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April 20, 2026IEEE Transactions on Dielectrics and Electrical Insulation

Sampling-Rate Enhancement of φ-OTDR Systems for Acoustic Emission Detection of Partial Discharges in GIS

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Authors

HZHongyang ZhouJCJiawen ChengZRZhengyu Ren

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Overview

Experiments demonstrate enhanced acoustic emission detection in gas-insulated switchgear, indicating improved monitoring capabilities.

Key Points

  • The aim is to enhance the sampling rate of φ-OTDR systems used for detecting partial discharges in GIS.
  • Developed a φ-OTDR system with an auxiliary fiber loop to increase effective sampling rate.
  • Utilized periodic probe pulse injection with fixed frequency shifts for multiplexing.
  • Conducted experiments on a 110 kV GIS system to validate the approach.
  • Achieved effective acoustic-signal sampling rate of 800 kHz.
  • Enabled distributed sensing at 24 points within the GIS.
  • Successfully detected metallic particle partial discharge defects with 4 dB higher signal-to-noise ratio compared to conventional methods.

Cite This Study

Zhou et al. (2026) studied this question.

synapsesocial.com/papers/69e5c1c203c29399140287d2https://doi.org/10.1109/tdei.2026.3684784
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