Ageing Detection of Metal Oxide Surge Arrester using Fifth Harmonic Resistive Current

2020 IEEE International Conference on Power and Energy (PECon) Pub Date : 2020-12-07 DOI:10.1109/PECon48942.2020.9314609

Abdullah Munir, Z. Abdul-Malek

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引用次数: 2

Abstract

Leakage current based condition monitoring plays a vital role to predict the malfunctioning of Metal Oxide Surge Arrester (MOSA) due to its ageing and degradation. The change in the resistive leakage current and particularly its third harmonic component is considered as an excellent indication of arrester’s ageing. The presence of third harmonic in the grid’s voltage affects the extraction of third harmonic resistive current. Therefore, it can lead to incorrect condition assessment of MOSA. This paper aims to introduce a new ageing indicator for MOSA, which is independent of voltage harmonics. This analysis is performed experimentally on three aged samples of 120kV rated polymeric MOSAs manufactured by ABB. Fast fourier transform (FFT) is applied to the acquired resistive leakage current to extract its harmonic parameters. It is found that the fifth harmonic resistive current exhibits similar sensitivity towards ageing as compared to the third harmonic resistive current. Results have shown that the condition assessment based on third harmonic current can easily be replaced with the fifth harmonic current.

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利用五次谐波电阻电流检测金属氧化物避雷器的老化

基于泄漏电流的状态监测对于预测金属氧化物避雷器(MOSA)因老化和退化而产生的故障具有重要意义。阻性泄漏电流的变化，特别是其三次谐波分量的变化被认为是避雷器老化的一个很好的指示。电网电压中三次谐波的存在影响了三次谐波电阻电流的提取。因此，这可能导致对MOSA的状态评估不正确。本文旨在介绍一种新的与电压谐波无关的MOSA老化指示器。对ABB公司生产的3个120kV额定聚合MOSAs老化样品进行了实验分析，利用快速傅里叶变换(Fast fourier transform, FFT)对获得的电阻性漏电流进行了谐波参数提取。结果表明，与三次谐波电阻电流相比，五次谐波电阻电流对老化具有相似的敏感性。结果表明，基于三次谐波电流的状态评估可以很容易地用五次谐波电流代替。

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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2020 IEEE International Conference on Power and Energy (PECon)

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