高压聚合物绝缘子表面电场分布及其在使用条件下的变化

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI:10.1109/ELINSL.2006.1665256

Ailton L. Souza, Ivan J. S. Lopes

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引用次数: 10

摘要

本文采用计算模拟和室内实验相结合的方法，研究了高压聚合物绝缘子表面电场分布及水滴对电场的增强作用。通过有限元模拟分析了影响电场分布的各种因素。其中，对分级环和绝缘子表面水滴的存在进行了研究。模拟了干燥条件下绝缘子表面的变化，以及潮湿条件下绝缘子表面的变化。此外，在138 kV聚合物绝缘体上进行了无线电影响电压(RIV)测量。提出了壳体上存在湿度的模型，并讨论了湿度对电场分布的影响。结果表明，电场沿表面的增强是相当大的，达到了导致材料电晕和早期老化的值

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Electric field distribution along the surface of high voltage polymer insulators and its changes under service conditions

This paper investigates the electric field distribution along the surface of high voltage polymer insulators and its enhancement due to water droplets by means of computational simulations and laboratory experiments. Different factors affecting the electric field distribution are analyzed through finite element method simulations. Among them, the presence of a grading ring and water droplets on the insulator surface are studied. The insulator surface is simulated for dry conditions, as well as its changes under wet conditions. Additionally, radio-influence voltage (RIV) measurements are performed on a 138 kV polymer insulator. A model for the presence of humidity on the housing is presented and its effect on the field distribution is discussed. The results show that the electric field enhancement along the surface is considerable and reaches values that cause corona and early ageing of the material

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Conference Record of the 2006 IEEE International Symposium on Electrical Insulation

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