Growth Characteristics of Electrical Trees in Epoxy Resin-based Nano-SiO2 Composites with Different Filler Concentrations

被引：0
|
作者：
Yan S. [1 ]
Li Y. [1 ]
Tian M. [1 ]
Ren H. [1 ]
Lei Z. [1 ]
机构：
[1] College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Electric tree branch; Epoxy resin; Growth characteristics; Nano-silica; Structure;
D O I：
10.13336/j.1003-6520.hve.20191125011
中图分类号：
学科分类号：
摘要：
In order to study the initiation, growth characteristics, and structural characteristics of electric tree branches in the epoxy resin composites with different nano-filler concentration, the electric tree branches at the power frequency of 20 kV were cultivated to carry out experiments by using the localized buck transformer and the real-time microscopic observation device. The mass fractions of nanosized silica in nano-materials were 0.5%, 1% and 2.5%, respectively. It is found that the initiation time of the electric tree branches is significantly prolonged at the mass fraction of 0.5%, and the growth rate of the electric tree branches decreases significantly. When the mass fraction is 1%, the growth resistance of epoxy resin is the best, and the structures of the electric tree branches are in a more complex plexus-branch type; compared with the pure epoxy resin, the main color of the electric tree branches should be shallow, the development mechanism is also quite different; When the mass fraction is 2.5%, the growth rate of electric tree branches is faster than that when the mass fraction is 1%, and the shape is complex stick-plexiform. Finally, the mechanism of the growth of nanoparticles was analyzed by analyzing the interface between the nanoparticles and the epoxy resin matrix. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：3860 / 3868
页数：8
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