Detection of wide-band E-M signals emitted from partial discharge occurring in GIS using wavelet transform
Detection of wide-band E-M signals emitted from partial discharge occurring in GIS using wavelet transform
复制标题
使用小波变换检测 GIS 中局部放电发出的宽带电磁信号
DOI：
10.1109/61.852970
复制
发表时间：
2000
影响因子：
4.4
通讯作者：
K. Matsuura
中科院分区：
文献类型：
--
作者：
M. Kawada;A. Tungkanawanich;Z. Kawasaki;K. Matsuura
最近，已经研究了诊断技术以检测与高压电气设备中的介电材料缺陷相关联的局部放电（PD）。气体绝缘开关设备（GIS）是变电站中的重要设备，测量GIS中发生的局部放电（PD）是绝缘击穿的征兆，因此非常有必要。针对绝缘故障非接触检测的重要性，提出了一种基于小波变换的局部放电宽带电磁波检测方法。小波变换在时频域中提供了频谱内容的直接定量测量，即“动态频谱”。本文从实验上给出了局部放电发射的宽频带电磁波的时频“动态谱”。该方法可用于GIS绝缘击穿征兆的检测。
Recently, diagnostic techniques have been investigated to detect a partial discharge (PD) associated with a dielectric material defect in a high-voltage electrical apparatus. Gas insulated switchgear (GIS) is an important equipment in a substation, it is highly desirable to measure a partial discharge (PD) occurring in GIS which is a symptom of an insulation breakdown. As it is important to develop a noncontact method for detecting the insulation fault, this paper proposes a new method to detect the wide-band electromagnetic (E-M) wave emitted from PD using the Wavelet transform. The Wavelet transform provides a direct quantitative measure of spectral content, "dynamic spectrum", in the time-frequency domain. This paper experimentally shows the "dynamic spectrum" of the wide-band E-M wave emitted from PD in the time-frequency domain. This method is shown to be useful for detecting the symptom of the insulation breakdown occurring in GIS.