电容器用金属化高温电介质薄膜的自愈性能研究  

Study on self-healing properties of metallized high-temperature dielectric films for capacitors

作　　者：朱家峰 佟辉 曹诗沫 刘俊标[1,3] 彭文飞 ZHU Jiafeng;TONG Hui;CAO Shimo;LIU Junbiao;PENG Wenfei(Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;College of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院电工研究所,北京100190 [2]宁波大学机械工程与力学学院,浙江宁波315211 [3]中国科学院大学,北京100049

出　　处：《电工电能新技术》2024年第1期1-13,共13页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51907187);中国科学院电工研究所基金项目(E155440301)。

摘　　要：现代电力电子系统的高温应用迫切需要耐高温的金属化膜电容器(MFC)。虽然已有大量研究表明高温电介质膜具有令人满意的储能性能,但其自愈性能尚不清楚,而该性能是决定高温电介质膜能否应用到MFC中的关键。本文主要研究了聚萘二甲酸乙二醇酯(PEN)、聚醚醚酮(PEEK)和聚酰亚胺(PI)三种金属化高温电介质膜在直流高电压下的自愈性能,具体分析了层间压强、卷绕张力和温度等外部因素对自愈性能的影响。结果表明,PI由于碳含量高,在实验中很容易击穿短路导致自愈失败,不适合应用到MFC中。PEEK的自愈性能受层间压强和卷绕张力的影响较大,应用到MFC后需重点考虑卷绕张力和卷绕层数。PEN具有较低的碳含量和优异的脂肪族-芳香族交替结构,且在各项研究中均表现出较为优异的自愈性能。从自愈角度来看,PEN适合成为高温强电场MFC用的绝缘电介质材料。High temperature resistant metallized film capacitors(MFC)are urgently needed for high temperature applications in modern power electronic systems.While a large number of studies have shown that high temperature dielectric films have satisfactory energy storage properties,the self-healing properties are not yet known and this property is the key to determine whether high temperature dielectric films can be used in MFC.In this paper,the self-healing properties of three metallized high temperature dielectric films,namely,Polyethylene naphthalate(PEN),Polyether ether ketone(PEEK)and Polyimide(PI),at DC high voltage were investigated.The effects of external factors such as interlayer pressure,winding tension and temperature on the self-healing properties were specifically analysed.The results showed that PI is not suitable for application in MFC because of its high carbon content,which causes that is easy to breakdown and short-circuit in the experiment and lead to self-healing failure.The self-healing performance of PEEK is greatly affected by the interlayer pressure and winding tension.The winding tension and the number of winding layers should be considered after the application of PEEK in MFC.PEN has low carbon content and excellent aliphatic-aromatic alternating structure,and has shown excellent self-healing properties in various studies.From the perspective of self-healing,PEN is suitable as an insulating dielectric material for high temperature and strong electric field MFC.

关 键 词：自愈 金属化高温电介质膜 层间压强 卷绕张力 温度 

分 类 号：TM855[电气工程—高电压与绝缘技术]