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首页> 外文会议>2013 IEEE 1st International Conference on Condition Assessment Techniques in Electrical Systems >Frequency dependent propagation characteristics of partial discharge acoustic emission signal
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Frequency dependent propagation characteristics of partial discharge acoustic emission signal

机译：局部放电声发射信号的频率相关传播特性

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摘要

Oil pressboard insulation used in transformer deteriorates due to partial discharge (PD) leading to premature failure. Online monitoring of PDs can reduce the risk of catastrophic failure of transformers. Being non invasive and non interference prone, acoustic technique based PD on-line monitoring is advantageous. Acoustic emission (AE) signal produced by PD are detected by sensors mounted on the tank surface. AE signal attenuates while propagating from source to sensors. This attenuation is frequency dependent. Higher frequency component attenuates more than lower frequency components. PDs are classified according to frequency components of PDAE signal. This paper presents experimental results and analysis for frequency dependent propagation characterization of PDAE signal of laboratory simulated PDs in oil pressboard insulation system using point plane electrode system. The measured PDAE signals are analyzed using Discrete Wavelet Transform (DWT). The results highlight the possible use of frequency dependent propagation characteristics of PDAE signal for source location and for avoidance of misclassification.
机译：由于局部放电（PD）导致过早故障，变压器中使用的油压板绝缘层会劣化。 PD的在线监视可以降低变压器灾难性故障的风险。由于无创且无干扰，基于声学技术的PD在线监测是有利的。 PD产生的声发射（AE）信号由安装在罐表面上的传感器检测。 AE信号在从信号源传播到传感器时会衰减。该衰减取决于频率。较高频率的分量比较低频率的分量衰减更大。根据PDAE信号的频率成分对PD进行分类。本文介绍了使用点平面电极系统在油压板绝缘系统中实验室模拟局部放电的PDAE信号随频率变化的传播特性的实验结果和分析。使用离散小波变换（DWT）分析测得的PDAE信号。结果强调了可能使用PDAE信号的频率相关传播特性进行源定位和避免错误分类。

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