纳米MgO/环氧树脂复合材料的陷阱特性及对电树枝特性的影响研究

doi:10.19595/j.cnki.1000-6753.tces.211131

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Abstract With the continuous improvement of voltage level, the failure of insulation materials caused by the aging of electrical tree is becoming more and more serious. In order to study the effect of nano-MgO on the aging of epoxy resin electrical tree, nano-MgO/epoxy resin composites with different mass fractions (0~1%) were prepared, and the initiation and growth process of electrical tree were observed. The results show that the electrical tree resistance of nano-MgO/epoxy resin composites increases with the increase of filling ratio under slight filling. When the mass fraction of nano-MgO is 1%, the tree initiation probability of nano-MgO/epoxy resin composites is reduced by 45%, the electrical tree length is reduced to about 1/3 of that of pure epoxy resin, and the corresponding AC breakdown field strength is increased by 14.1%. According to the analysis of the dielectric properties and trap properties, with the increase of filling ratio, the dielectric constant of the composite decreases and the trap energy level deepens. With the addition of nano-MgO, the trap energy level of the composite was increased, and the carrier mobility and concentration were decreased, which improved the electrical tree resistance of nano-MgO/epoxy resin composite.

Key words： Epoxy resin nano-MgO electrical tree dielectric property trap

Received: 20 July 2021

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TM215

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	Articles by authors
	Cheng Zixia
	Xing Weiwei
	Zhang Yunxiao
	Zhou Yuanxiang
	Teng Chenyuan

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Cheng Zixia,Xing Weiwei,Zhang Yunxiao等. Study on Trap Properties of Nano-MgO/Epoxy Resin Composites and Its Influence on Electrical Tree Properties[J]. Transactions of China Electrotechnical Society, 2022, 37(21): 5562-5569.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.211131 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I21/5562

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