Study on Trap Properties of Nano-MgO/Epoxy Resin Composites and Its Influence on Electrical Tree Properties
Cheng Zixia1, Xing Weiwei1, Zhang Yunxiao2, Zhou Yuanxiang2,3, Teng Chenyuan2
1. School of Electrical Engineering Zhengzhou University Zhengzhou 450001 China; 2. State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing 100084 China; 3. The Wind Solar Storage Division of State Key Laboratory of Power System and Generation Equipment School of Electrical Engineering Xinjiang University Urumqi 830047 china
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.
程子霞, 邢威威, 张云霄, 周远翔, 滕陈源. 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[J]. 电工技术学报, 2022, 37(21): 5562-5569.
Cheng Zixia, Xing Weiwei, Zhang Yunxiao, Zhou Yuanxiang, Teng Chenyuan. Study on Trap Properties of Nano-MgO/Epoxy Resin Composites and Its Influence on Electrical Tree Properties. Transactions of China Electrotechnical Society, 2022, 37(21): 5562-5569.
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2022, Vol. 37 
