Diagnosis and Routine Test Analysis of Air Gap Partial Discharge at the Interface of the Three-pillar Insulator in the GIL

LI Weiguo; ZHANG Changhong; YANG Xu; XI Shengyu; HUANG Zhongkang; CHU Jinwei; NAN Zhenle

doi:10.13296/j.1001-1609.hva.2020.08.034

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Diagnosis and Routine Test Analysis of Air Gap Partial Discharge at the Interface of the Three-pillar Insulator in the GIL

更新时间：2025-04-26

- Diagnosis and Routine Test Analysis of Air Gap Partial Discharge at the Interface of the Three-pillar Insulator in the GIL
- High VoltageApparatus Vol. 56, Issue 8, Pages: 224-229(2020)
- 作者机构：
  
  1. 南方电网超高压输电公司检修试验中心
  2. 华南理工大学电力学院
  3. 西安西电开关电气有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.08.034
  CLC： TM855
- Published：2020
- 稿件说明：
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[1]黎卫国,张长虹,杨旭,奚圣羽,黄忠康,楚金伟,南振乐.GIL设备三支柱绝缘子界面气隙局放诊断与出厂检测分析[J].高压电器,2020,56(08):224-229.

LI Weiguo, ZHANG Changhong, YANG Xu, et al. Diagnosis and Routine Test Analysis of Air Gap Partial Discharge at the Interface of the Three-pillar Insulator in the GIL[J]. High voltageapparatus, 2020, 56(8): 224-229.
[1]黎卫国,张长虹,杨旭,奚圣羽,黄忠康,楚金伟,南振乐.GIL设备三支柱绝缘子界面气隙局放诊断与出厂检测分析[J].高压电器,2020,56(08):224-229. DOI： 10.13296/j.1001-1609.hva.2020.08.034.

LI Weiguo, ZHANG Changhong, YANG Xu, et al. Diagnosis and Routine Test Analysis of Air Gap Partial Discharge at the Interface of the Three-pillar Insulator in the GIL[J]. High voltageapparatus, 2020, 56(8): 224-229. DOI： 10.13296/j.1001-1609.hva.2020.08.034.

摘要

超声波局放检测法是现场判断GIL设备绝缘状态的重要手段。文中利用超声波检测法开展PE换流站GIL设备局放带电测试

发现11起异常信号

为了查明局放信号异常原因

现场开展机械振动、外部电晕干扰等排查

分析信号特征

返厂开展试验验证

解体故障定位

缺陷模拟测试等。研究表明:GIL设备存在界面气隙时超声波局放信号图谱特征为出现50 Hz和100 Hz频率相关性信号

且50 Hz频率相关性较小

100 Hz频率相关性强烈

相位模式出现正弦相关性波形

一个周期内有两簇较集中的信号聚集点。结合现场测试和返厂试验分析结果

文中提出了GIL设备现场局放测试判断方法和排除界面气隙缺陷的出厂试验技术手段

对GIL出厂试验和设备运维具有一定的参考价值。

Abstract

Ultrasound partial discharge detection is an important method for diagnosing the insulation condition of GIL on site.In this paper

the partial discharge test for GIL in PE converter station was carried out by using ultrasonic detection method. Eleven abnormal signals were found in the test. In order to find out the causes of abnormal partial discharge signal

some researches have been done

such as check mechanical vibration signals and external corona

analyze the signal characteristics on site

carry out the test verification

locate the air gap

and simulate the defects.The results show that as the interface air gap exists in GIL

the characteristics of ultrasonic partial discharge signal are:the correlation signals of 50 Hz and 100 Hz.The correlation signals at 50 Hz are weak while the correlation signals at 100 Hz are strong. Besides

the sinusoidal correlation waveform appears in phase mode and there are two clusters of concentrated signal points within one period. According to the result of the field tests and the return-to-factory tests

the diagnostic method of partial discharge test for the GIL on site and the technical measures of routine test for eliminating defects were put forward in this paper as well.The researches in this paper are valuable for the routine test

equipment operation and maintenance of GIL.

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