Tree Propagation and Partial Discharge Phenomena of Nanocomposite Epoxy

T. Nakamura, T. Yoshimitsu, T. Yokoi, A. Kumada, K. Hidaka, H. Hirai, T. Imai
{"title":"Tree Propagation and Partial Discharge Phenomena of Nanocomposite Epoxy","authors":"T. Nakamura, T. Yoshimitsu, T. Yokoi, A. Kumada, K. Hidaka, H. Hirai, T. Imai","doi":"10.1109/CEIDP.2018.8544829","DOIUrl":null,"url":null,"abstract":"Tree propagation and partial discharge phenomena in nano-filled epoxy under the application of 50-Hz sinusoidal wave are studied. Silica particles whose diameters are 12 nm are filled in epoxy samples by 5 wt% and 10 wt%. Trees in a pure sample and a 5-wt% sample propagate and approach close to the grounded electrode. On the other hand, a tree in a 10-wt% sample stopped without approaching close to the ground. Luminescence of a partial discharge is also investigated. In a pure sample and a 5-wt% sample, luminescence of partial discharges is observed at the only tree tip. On the other hand, luminescence of a partial discharge in a 10-wt%sample is observed from the needle tip to the tree tip. The result suggests that conductivity of trees in nanocomposite epoxy becomes lower than that in pure epoxy. The difference of conductivity is an important factor to suppress propagation of electrical trees. SEM observation of tree walls shows that nano particles are attached to the tree walls in a nanocomposite sample. With these results, we propose the suppression model of tree propagation in a nanocomposite sample. In a nanocomposite sample, nano particles on tree walls prevent trees from carbonization, in other words, becoming conductive. Therefore, energy of a partial discharge hardly concentrates only at the tree tip in a nanocomposite sample because partial discharges in trees occur from the needle tip to the tree tip.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CEIDP.2018.8544829","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10

Abstract

Tree propagation and partial discharge phenomena in nano-filled epoxy under the application of 50-Hz sinusoidal wave are studied. Silica particles whose diameters are 12 nm are filled in epoxy samples by 5 wt% and 10 wt%. Trees in a pure sample and a 5-wt% sample propagate and approach close to the grounded electrode. On the other hand, a tree in a 10-wt% sample stopped without approaching close to the ground. Luminescence of a partial discharge is also investigated. In a pure sample and a 5-wt% sample, luminescence of partial discharges is observed at the only tree tip. On the other hand, luminescence of a partial discharge in a 10-wt%sample is observed from the needle tip to the tree tip. The result suggests that conductivity of trees in nanocomposite epoxy becomes lower than that in pure epoxy. The difference of conductivity is an important factor to suppress propagation of electrical trees. SEM observation of tree walls shows that nano particles are attached to the tree walls in a nanocomposite sample. With these results, we propose the suppression model of tree propagation in a nanocomposite sample. In a nanocomposite sample, nano particles on tree walls prevent trees from carbonization, in other words, becoming conductive. Therefore, energy of a partial discharge hardly concentrates only at the tree tip in a nanocomposite sample because partial discharges in trees occur from the needle tip to the tree tip.
纳米复合环氧树脂的树形繁殖及局部放电现象
研究了50 hz正弦波作用下纳米环氧树脂中的树形繁殖和局部放电现象。在环氧树脂样品中填充直径为12nm的二氧化硅颗粒,填充量分别为5wt %和10wt %。树在纯样品和5 wt%样品中繁殖并接近接地电极。另一方面,10 wt%样本中的树在没有接近地面的情况下停止。局部放电的发光也进行了研究。在纯样品和5 wt%样品中,在唯一的树尖处观察到部分放电的发光。另一方面,在10 wt%的样品中,从针尖到树尖观察到部分放电的发光。结果表明,纳米复合环氧树脂中的树的电导率比纯环氧树脂中的树的电导率低。电导率差异是制约电树繁殖的重要因素。对树壁的扫描电镜观察表明,纳米颗粒附着在纳米复合材料样品的树壁上。基于这些结果,我们提出了树在纳米复合材料样品中的繁殖抑制模型。在纳米复合材料样品中,树壁上的纳米颗粒可以防止树木碳化,换句话说,可以防止树木导电。因此,在纳米复合材料样品中,部分放电的能量几乎不集中在树的顶端,因为树的部分放电是从针尖到树尖发生的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信