibers
Aircraft
Fault detection
Composite materials
Polymers
Aircraft materials
Aerospace industry
Embedded systems
Rails
Cables

Keywords

  • carbon fibre reinforced polymer
  • electrical protection
  • more-electric aircraft
  • CFRP
  • electrical fault detection
  • aerospace electronics

Cite this

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title = "Electrical and thermal effects of fault currents in aircraft electrical power systems with composite aero-structures",
abstract = "The upwards trend for the use of electrical power on state of the art aircraft is resulting in significant change to the design of power system architectures and protection systems for these platforms. There is a pull from the aerospace industry to integrate the electrical power system with the aircraft’s structural materials to form an embedded system, reducing the need for bulky cable harnesses. This directly impacts the fault response for ground faults and ultimately the development of appropriate protection systems. Such structural materials include composites such as carbon fibre reinforced polymer (CFRP). This paper presents the experimental capture and analysis of the response of CFRP to electrical fault current, which indicates the need for two distinct sets of electrical ground fault detection criteria for low and high resistance faults and identifies the threshold resistance for this distinction. By extrapolating these results to develop models of CFRP for use in transient simulation studies, the key electrical fault detection thresholds for speed, selectivity and sensitivity for a DC system rail to ground fault through CFRP are identified. This provides the first set of key factors for electrical fault detection through CFRP, providing a platform for the design of fully integrated structural and electrical power systems, with appropriate electrical protection systems.",
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author = "Jones, {Catherine E.} and Norman, {Patrick J.} and Michal Sztykiel and {Pe{\~n}a Alzola}, Rafael and Burt, {Graeme M.} and Galloway, {Stuart J.} and Kawashita, {Luiz F.} and Hallett, {Stephen R.}",
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