Leakage current analysis and electric field calculation in salt fog ageing test on polymer insulation material

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI:10.1109/CEIDP.2003.1254802

Y. Zhu, S. Yamashita, N. Anami, M. Otsubo, C. Honda, S. Hashimoto, Y. Hashimot

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引用次数: 8

Abstract

This paper describes the results of experiments made to examine the electrical insulating characteristics of polymer materials in a salt fog ageing test. In this study, the factors that affect the insulation deterioration from water droplets were analyzed by means of electric field calculation and some experiments. It is demonstrated that water droplets on the polymer surface locally enhance the electric field and may cause partial discharge. From the results of ageing test, when polymer loses its hydrophobicity with ageing time, water drops will elongate, coalesce, and extend with ellipsoidal shape in the direction of electric field, which results in peak value and higher harmonic component in the change curve of the maximum horizontal E-Field at the triple junction increasing remarkably. Simultaneously, increase tendency of the third harmonic wave component with time elapsing can be observed in leakage current waveform, which is in agreement with the results of electric field calculation.

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聚合物绝缘材料盐雾老化试验泄漏电流分析及电场计算

本文介绍了在盐雾老化试验中检测高分子材料电绝缘特性的实验结果。本文通过电场计算和实验，分析了水滴导致绝缘劣化的影响因素。结果表明，聚合物表面的水滴局部增强了电场，并可能引起局部放电。从老化试验结果来看，随着老化时间的延长，聚合物失去疏水性后，水滴在电场方向呈椭圆形拉长、聚并、延伸，导致三结处最大水平电场变化曲线的峰值和高次谐波分量显著增加。同时，泄漏电流波形中三次谐波分量随时间的推移呈增加趋势，这与电场计算结果一致。

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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2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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