电工技术学报2017，Vol.32Issue(16)：245-255,11.DOI:10.19595/j.cnki.1000-6753.tces.160048
环氧树脂真空沿面闪络后表面形貌的AFM分析及分形特征提取
AFM Analysis and Fractal Characteristics Extraction of the Surface Morphology of Epoxy Resin After Vacuum Flashover
摘要
Abstract
A systematic and accurate description to the surface morphology of insulating materials helps to obtain a better understand of the damage effects of discharge on the material surface. It is essential to explore the relationship between the surface morphology and flashover characteristics. In this paper, vacuum flashover experiments were conducted on epoxy resin under different electric fields. Then, the surface morphology of the samples under different damage degrees and discharge regions was investigated by atomic force microscopy (AFM), and fractal theory was utilized to quantitatively analyze the morphological features. The results show that the sample surfaces sequentially experience the shape of sting, granule, peak, and continuous mountain during the four stages of damage process, and the surface roughness increases constantly in the process. In addition, the impact of flashover driven by highly non-uniform field on the surface morphology is more significant. Furthermore, the surface morphology of samples has fractal characteristics. The fractal dimension and multifractal parameters can be used to quantitatively characterize the complexity of the surface morphology as well as the height distribution of the surface. It is also found that the surface insulating strength decreases after flashover treatment, and the insulating performance is related to the surface roughness as well as the fractal parameters of the dielectric surface.关键词
环氧树脂/表面形貌/原子力显微镜/沿面闪络/分形Key words
Epoxy resin/surface morphology/atomic force microscopy (AFM)/surface flashover/fractal分类
信息技术与安全科学引用本文复制引用
谢庆,付可欣,陆路,梁少栋,黄河,律方成..环氧树脂真空沿面闪络后表面形貌的AFM分析及分形特征提取[J].电工技术学报,2017,32(16):245-255,11.基金项目
国家自然科学基金青年基金(51507066)、河北省自然科学基金(E2015502081)、中央高校基本科研业务费专项资金(2016ZZD07)和新能源电力系统国家重点实验室开放课题(LAPS16009)资助项目. （51507066）
