Propagation Characteristics of UHF Partial Discharge Signals in GIS

CHENG Xu; YAN Tingli; ZHAN Huamao; WANG Liang; LIU Bo; ZHAO Chengnan; ZHENG Shusheng

doi:10.13296/j.1001-1609.hva.2014.05.007

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Propagation Characteristics of UHF Partial Discharge Signals in GIS

更新时间：2025-04-26

- Propagation Characteristics of UHF Partial Discharge Signals in GIS
- High VoltageApparatus Vol. 50, Issue 5, Pages: 30-35(2014)
- 作者机构：
  
  1. 北京电力科学研究院
  2. 莱芜供电公司
  3. 华北电力大学高电压与电磁兼容北京市重点实验室
  4. 华北电力大学新能源电力系统国家重点实验室
  5. 国家电网公司交流建设分公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2014.05.007
  CLC： TM564
- Published：2014
- 稿件说明：
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[1]程序,颜廷利,詹花茂,王亮,刘波,赵承楠,郑书生.GIS中局部放电UHF信号传播特性研究[J].高压电器,2014,50(05):30-35.

CHENG Xu, YAN Tingli, ZHAN Huamao, et al. Propagation Characteristics of UHF Partial Discharge Signals in GIS[J]. High voltageapparatus, 2014, 50(5): 30-35.
[1]程序,颜廷利,詹花茂,王亮,刘波,赵承楠,郑书生.GIS中局部放电UHF信号传播特性研究[J].高压电器,2014,50(05):30-35. DOI： 10.13296/j.1001-1609.hva.2014.05.007.

CHENG Xu, YAN Tingli, ZHAN Huamao, et al. Propagation Characteristics of UHF Partial Discharge Signals in GIS[J]. High voltageapparatus, 2014, 50(5): 30-35. DOI： 10.13296/j.1001-1609.hva.2014.05.007.

摘要

在绝缘子金属法兰浇注孔处放置传感器可以用来接收GIS中辐射出来的电磁波

这是测量局部放电（以下简称局放）信号的一种方法。为研究局放UHF信号在通过绝缘子金属法兰浇注孔时的传播特性

笔者采用时域有限差分法进行了建模分析

研究了UHF信号在通过不同尺寸的金属法兰浇注孔时的场强峰峰值和频谱变化特性;试验研究了高压导体尖刺故障下的UHF信号传播特性

验证了仿真分析的有效性。研究结果表明

沿导杆方向的场强分量远大于另外两个方向的;当绝缘子法兰浇注孔尺寸增大时

从该孔中能辐射出能量更强的信号

而且信号中较低频率（500

00 MHz）的分量占较大比例。

Abstract

A sensor positioned at the sprue in metal flange of an insulator can receive UHF signals radiated from GIS for analyzing the characteristics of partial discharge. To understand the effects of the sprue size on the propagation of UHF electromagnetic waves

the finite difference time domain（FDTD）method is used for modeling. The characteristics of the time domain and frequency domain parameters of the UHF waves in the middle of the sprues with different sizes are investigated. Moreover

some experiments are conducted to verify the effectiveness of the simulation. The results show that the field strength component along the conductor is much stronger than the components of other two directions

and that the larger the sprue size

the stronger the signals radiating from the sprue

in which low frequency components（500-900 MHz）occupy a large proportion.

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