Research on Long-interval Sparse Partial Discharge in GIS and Its Sudden Breakdown

DONG Jianxin; LIU Jiangming; LI Yujie; LIU Changbiao; TANG Zhiguo; TANG Mingze; TAO Yiran

doi:10.13296/j.1001-1609.hva.2018.11.009

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Research on Long-interval Sparse Partial Discharge in GIS and Its Sudden Breakdown

更新时间：2025-04-26

- Research on Long-interval Sparse Partial Discharge in GIS and Its Sudden Breakdown
- High VoltageApparatus Vol. 54, Issue 11, Pages: 73-79+85(2018)
- 作者机构：
  
  1. 国网浙江省电力有限公司检修分公司
  2. 华北电力大学高电压与电磁兼容北京市重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.11.009
  CLC： TM855
- Published：2018
- 稿件说明：
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[1]董建新,刘江明,郦于杰,刘昌标,唐志国,唐铭泽,陶亦然.GIS绝缘子表面金属异物缺陷长间歇稀疏性局放检测研究[J].高压电器,2018,54(11):73-79+85.

DONG Jianxin, LIU Jiangming, LI Yujie, et al. Research on Long-interval Sparse Partial Discharge in GIS and Its Sudden Breakdown[J]. High voltageapparatus, 2018, 54(11): 73-79+85.
[1]董建新,刘江明,郦于杰,刘昌标,唐志国,唐铭泽,陶亦然.GIS绝缘子表面金属异物缺陷长间歇稀疏性局放检测研究[J].高压电器,2018,54(11):73-79+85. DOI： 10.13296/j.1001-1609.hva.2018.11.009.

DONG Jianxin, LIU Jiangming, LI Yujie, et al. Research on Long-interval Sparse Partial Discharge in GIS and Its Sudden Breakdown[J]. High voltageapparatus, 2018, 54(11): 73-79+85. DOI： 10.13296/j.1001-1609.hva.2018.11.009.

摘要

局部放电检测是GIS带电检测的重要手段

在工程应用中发现了大量缺陷。同时

现有局部放电检测技术也暴露出误报漏报的问题

特别是无法及时发现某些GIS突发性击穿或闪络故障的征兆。为此

文中分析了现有局放检测和诊断技术的特点和不足

进而提出有些GIS突发性击穿或闪络由长间歇的稀疏性放电不断累积所引发的假设;在实验室通过GIS盆式绝缘子表面缺陷模型验证了长时间间隔稀疏性放电的存在

深入研究了此类放电的时序统计特性和PRPS、PRPD图谱特征;针对某特高压变电站GIS

通过现场带电检测发现了一起绝缘子长间歇的稀疏性放电案例

并对比研究了该放电缺陷的时序统计和PRPD图谱特征。通过实验室和工程现场对长间歇稀疏性放电的实测验证

初步证实了GIS突发性击穿或闪络的可能原因

为GIS设备此类突发性故障的检测和预警提供了新思路。

Abstract

Partial discharge（PD）detection is applied to on-line live monitoring of gas insulated switchgear（GIS）.However

false alarm and missing alarm often happen

particularly some sudden breakdown or flash-over occurredin GIS could not be detected in time. In this study

the shortcomings of current PD detection and diagnosis technolo-gies were analyzed

then an assumption was put forward that some sudden breakdown or flash-over of GIS might beinduced by accumulated long-interval sparse partial discharge

which was not detected by PD detection devices. Asurface defect PD model on GIS spacer was established in laboratory to demonstrate the existence of the long-intervalsparse partial discharge when long time and relatively low voltage was applied on the PD model. The statistic proper-ties of the time sequence of PD pulses and the phase resolved partial discharge（PRPD）spectrum were analyzed. Fur-ther

an on-site live detection of PD was performed for a real UHV GIS

and a doubtful cavity long-interval dischargewas detected. The time sequence features and PRPD spectrum of the discharge were comparatively studied. This study may facilitate effective detection and early warning of this kind of sudden breakdown or flash-over of GIS.

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