脉冲电声法空间电荷测量中波形变化校正的基础研究

Xiaoxin Li, Tomohiro Kawashima, Yoshinobu Murakami, Naohiro Hozumi
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引用次数: 0

摘要

脉冲电声方法通过施加脉冲电压和检测声响应来确定绝缘系统中空间电荷的分布。它从时域信号中估计电荷的位置和大小。为了进行定量分析,在没有空间电荷的样品上施加偏置电压,并且仅将电极产生的声信号用作校准的参考波形。然而,一个全面的,超高压绝缘系统往往已经包含空间电荷。因此,研究了在这种条件下获取参考信号的方法。我们研究了比较电压变化和响应信号变化的方法。提出了一种测量不同电压下信号差值的方法。此外,我们提出了一种相关电压和信号变化的方法,可以允许更快速的信号采集。用11 mm厚的模拟聚乙烯试样验证了该方法的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Basic Study on Calibration using Waveform Variation in Space Charge Measurement by Pulsed Electroacoustic Method
The pulsed electroacoustic method determines the distribution of space charge in an insulation system by applying a pulse voltage and detecting the acoustic response. It estimates the location and magnitude of charges from time-domain signals. For quantitative analysis, a bias voltage is applied to a specimen with no space charge, and the acoustic signal generated from the electrodes only is used as a reference waveform for calibration. However, a full-scale, extra-high voltage insulation system often already contains space charges in it. Therefore, a method of acquiring a reference signal under such a condition was studied. We studied methods to compare voltage variations and response signal variations. We proposed a method that measures the signal difference at different voltages. In addition, we proposed a method of correlating voltage and signal variations that may allow for more rapid signal acquisition. The feasibility was proved using an 11 mm-thick mimic polyethylene specimen.
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