A high-impedance fault detection scheme for DC aircrafts based on comb filter and second derivative of voltage

Navid Bayati*, Mehdi Savaghebi

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Faults in a DC aircraft power system typically lead to serious equipment damage, which severely threatens the safety of the whole aircraft system. A fast and accurate real-time fault detection scheme is necessary for aircraft power systems to provide high reliability in the system. In this paper, a new fault detection device (FDD) is proposed based on the comb filter and second derivative of the system voltage to detect both low and high-impedance faults (HIFs) in a fast way. The proposed method utilizes the comb filter in the middle of the two first derivatives to detect both high and low-impedance faults within several microseconds. For demonstrating the efficiency, authenticity, and compatibility of the proposed method, digital time-domain simulations are carried out and verified by real-time simulations using an OPAL-RT simulator under different scenarios such as low- and high-impedance fault, overload, and motor starting to verify distinguishing between non-fault disturbances and faults. The results, which are compared with reported methods, prove the accuracy and speed of the proposed FDD in a DC aircraft.
Original languageEnglish
Article number100073
JournalGreen Energy and Intelligent Transportation
Volume2
Issue number2
Number of pages9
ISSN2773-1537
DOIs
Publication statusPublished - 2023

Keywords

  • Protection
  • DC aircraft
  • Fault detection
  • Signal processing

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