Analysis of VHF-wideband Impulsive Electromagnetic Noises from Power Distribution Lines
Analysis of VHF-wideband Impulsive Electromagnetic Noises from Power Distribution Lines
复制标题
配电线路中的 VHF 宽带脉冲电磁噪声分析
DOI：
10.1541/ieejpes1990.121.11_1538
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发表时间：
2001
影响因子：
--
通讯作者：
Z. Kawasaki
中科院分区：
文献类型：
--
作者：
A. Tungkanawanich;Z. Kawasaki
由配电线路上的放电产生的脉冲电磁噪声是对通信系统的宽带干扰的主要原因。本文分析了各种放电源产生的脉冲噪声。我们采用了一种非接触测量系统，使用VHF宽带天线，它不仅允许电磁脉冲的波形，但脉冲的定时。通过使用该系统，我们测量了通过施加高电压在放电源上产生的脉冲。利用傅立叶变换和小波变换等数字信号处理技术，分析了单脉冲波形的特征。此外，时间序列脉冲的脉冲高度模式进行了研究。结合放电机理讨论了正负脉冲的脉冲高度和脉冲重复率。研究结果对配电系统中放电源的分类和绝缘子的状态评估具有一定的参考价值。
Impulsive electromagnetic noises, generated by electrical discharges on power distribution lines, are mainly responsible for wide-band disturbances to communication systems. In this paper, the impulsive noises emit ted from various discharge sources are analyzed. We employed a non-contact measurement system using the VHF wide-band antenna, which permits not only the waveforms of electromagnetic pulses but also the timing of pulses. By using this system, we measured the pulses generated by applying high voltage upon the discharge sources. The characteristics of a single pulse waveform are analyzed by digital signal processing techniques, which are Fourier and wavelet transforms. Moreover, the time-sequential pulse-height patterns of pulses are investigated. The pulse-height and pulse-repetition of both positive and negative pulses are discussed associating with the mechanism of discharge. It is shown that the results are useful to classify the kinds of discharge sources and assess the condition of insulators in distribution systems.