Motion Behavior and Discharge Characteristics of Flake Metal Particles in GIS Under Electro-mechanical Coupling Effects

ZHAO Yingying; SI Wenrong; FU Chenzhao; SHI Tianyi; HAN Xutao; LI Junhao

doi:10.13296/j.1001-1609.hva.2025.10.001

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Motion Behavior and Discharge Characteristics of Flake Metal Particles in GIS Under Electro-mechanical Coupling Effects

Key New Technologies for Equipment Condition Monitoring and Fault Diagnosis in New Power System Research on Fault Mechanisms of Key Power Equipment in New Power System | 更新时间：2025-10-21

- Motion Behavior and Discharge Characteristics of Flake Metal Particles in GIS Under Electro-mechanical Coupling Effects
- High Voltage Apparatus Vol. 61, Issue 10, Pages: 1-10(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2025.10.001
  CLC：
- Received：28 March 2025，
  
  Revised：2025-06-07，
  
  Published：16 October 2025
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ZHAO Yingying, SI Wenrong, FU Chenzhao, et al. Motion Behavior and Discharge Characteristics of Flake Metal Particles in GIS Under Electro-mechanical Coupling Effects[J]. High voltage apparatus, 2025, 61(10): 1-10.
DOI：

ZHAO Yingying, SI Wenrong, FU Chenzhao, et al. Motion Behavior and Discharge Characteristics of Flake Metal Particles in GIS Under Electro-mechanical Coupling Effects[J]. High voltage apparatus, 2025, 61(10): 1-10. DOI： 10.13296/j.1001-1609.hva.2025.10.001.

摘要

片形金属微粒是气体绝缘开关设备（gas-insulated switchgear，GIS）内部常见的潜在缺陷，其在电场作用下的运动及放电行为可能引发绝缘失效，威胁设备安全。现有研究主要关注电场单独作用下的微粒运动，而稳态机械振动的影响尚缺乏系统研究。文中搭建了可同时施加高电压与机械振动的GIS缩比实验平台，研究了机—电联合作用下片形金属微粒的运动模式及其放电特性。实验结果表明，微粒的起跳—停跳特性受质量及形状影响显著，趋向正方形的颗粒起跳场强较高（0.80～1.1 kV/mm），趋向线形的颗粒起跳场强较低（0.55～0.70 kV/mm），而振动对起跳特性的影响可忽略。起跳后的微粒表现出3种典型运动模式，且随振动幅值增大运动更为剧烈。放电分析表明，微粒质量增大时，其最大视在放电量由线性关系向指数关系演变，且多个片形微粒共存时可能诱发链式击穿，导致放电脉冲密集化。研究结果揭示了稳态机械振动对片形微粒运动及放电行为的影响，为GIS内部金属微粒缺陷的评估及抑制提供了实验依据。

Abstract

Flake metal particles are a common potential defect within gas-insulated switchgear (GIS)

where their motion and discharge behavior under electric fields may lead to insulation failure

thereby posing a significant threat to equipment reliability. The current studies mainly focus on particle dynamics under electric fields alone

while the influence of steady-state mechanical vibrations remains inadequately explored. In this paper a scaled GIS experimental platform capable of simultaneously applying high voltage and mechanical vibration is set up to investigate the motion patterns and discharge characteristics of flake metal particles under electro-mechanical coupling effects. Experimental results indicate that the jumping and resting characteristics of the particles are significantly influenced by their mass and shape. Particles approaching a square geometry exhibit higher jumping electric field thresholds (0.80～1.1 kV/mm)

whereas those with linear shapes demonstrate lower thresholds (0.55～0.70 kV/mm)

with the effect of vibration on the jumping threshold being negligible. The particles

once jumping

exhibit three typical motion patterns and the motion is more intense with the increase of vibration amplitude. Discharge analysis reveals that as particle mass increases，its maximum apparent discharge magnitude has evolved from a linear to an exponential relationship. Moreover，coexistance of multiple flake particles can induce chain breakdown，resulting in a denser discharge pulse pattern. These findings reveal the impact of steady-state mechanical vibration on particle motion and discharge behavior，providing an experimental basis for the assessment and mitigation of metal particle defects in GIS.

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