文档介绍：52
陈 鑫等：针-板电极结构下三元混合绝缘油纸复合体系沿面放电特性研究 绝缘材料 2022,55(1)
针-板of density functional theory, the energy band
structures of natural ester molecule and mineral oil molecule were studied comparatively. The results show that
compared with the mineral insulating oil-paper composite system, the three-element mixed insulating oil-paper
composite system has smaller partial discharge inception voltage, flashover voltage and larger maximum discharge
magnitude, discharge pulse number under creeping discharge fault. There is small difference on electric field
distribution between two insulating oil-paper composite systems under needle-plate electrode structure. The energy
gap of palm oil molecule and soybean oil molecule in mixed oil are smaller than that of the mineral oil molecule,
收稿日期：2021-02-27 修回日期：2021-11-18
基金项目：国家自然科学基金面上项目（52077015）
作者简介：陈鑫（1994-），男（汉族），陕西咸阳人，硕士生，研究方向为新型绝缘材料；通信作者：郝建（1984-），男（汉族），河北衡水人，副教授，
研究方向为输变电设备运行状态监测及故障诊断、新型绝缘材料的研发及其性能表征。53
绝缘材料 2022,55(1) 陈 鑫等：针-板电极结构下三元混合绝缘油纸复合体系沿面放电特性研究
therefore, the mixed oil molecule is more likely to ionize under strong electric field.
Key words: mixed oil; creeping discharge; needle-plate electrode; energy band structure
0 引 言 针对矿物绝缘油的替代油品，国内外学者在植物绝