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Designing a Capacitive Sensor to Detect Series Arcs in Aircraft HVDC Electrical Systems.

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Summary

A new capacitive sensor effectively detects series arc faults in high-voltage DC systems for electric aircraft. This technology enhances safety and reliability for more electric aircraft (MEA) and all-electric aircraft (AEA) applications.

Keywords:
aircraftcapacitive couplingcapacitive sensorpower systemssensor designseries arc

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Area of Science:

  • Electrical Engineering
  • Aerospace Engineering
  • Materials Science

Background:

  • The shift to more electric aircraft (MEA) and all-electric aircraft (AEA) necessitates high-voltage DC (HVDC) systems.
  • HVDC systems face challenges in insulation reliability and detecting in-flight series arc faults.
  • Early detection of arc faults is critical for safety in aerospace applications.

Purpose of the Study:

  • To design and evaluate a capacitive sensor for detecting series arc faults in aerospace HVDC systems.
  • To validate the sensor model through simulations and experimental measurements.
  • To assess the sensor's performance under realistic operating conditions.

Main Methods:

  • Development of a capacitive sensor model.
  • Validation of the model using step response tests (simulations and experiments).
  • Generation of laboratory series arcs to test sensor performance with varying signal dynamics.

Main Results:

  • The sensor model demonstrated excellent agreement with experimental results.
  • The sensor showed effective detection of series arc faults under realistic conditions.
  • The capacitive coupling value and high-frequency response were validated.

Conclusions:

  • Capacitive sensing is a feasible method for early arc fault detection in HVDC aerospace systems.
  • The developed sensor is suitable for the compact, lightweight, and safety-critical environments of MEA and AEA.
  • The proposed sensor offers non-intrusive detection, enhancing the safety of future electric aircraft.