High speed differential protection system for aircraft dc distribution systems incorporating solid state circuit breaking capability

Research output: Contribution to conferenceSpeech

Abstract

The increasing adoption of the more-electric aircraft concept has seen a growth in the proposed use of power electronic systems and DC power distribution in order to attain numerous benefits. These include higher end-to-end power transfer efficiency, reduced power system weight through increased power density, and greater system flexibility and reconfigurability. However, there can also be significant safety challenges arising from an unconventional system fault response, which places challenging operating requirements on any protection systems employed.
This paper presents a high speed current differential implementation approach for dc distribution systems capable of sub-millisecond fault detection. The approach utilizes the natural characteristics of dc differential current measurements to significantly reduce fault detection times compared to standard applications and hence meet requirements for dc converter protection. The paper first presents a review of potential protection issues associated with converter interfaced dc networks on aircraft which may necessitate accelerated protection operation. Options for implementing the proposed technique are then illustrated. Results of scaled hardware testing are presented which validate the overall protection operating times in a low voltage environment. These results show the implementation approach can consistently achieve protection system operation within the order of a few microseconds.

Conference

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

Fingerprint

Fault detection
Aircraft
Networks (circuits)
Electric current measurement
Power electronics
Hardware
Testing
Electric potential

Keywords

  • more-electric aircraft
  • power electronic systems
  • DC power distribution
  • power density
  • system flexibility
  • reconfigurability
  • dc differential current measurements

Cite this

@conference{481a6172271548acbbe529529a27c005,
title = "High speed differential protection system for aircraft dc distribution systems incorporating solid state circuit breaking capability",
abstract = "The increasing adoption of the more-electric aircraft concept has seen a growth in the proposed use of power electronic systems and DC power distribution in order to attain numerous benefits. These include higher end-to-end power transfer efficiency, reduced power system weight through increased power density, and greater system flexibility and reconfigurability. However, there can also be significant safety challenges arising from an unconventional system fault response, which places challenging operating requirements on any protection systems employed.This paper presents a high speed current differential implementation approach for dc distribution systems capable of sub-millisecond fault detection. The approach utilizes the natural characteristics of dc differential current measurements to significantly reduce fault detection times compared to standard applications and hence meet requirements for dc converter protection. The paper first presents a review of potential protection issues associated with converter interfaced dc networks on aircraft which may necessitate accelerated protection operation. Options for implementing the proposed technique are then illustrated. Results of scaled hardware testing are presented which validate the overall protection operating times in a low voltage environment. These results show the implementation approach can consistently achieve protection system operation within the order of a few microseconds.",
keywords = "more-electric aircraft, power electronic systems, DC power distribution, power density, system flexibility, reconfigurability, dc differential current measurements",
author = "Steven Fletcher and Fong, {Chung Man} and Patrick Norman and Stuart Galloway and Graeme Burt",
year = "2015",
month = "9",
day = "22",
language = "English",
note = "SAE 2015 AeroTech Congress & Exhibition ; Conference date: 22-09-2015 Through 24-09-2015",

}

High speed differential protection system for aircraft dc distribution systems incorporating solid state circuit breaking capability. / Fletcher, Steven; Fong, Chung Man; Norman, Patrick; Galloway, Stuart; Burt, Graeme.

2015. SAE 2015 AeroTech Congress & Exhibition, Seattle, United States.

Research output: Contribution to conferenceSpeech

TY - CONF

T1 - High speed differential protection system for aircraft dc distribution systems incorporating solid state circuit breaking capability

AU - Fletcher, Steven

AU - Fong, Chung Man

AU - Norman, Patrick

AU - Galloway, Stuart

AU - Burt, Graeme

PY - 2015/9/22

Y1 - 2015/9/22

N2 - The increasing adoption of the more-electric aircraft concept has seen a growth in the proposed use of power electronic systems and DC power distribution in order to attain numerous benefits. These include higher end-to-end power transfer efficiency, reduced power system weight through increased power density, and greater system flexibility and reconfigurability. However, there can also be significant safety challenges arising from an unconventional system fault response, which places challenging operating requirements on any protection systems employed.This paper presents a high speed current differential implementation approach for dc distribution systems capable of sub-millisecond fault detection. The approach utilizes the natural characteristics of dc differential current measurements to significantly reduce fault detection times compared to standard applications and hence meet requirements for dc converter protection. The paper first presents a review of potential protection issues associated with converter interfaced dc networks on aircraft which may necessitate accelerated protection operation. Options for implementing the proposed technique are then illustrated. Results of scaled hardware testing are presented which validate the overall protection operating times in a low voltage environment. These results show the implementation approach can consistently achieve protection system operation within the order of a few microseconds.

AB - The increasing adoption of the more-electric aircraft concept has seen a growth in the proposed use of power electronic systems and DC power distribution in order to attain numerous benefits. These include higher end-to-end power transfer efficiency, reduced power system weight through increased power density, and greater system flexibility and reconfigurability. However, there can also be significant safety challenges arising from an unconventional system fault response, which places challenging operating requirements on any protection systems employed.This paper presents a high speed current differential implementation approach for dc distribution systems capable of sub-millisecond fault detection. The approach utilizes the natural characteristics of dc differential current measurements to significantly reduce fault detection times compared to standard applications and hence meet requirements for dc converter protection. The paper first presents a review of potential protection issues associated with converter interfaced dc networks on aircraft which may necessitate accelerated protection operation. Options for implementing the proposed technique are then illustrated. Results of scaled hardware testing are presented which validate the overall protection operating times in a low voltage environment. These results show the implementation approach can consistently achieve protection system operation within the order of a few microseconds.

KW - more-electric aircraft

KW - power electronic systems

KW - DC power distribution

KW - power density

KW - system flexibility

KW - reconfigurability

KW - dc differential current measurements

UR - http://www.sae.org/events/atc/2015/

M3 - Speech

ER -