Ageing Classification of Metal Oxide Surge Arrester Using Its Power Factor

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI:10.1109/ICPADM49635.2021.9493968

Abdullah Munir, Z. Abdul-Malek, Rai Naveed Arshad

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Abstract

The third harmonic component of resistive leakage current is considered as the most sensitive ageing indicator of metal oxide surge arrester (MOSA). It is essential to extract the resistive component of the total leakage current prior to determining its third harmonic content. Several methods have been proposed so far to determine the resistive leakage current. But, the implementation of complex mathematical procedures has made these techniques difficult and less accurate. Therefore, this paper is aimed to propose the power factor as a new ageing indicator of MOSA. New indicator is determined without extracting the resistive component of the total leakage current. This study has been performed experimentally on three aged samples of 120 kV rated MOSAs to determine their power factors. The results have shown that the variation in proposed indicator towards arrester’s ageing is similar to that of the resistive third harmonic component. The percentage rise in the power factors of MOSA-I, II, and III by increasing the voltage from 70kV to 120kV to simulate ageing, are found to be 105%, 118%, and 108% respectively.

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基于功率因数的金属氧化物避雷器老化分类

电阻泄漏电流的三次谐波分量被认为是金属氧化物避雷器(MOSA)最敏感的老化指标。在确定总泄漏电流的三次谐波含量之前，必须先提取其电阻分量。目前已经提出了几种确定漏阻电流的方法。但是，复杂的数学过程的实现使得这些技术变得困难和不那么精确。因此，本文旨在提出功率因数作为MOSA的一种新的老化指标。在不提取总泄漏电流的电阻分量的情况下确定新的指标。本文对3个老化的120 kV额定MOSAs样品进行了实验研究，以确定其功率因数。结果表明，所提出的避雷器老化指标的变化与电阻性三次谐波分量的变化相似。模拟老化时，将电压从70kV增加到120kV, MOSA-I、II和III的功率因数分别上升105%、118%和108%。

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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2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)

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