Development Features of Ultrasonic Partial Discharge of Metal Point Defect with Different Lengths in GIS

SHI Wen; YANG Zhengli; HUANG Qixin; CHEN Haixia; LU Zhuwei; WU Fuyun

doi:10.13296/j.1001-1609.hva.2018.11.010

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Development Features of Ultrasonic Partial Discharge of Metal Point Defect with Different Lengths in GIS

更新时间：2025-04-26

- Development Features of Ultrasonic Partial Discharge of Metal Point Defect with Different Lengths in GIS
- High VoltageApparatus Vol. 54, Issue 11, Pages: 80-85(2018)
- 作者机构：
  
  三江学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.11.010
  CLC： TM855
- Published：2018
- 稿件说明：
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[1]史文,杨正理,黄其新,陈海霞,陆朱卫,吴馥云.GIS中不同长度金属尖端缺陷超声波局部放电发展特性研究[J].高压电器,2018,54(11):80-85.

SHI Wen, YANG Zhengli, HUANG Qixin, et al. Development Features of Ultrasonic Partial Discharge of Metal Point Defect with Different Lengths in GIS[J]. High voltageapparatus, 2018, 54(11): 80-85.
[1]史文,杨正理,黄其新,陈海霞,陆朱卫,吴馥云.GIS中不同长度金属尖端缺陷超声波局部放电发展特性研究[J].高压电器,2018,54(11):80-85. DOI： 10.13296/j.1001-1609.hva.2018.11.010.

SHI Wen, YANG Zhengli, HUANG Qixin, et al. Development Features of Ultrasonic Partial Discharge of Metal Point Defect with Different Lengths in GIS[J]. High voltageapparatus, 2018, 54(11): 80-85. DOI： 10.13296/j.1001-1609.hva.2018.11.010.

摘要

气体绝缘组合电器设备（gas insulated switchgear

GIS）因具有占地面积小、可靠性高等优点在电力系统获得了广泛应用。GIS设备在制造或安装过程中可能在高压导体产生金属尖端缺陷

进而在运行过程中产生局部放电

持续的局部放电会导致绝缘击穿

影响设备运行。针对GIS高压导体金属尖端缺陷局部放电特性

文中在实体GIS高压导体上设置了不同长度的金属尖端缺陷

利用超声波法对其从局放起始到绝缘击穿整个过程中的局放信号进行了测量

结果表明

随着电压的升高局放过程可分为局放起始阶段、局放相位转换阶段、局放发展阶段及临界击穿阶段

不同长度的缺陷其发展阶段类似

但其局放起始电压及放电强度不同。

Abstract

Gas insulated switchgear（GIS）may contain metal point defect on high-voltage conductors during manufacturing or installation

and the defect may cause partial discharge（PD）during GIS operation. Continuous PD maylead to insulation breakdown and affect equipment operation. Aiming at the PD characteristics of metal point defecton GIS high-voltage conductors

this study set metal point defects of different lengths on the high-voltage conductorsof a real GIS. The PD signals from initial discharge to insulation breakdown were measured by the ultrasonic method

and the results show that with the increase of voltage

the PD process can be divided into PD initial stage

PD phaseconversion stage

PD development stage and critical insulation breakdown stage. The defects of different lengths have similar development stages

but their PD inception voltages and discharge intensities are different.

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