Frequency dependent propagation characteristics of partial discharge acoustic emission signal

2013 IEEE 1st International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2013-12-01 DOI:10.1109/CATCON.2013.6737503

P. Kundu, N. Kishore, A. Sinha

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引用次数: 2

Abstract

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.

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部分放电声发射信号的频率相关传播特性

变压器中使用的油压板绝缘由于局部放电而发生劣化，导致绝缘过早失效。对pd进行在线监测可以降低变压器发生灾难性故障的风险。基于声学技术的PD在线监测具有无创、无干扰等优点。PD产生的声发射(AE)信号由安装在罐体表面的传感器检测。声发射信号在从信号源传播到传感器的过程中衰减。这种衰减与频率有关。高频分量比低频分量衰减更大。根据PDAE信号的频率分量对pdp进行分类。本文利用点平面电极系统对实验室模拟油压板绝缘系统中PDAE信号的频率相关传播特性进行了实验研究和分析。利用离散小波变换(DWT)对实测PDAE信号进行分析。结果强调了PDAE信号的频率相关传播特性用于源定位和避免误分类的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2013 IEEE 1st International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)

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