Significantly enhanced flashover voltage of epoxy in vacuum by graded surface roughness modification
作者机构：State Key Laboratory of Power Transmission Equipment&System Security and New TechnologyChongqing UniversityChongqingChina College of Electrical Engineering and Control ScienceNanjing Tech UniversityNanjingChina State Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'anChina School of EngineeringRMIT UniversityMelbourneVictoriaAustralia
出 版 物：《High Voltage》 (高电压（英文）)
年 卷 期：2023年第8卷第5期
页 面：997-1010页
核心收录：
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：National Natural Science Foundation of China,Grant/Award Number:92166206 Fundamental Research Funds for the Central Universities,Grant/Award Number:2022CDJQY‐014 111 Project of the Ministry of Education of China,Grant/Award Number:BP0820005
摘 要：The flashover strength of epoxy(EP)insulations in the High voltage direct current applications of future energy grids can be improved by tailoring their surface *** work aims to improve the DC surface flashover characteristics of EP after being treated with sandpaper of different *** with virgin EP and homogenously modified EP considering varying surface roughness(R_(a)=0.54,3.16,5.24,and 8.35μm)are *** experimental characterisations,such as water contact angle,surface intrinsic conductivity,surface voltages,flashover strength,and trap distributions are conducted and evaluated to analyse the difference between virgin and treated ***,based on the obtained experimental results of homogenously treated EP and theoretical analysis,the concept of surface functionally graded materials(SFGMs)is put *** flashover voltages of homogenously treated EP are augmented significantly compared to virgin EP regardless of the voltage polarity and enhanced by enhancing the surface *** sample T_(Model‐C) with SFGM design shows a 45.02%and 43.75%improvement in the negative and positive flashover voltages than that of the virgin *** the end,COMSOL simulations are conducted to justify the experimental findings and to analyse the difference between virgin and modified samples in terms of electric field distribution.
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