绝缘材料表面电荷测量优化及等离子体处理对其表面电特性的影响

发布时间：2018-07-11 18:11

本文选题：表面电位测量 + 环氧树脂　；参考：《高电压技术》2017年06期

【摘要】：绝缘材料表面电荷衰减特性在一定程度上反映了介质材料表面电学性能的好坏,其变化会影响材料的极化、抗静电性能以及闪络性能。如何对绝缘子表面电荷分布进行准确的测量具有重要意义。基于自主搭建的表面电位测试系统,在针板电极下,研究了不同测量条件(电压幅值、充电时间、有无栅极网、相对湿度)对环氧树脂材料表面电位测量的影响,并提出最佳测量条件。优化介质阻挡放电等离子体(DBD)放电参数,并处理环氧树脂表面,利用搭建的表面电位测试系统研究了等离子体处理对环氧树脂表面电位衰减速率的影响规律。结果表明介质表面最大电位幅值随施压幅值的增加而增加,但增加一定程度后达到饱和状态;施压时间对表面电位影响不大;湿度的增大会加快表面电位的衰减;栅极的存在会对表面电位有"钳制"作用。经DBD处理后环氧树脂表面电位衰减明显加快,且衰减速率随处理时间的增加呈先增加后减小的变化趋势,最佳处理时间为180 s。该研究为表面电荷测量提供了有利的参考,并提供了一种有效加速表面电荷衰减的改性方式。
[Abstract]:The surface charge attenuation characteristics of insulating materials to a certain extent reflect the surface electrical properties of dielectric materials, which will affect the polarization, antistatic and flashover properties of the materials. How to accurately measure the surface charge distribution of insulators is of great significance. Based on the self-built surface potential measurement system, the effects of different measuring conditions (voltage amplitude, charging time, grid network, relative humidity) on surface potential measurement of epoxy resin were studied under needle plate electrode. The optimum measuring conditions are also proposed. The discharge parameters of dielectric barrier discharge plasma (DBD) were optimized and the surface of epoxy resin was treated. The effect of plasma treatment on the decay rate of surface potential of epoxy resin was studied by using the surface potential measurement system. The results show that the maximum potential amplitude of the dielectric surface increases with the increase of the pressure amplitude, but reaches saturation state after increasing to a certain extent, the pressure time has little effect on the surface potential, and the increase of humidity will accelerate the attenuation of the surface potential. The existence of the grid will have a "clamp" effect on the surface potential. After DBD treatment, the surface potential decay of epoxy resin was accelerated obviously, and the decay rate increased first and then decreased with the increase of treatment time. The best treatment time was 180 s. This study provides a useful reference for surface charge measurement and an effective modification method to accelerate surface charge decay.
【作者单位】：中国科学院电工研究所;郑州大学电气工程学院;中国科学院大学;
【基金】：国家自然科学基金(11575194) 国家重点基础研究发展计划(973 计划) (2014CB239505-3)~~
【分类号】：TM21

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