Location of Multiple PD Sources on Distribution Lines by Measuring Emitted Pulse-Train Electromagnetic Waves (特集:電線・ケーブル分野の新技術)
Location of Multiple PD Sources on Distribution Lines by Measuring Emitted Pulse-Train Electromagnetic Waves (特集:電線・ケーブル分野の新技術)
复制标题
通过测量发射的脉冲串电磁波来定位配电线路上的多个局放源（专题：电线电缆领域的新技术）
DOI：
10.1541/ieejpes1990.120.11_1431
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
K. Matsuura
中科院分区：
文献类型：
--
作者：
A. Tungkanawanich;Z. Kawasaki;K. Matsuura
本文介绍了一种新的局部放电多源定位系统。该系统采用顺序触发的方法，可以在一次测量中检测到多个脉冲或脉冲串电磁波。我们利用四个VHF宽带天线作为电磁传感器，并计算它们之间的到达时间延迟，以定位PD源的3-D。利用这种技术，我们可以基于以下假设来定位多个源：在所检测的2 μs的时间窗口中仅包含一个电磁脉冲，或者每个时间窗口指示来自一个源的信号。利用平滑相干变换对时延估计进行了改进，并与标准互相关法进行了比较。该系统还提高了可靠性的方法，因为许多脉冲进行分析。进行了现场实验，以评估所提出的系统。
This paper presents a new system designed for locating multiple sources of partial discharge. The system employs a sequential triggering method which can detect many pulses or pulse-train electromagnetic waves emitted from partial discharge in one measurement. We utilize four VHF wideband antennas as electromagnetic sensors and calculate the time delay of arrival between them in order to locate PD sources in 3-D. With this technique, we can locate multiple sources based on the assumption that there is only one electromagnetic pulse contained in the detected time window of 2 μs or each time window indicates a signal from one source. The smoothed coherence transform is applied to improve the time delay estimation and compared with the standard cross correlation. The proposed system also enhances the reliability of the method because many pulses are analyzed. A field experiment was performed to evaluate the proposed system.