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A gas spark switch electrode impact pressure test platform.

Cheng Luo1, Yongmin Zhang1, Yong Lu1

  • 1State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, Shaanxi, China.

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|August 6, 2024
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Summary
This summary is machine-generated.

A novel piezoelectric sensor system accurately measures electrode stress in high-current gas spark switches. This system overcomes electromagnetic interference, revealing shock formation during current buildup and factors influencing stress waveforms.

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Physics

Background:

  • High-current gas spark switches generate significant mechanical stress on electrodes.
  • Accurate measurement of this stress is crucial for switch design and discharge theory.
  • Traditional methods are hindered by electromagnetic interference and high voltages.

Purpose of the Study:

  • To design and validate a robust electrode impact stress measurement system.
  • To overcome limitations of conventional stress measurement techniques in harsh discharge environments.
  • To analyze the characteristics of electrode stress waveforms under various discharge conditions.

Main Methods:

  • Development of a stress measurement system utilizing PVDF (Polyvinylidene fluoride) piezoelectric film.
  • Implementation of the system to measure electrode stress in a high-voltage, high-current gas spark switch.
  • Experimental investigation of stress waveforms under varying pulse capacitor values, breakdown voltages, and loads.

Main Results:

  • The PVDF-based system successfully measured electrode impact pressure in high-current gas spark switch discharges.
  • Stress waveform analysis indicated shock formation occurs during the initial current buildup phase.
  • Measured waveforms revealed significant magnetic field force contributions and dependence on peak current, dI/dt, and discharge duration.

Conclusions:

  • The PVDF piezoelectric film system offers a viable solution for measuring electrode stress in high-current, high-voltage spark discharges.
  • The study provides insights into the dynamic mechanical effects on electrodes during spark discharge.
  • Understanding these effects is critical for optimizing gas spark switch performance and longevity.