Comparison of Electrical Tree Characteristics Between Itaconic Acid Based Epoxy Resin and Bisphenol A Epoxy Resin

被引：0
|
作者：
Liu H. [1 ,2 ]
Guo Z. [1 ]
Liu Y. [1 ,2 ]
Zhou S. [3 ]
Wu X. [1 ]
机构：
[1] Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding
[2] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing
[3] China Electric Power Research Institute, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2022年 / 48卷 / 07期
基金：
中国国家自然科学基金;
关键词：
bisphenol A epoxy resin; electric tree; itaconic acid based epoxy resin; microstructural; molecular dynamics;
D O I：
10.13336/j.1003-6520.hve.20220460
中图分类号：
学科分类号：
摘要：
Itaconic-acid-based epoxy resin (EIA) is an environmentally friendly epoxy resin prepared from itaconic acid, a renewable resource. The characteristics of electric tree initiation and growth in itaconic-acid-based epoxy resin were explored and compared with conventional E−51 epoxy resin (EP) to evaluate its feasibility as an internal insulating material. The initiation voltage of electric tree branches in the two resins under power frequency voltage was tested, and the growths of electric tree branches under 12 kV and 14 kV were observed. Molecular dynamics simulation (MD) was used to establish the cross-linked structure model of EIA and EP,and its microstructural parameters were calculated to analyze the influence mechanism of the cross-linked structure on the characteristics of electrical resistance dendrites. The test and MD simulation results show that the EP resin has a massive phenyl chain structure, which limits the rotation or movement of the polymer main chain, and the free volume is small, resulting in a higher electric tree initiation voltage; however, its electric tree branches are mainly branch-like electrical branches, and the subsequent growth is relatively rapid. Relatively speaking, the EIA resin molecular cross-linking model is a flexible long-chain structure, with a relatively large free volume, and its electric tree initiation voltage is low and it grows faster in a short period of time after initiation. However, its electrical branches are mainly clump-like electrical branches, and the subsequent growth is slow. © 2022 Science Press. All rights reserved.
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页码：2607 / 2615
页数：8
相关论文
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