基于局部放电特征研究蒙脱土/聚乙烯纳米复合材料的电树枝性能

doi:10.19595/j.cnki.1000-6753.tces.181147

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摘要利用超声波空化作用对有机化纳米蒙脱土进行剥离处理,采用熔融插层法与低密度聚乙烯（LDPE）混合,分别制备了有机化蒙脱土/聚乙烯（O-MMT/LDPE）及超声处理蒙脱土/聚乙烯（US-O-MMT/LDPE）纳米复合材料。对比研究了超声处理前后O-MMT/LDPE纳米复合材料电树枝生长过程中的树枝形态变化、生长特性及局部放电特性,并分析了不同老化阶段及不同形态下电树枝局部放电信号频谱特征。研究结果表明,对有机化蒙脱土超声处理显著提高了O-MMT/LDPE纳米复合材料的耐电树枝性能,并且有效抑制了电树枝生长过程中的局部放电。电树枝生长过程的局部放电频域特征随着电树枝形态而发生变化,电树枝越稠密,高频放电信号越多,频谱分布越宽。

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	张晓虹
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关键词 ：聚乙烯, 蒙脱土, 纳米复合材料, 电树枝性能, 局部放电

Abstract：Ultrasonic organic montmorillonite/low-density polyethylene (US-O-MMT/LDPE) nanocomposite was prepared by melt intercalation method after the organic nano-montmorillonite (O-MMT) was treated by ultrasonic cavitation technology. The morphological change, growth characteristic and partial discharge characteristic of the electrical tree in the US-O-MMT/LDPE nanocomposite was investigated and compared with LDPE and O-MMT/LDPE nanocomposite. And the spectrum characteristics of partial discharge signal in different aging stages was analyzed. The results indicate that the ultrasonic treatment of organic montmorillonite significantly improves the electrical tree resistance property of the LDPE and O-MMT/LDPE nanocomposite and effectively inhibits the partial discharge during the growth of electric tree. The spectrum characteristics of the partial discharge in the electrical tree growth process changes with the morphological change of the electrical tree. The denser the electrical tree, the more high-frequency discharge signal, the wider the spectrum distribution.

Key words： Polyethylene montmorillonite nanocomposite electrical tree partial discharge

收稿日期: 2018-07-04 出版日期: 2019-12-11

PACS:

TM215

基金资助:国家自然科学基金（51577045）和特高压工程技术（昆明、广州）国家工程实验室开放基金（NEL201516）资助项目

通讯作者: 高俊国男,1980年生,副教授,研究方向为纳米复合材料绝缘性能。E-mail：gaojunguo@hrbust.edu.cn

作者简介: 张晓虹女,1958年生,教授,博士生导师,研究方向为纳米复合电介质的结构与性能。E-mail：x_hzhang2002@hrbust.edu.cn

引用本文:

张晓虹, 石泽祥, 张双, 高俊国, 王国利. 基于局部放电特征研究蒙脱土/聚乙烯纳米复合材料的电树枝性能[J]. 电工技术学报, 2019, 34(23): 5049-5057. Zhang Xiaohong, Shi Zexiang, Zhang Shuang, Gao Junguo, Wang Guoli. Investigation on Electrical Tree Resistance Property of Montmorillonite/Polyethylene Nanocomposites Based on Partial Discharge Characteristics. Transactions of China Electrotechnical Society, 2019, 34(23): 5049-5057.

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