Detection and Analysis of Partial Discharge of Metal Protrusion Defects in GIS Based on UHF Method

HAO Shuguang; LI Lu; ZHANG Weizheng; ZHAO Shengnan; GAO Nannan; HE Cong; LI Junhao

doi:10.13296/j.1001-1609.hva.2020.06.013

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Detection and Analysis of Partial Discharge of Metal Protrusion Defects in GIS Based on UHF Method

更新时间：2025-04-26

- Detection and Analysis of Partial Discharge of Metal Protrusion Defects in GIS Based on UHF Method
- High VoltageApparatus Vol. 56, Issue 6, Pages: 88-92(2020)
- 作者机构：
  
  1. 国网河南省电力公司检修公司
  2. 国网技术学院
  3. 西安交通大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.06.013
  CLC： TM855
- Published：2020
- 稿件说明：
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[1]郝曙光,李璐,张伟政,赵胜男,高楠楠,何聪,李军浩.基于特高频法的GIS金属尖端缺陷局部放电检测和分析[J].高压电器,2020,56(06):88-92.

HAO Shuguang, LI Lu, ZHANG Weizheng, et al. Detection and Analysis of Partial Discharge of Metal Protrusion Defects in GIS Based on UHF Method[J]. High voltageapparatus, 2020, 56(6): 88-92.
[1]郝曙光,李璐,张伟政,赵胜男,高楠楠,何聪,李军浩.基于特高频法的GIS金属尖端缺陷局部放电检测和分析[J].高压电器,2020,56(06):88-92. DOI： 10.13296/j.1001-1609.hva.2020.06.013.

HAO Shuguang, LI Lu, ZHANG Weizheng, et al. Detection and Analysis of Partial Discharge of Metal Protrusion Defects in GIS Based on UHF Method[J]. High voltageapparatus, 2020, 56(6): 88-92. DOI： 10.13296/j.1001-1609.hva.2020.06.013.

摘要

金属尖刺缺陷作为GIS内部常见的绝缘缺陷之一

严重威胁GIS的安全稳定运行。文中基于特高频局部放电检测方法研究了GIS内部导杆和外壳上金属尖刺缺陷的局部放电特性。在导杆上设计了长度为3.5、6、12 mm的尖端缺陷

在外壳上设计了长度为12 mm的尖端缺陷;通过逐步升压法对不同部位、不同尺寸缺陷下的特高频局部放电信号进行了测量;结合局部放电信号PRPD谱图对不同部位、不同尺寸下的局部放电特性进行了分析。试验结果表明

GIS内部的金属尖端缺陷不同电压下的放电呈现不同的特征

放电首先出现在交流电压负半周

然后出现在交流电压正半周。缺陷的尺寸对放电特性影响显著;不同位置的尖刺缺陷局部放电特征明显不同。

Abstract

As one of the common insulation defects in GIS

metal protrusion defects seriously threaten the safe andstable operation of GIS. Based on the UHF partial discharge detection method

the partial discharge characteristicsof metal protrusion defects on the internal line and the shell of GIS are studied in this paper. A metal protrusion de-fects with a length of 3.5 mm

6 mm

and 12 mm are designed on the internal line

and metal protrusion defects witha length of 12 mm are designed on the shell. The UHF PDs under different positions and different sizes is measuredby g the step-up method. The characteristics of partial discharges at different locations and sizes are analyzed withPRPD spectra. The test results show that partial discharge of the metal protrusion defects in GIS pass through fourstages to breakdown;the size of the defect has a significant effect on the discharge characteristics;the local of met-al protrusion defects are also effect the discharge characteristics.

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