AC/DC converter with DC fault suppression for aircraft +/- 270 VDC distribution systems

Research output: Contribution to conferencePaper

3 Citations (Scopus)

Abstract

The increasing electrical demand in commercial and military aircraft justifies a growing need for higher voltage DC primary distribution systems. A DC system offers reduced power losses and space savings, which is of major importance for aircraft manufacturers. At present, challenges associated with DC systems include reliable fast acting short circuit protection. Solid State Contactors (SSC) have gained wide acceptance in traditional 28 VDC secondary systems for DC fault interruption. However, the reliable operation at higher operating voltages and currents requires further technology maturation.

This paper examines a supporting method to SSC for more reliable fault mitigation by investigating bidirectional AC/DC converter topology with DC fault current blocking capability. Replacement of semiconductor switches with full bridge cells allows instant reversal of voltage polarities to limit rapid capacitor discharge and machine inductive currents. Demonstration of this capability is realized by tracking DC fault currents in time-domain simulations of a ±270 VDC converter dynamic model built in MATLAB-Simulink.

Simulation results have shown that the modified power converter topology provides a fast response to DC faults and it can be considered as a back-up to SSCs in clearing faults in ±270 VDC distribution systems.
LanguageEnglish
Number of pages12
DOIs
Publication statusPublished - 15 Sep 2015
EventSAE 2015 AeroTech Congress & Exhibition - Seattle, United States
Duration: 22 Sep 201524 Sep 2015

Conference

ConferenceSAE 2015 AeroTech Congress & Exhibition
CountryUnited States
CitySeattle
Period22/09/1524/09/15

Fingerprint

Electric fault currents
Aircraft
Electric potential
Topology
Semiconductor switches
Military aircraft
Power converters
Short circuit currents
MATLAB
Dynamic models
Capacitors
Demonstrations

Keywords

  • DC primary distribution systems
  • short circuit protection
  • solid state contactors
  • DC fault interruption
  • fault mitigation
  • bidirectional AC/DC converter topology
  • DC fault current blocking capability
  • bridge cells
  • capacitor discharge
  • machine inductive currents

Cite this

Sztykiel, Michal ; Fletcher, Steven ; Norman, Patrick ; Galloway, Stuart ; Burt, Graeme. / AC/DC converter with DC fault suppression for aircraft +/- 270 VDC distribution systems. Paper presented at SAE 2015 AeroTech Congress & Exhibition, Seattle, United States.12 p.
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title = "AC/DC converter with DC fault suppression for aircraft +/- 270 VDC distribution systems",
abstract = "The increasing electrical demand in commercial and military aircraft justifies a growing need for higher voltage DC primary distribution systems. A DC system offers reduced power losses and space savings, which is of major importance for aircraft manufacturers. At present, challenges associated with DC systems include reliable fast acting short circuit protection. Solid State Contactors (SSC) have gained wide acceptance in traditional 28 VDC secondary systems for DC fault interruption. However, the reliable operation at higher operating voltages and currents requires further technology maturation.This paper examines a supporting method to SSC for more reliable fault mitigation by investigating bidirectional AC/DC converter topology with DC fault current blocking capability. Replacement of semiconductor switches with full bridge cells allows instant reversal of voltage polarities to limit rapid capacitor discharge and machine inductive currents. Demonstration of this capability is realized by tracking DC fault currents in time-domain simulations of a ±270 VDC converter dynamic model built in MATLAB-Simulink.Simulation results have shown that the modified power converter topology provides a fast response to DC faults and it can be considered as a back-up to SSCs in clearing faults in ±270 VDC distribution systems.",
keywords = "DC primary distribution systems, short circuit protection, solid state contactors, DC fault interruption, fault mitigation, bidirectional AC/DC converter topology, DC fault current blocking capability, bridge cells, capacitor discharge, machine inductive currents",
author = "Michal Sztykiel and Steven Fletcher and Patrick Norman and Stuart Galloway and Graeme Burt",
note = "Reprinted with Permission from SAE International. Sztykiel, M., Fletcher, S., Norman, P., Galloway, S., & Burt, G. (2015). AC/DC converter with DC fault suppression for aircraft +/- 270 VDC distribution systems. Paper presented at SAE 2015 AeroTech Congress & Exhibition, Seattle, United States. https://dx.doi.org/10.4271/2015-01-2411; SAE 2015 AeroTech Congress & Exhibition ; Conference date: 22-09-2015 Through 24-09-2015",
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Sztykiel, M, Fletcher, S, Norman, P, Galloway, S & Burt, G 2015, 'AC/DC converter with DC fault suppression for aircraft +/- 270 VDC distribution systems' Paper presented at SAE 2015 AeroTech Congress & Exhibition, Seattle, United States, 22/09/15 - 24/09/15, . https://doi.org/10.4271/2015-01-2411

AC/DC converter with DC fault suppression for aircraft +/- 270 VDC distribution systems. / Sztykiel, Michal; Fletcher, Steven; Norman, Patrick; Galloway, Stuart; Burt, Graeme.

2015. Paper presented at SAE 2015 AeroTech Congress & Exhibition, Seattle, United States.

Research output: Contribution to conferencePaper

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T1 - AC/DC converter with DC fault suppression for aircraft +/- 270 VDC distribution systems

AU - Sztykiel, Michal

AU - Fletcher, Steven

AU - Norman, Patrick

AU - Galloway, Stuart

AU - Burt, Graeme

N1 - Reprinted with Permission from SAE International. Sztykiel, M., Fletcher, S., Norman, P., Galloway, S., & Burt, G. (2015). AC/DC converter with DC fault suppression for aircraft +/- 270 VDC distribution systems. Paper presented at SAE 2015 AeroTech Congress & Exhibition, Seattle, United States. https://dx.doi.org/10.4271/2015-01-2411

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N2 - The increasing electrical demand in commercial and military aircraft justifies a growing need for higher voltage DC primary distribution systems. A DC system offers reduced power losses and space savings, which is of major importance for aircraft manufacturers. At present, challenges associated with DC systems include reliable fast acting short circuit protection. Solid State Contactors (SSC) have gained wide acceptance in traditional 28 VDC secondary systems for DC fault interruption. However, the reliable operation at higher operating voltages and currents requires further technology maturation.This paper examines a supporting method to SSC for more reliable fault mitigation by investigating bidirectional AC/DC converter topology with DC fault current blocking capability. Replacement of semiconductor switches with full bridge cells allows instant reversal of voltage polarities to limit rapid capacitor discharge and machine inductive currents. Demonstration of this capability is realized by tracking DC fault currents in time-domain simulations of a ±270 VDC converter dynamic model built in MATLAB-Simulink.Simulation results have shown that the modified power converter topology provides a fast response to DC faults and it can be considered as a back-up to SSCs in clearing faults in ±270 VDC distribution systems.

AB - The increasing electrical demand in commercial and military aircraft justifies a growing need for higher voltage DC primary distribution systems. A DC system offers reduced power losses and space savings, which is of major importance for aircraft manufacturers. At present, challenges associated with DC systems include reliable fast acting short circuit protection. Solid State Contactors (SSC) have gained wide acceptance in traditional 28 VDC secondary systems for DC fault interruption. However, the reliable operation at higher operating voltages and currents requires further technology maturation.This paper examines a supporting method to SSC for more reliable fault mitigation by investigating bidirectional AC/DC converter topology with DC fault current blocking capability. Replacement of semiconductor switches with full bridge cells allows instant reversal of voltage polarities to limit rapid capacitor discharge and machine inductive currents. Demonstration of this capability is realized by tracking DC fault currents in time-domain simulations of a ±270 VDC converter dynamic model built in MATLAB-Simulink.Simulation results have shown that the modified power converter topology provides a fast response to DC faults and it can be considered as a back-up to SSCs in clearing faults in ±270 VDC distribution systems.

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KW - DC fault interruption

KW - fault mitigation

KW - bidirectional AC/DC converter topology

KW - DC fault current blocking capability

KW - bridge cells

KW - capacitor discharge

KW - machine inductive currents

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