高电压技术2012，Vol.38Issue(3)：691-696,6.
低介电常数绝缘纸的制备及其击穿性能
Preparation for Low-permittivity Insulation Paper and Its Breakdown Performance
摘要
Abstract
To improve the breakdown voltage of paper-oil-paper composite insulation system in oil-immersed transformer windings,we prepared the micro nano SiO2 hollow sphere which could reduce the relative permittivity of insulation paper and the handsheets containing different mass of SiO2 hollow sphere,and measured the relative permittivity of oil immersed insulation paper containing different mass SiO2 hollow sphere,showing that the insulation paper containing 5% SiO2 hollow sphere had the lowest relative permittivity,of which the permittivity value was lower than that of insulation paper without SiO2 hollow sphere by 34%.Moreover,we analyzed the effect of relative permittivity of insulation paper and the thickness of oil gap on the field strength distribution in the oil and paper,and designed a paper-oil-paper composite insulation system model which was calculated by COMSOL software.It was found that the electric field of oil and paper was uniform and dielectric layer equations could be used to analyze the paper-oil-paper model.Finally,we tested the electrical breakdown of paper-oil-paper insulation system with different mass of SiO2 hollow sphere.It was found the breakdown voltage of paper-oil-paper composite insulation system composed of lower relative permittivity was higher.And the highest breakdown voltage was higher than that of paper-oil-paper composite insulation system without SiO2 hollow sphere by 15.5%.关键词
复合绝缘系统/SiO2空心微球/COMSOL/击穿电压/相对介电常数/手抄片Key words
composite insulation system/SiO2 hollow sphere/COMSOL/breakdown voltage/relative permittivity/handsheet分类
信息技术与安全科学引用本文复制引用
张福州,廖瑞金,袁媛,李玉森,彭庆军,刘团..低介电常数绝缘纸的制备及其击穿性能[J].高电压技术,2012,38(3):691-696,6.基金项目
国家创新研究群体基金 （）
国家重点基础研究发展计划（973计划） （）
输配电装备及系统安全与新技术国家重点实验室自主研究项目 （）
