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Localization of partial electrical discharges using compressive spherical frequency-difference beamforming.

Jeung-Hoon Lee1, Yongsung Park2, Peter Gerstoft2

  • 1School of Mechanical Engineering, Changwon National University, Uichang-gu, Changwon, 51140, South Korea.

The Journal of the Acoustical Society of America
|October 23, 2024
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Summary
This summary is machine-generated.

This study enhances partial electrical discharge localization using acoustic sensors and advanced beamforming. The new method improves accuracy for high-voltage systems by addressing near-field challenges and wave biases.

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Area of Science:

  • Electrical Engineering
  • Acoustics
  • Signal Processing

Background:

  • Accurate localization of partial electrical discharges (PD) is critical for diagnosing high-voltage systems.
  • Ultrasonic sound emission during PD events necessitates sophisticated localization techniques to avoid spatial aliasing.
  • Existing compressive frequency-difference beamforming methods show promise but require expansion for near-field applications.

Purpose of the Study:

  • To develop an improved method for accurate near-field localization of partial electrical discharges.
  • To adapt compressive frequency-difference beamforming for spherical wave analysis.
  • To enhance localization accuracy by mitigating biases from nonplanar waves.

Main Methods:

  • Utilized an acoustic sensor array and an expanded compressive frequency-difference beamforming approach.
  • Incorporated spherical wave analysis for near-field scenarios.
  • Implemented a two-step normalization process to standardize field variables and preserve phase/relative amplitude.
  • Employed a distributed algorithm based on the alternating direction multiplier method for convex optimization.

Main Results:

  • The proposed method successfully extends near-field localization capabilities for partial electrical discharges.
  • The two-step normalization effectively eliminates bias from nonplanar waves.
  • The distributed optimization algorithm efficiently solves the complex problem.
  • Validation was achieved using both simulated and experimental data.

Conclusions:

  • The enhanced beamforming technique provides accurate near-field localization of partial electrical discharges.
  • This advancement is crucial for improved diagnostics and maintenance of high-voltage equipment.
  • The method offers a robust solution for challenging acoustic localization problems in complex environments.