高压直流金属化薄膜电容器绝缘性能提升方法研究进展  

Research Progress in Improving Insulation Properties of HVDC Metalized Film Capacitor

作　　者：肖萌 陈毓妍 赵亦烁 杜伯学 XIAO Meng;CHEN Yuyan;ZHAO Yishuo;DU Boxue(School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学电气自动化与信息工程学院,天津300072

出　　处：《高电压技术》2024年第6期2319-2331,共13页High Voltage Engineering

基　　金：国家自然科学基金(92266111,52177023,U1966203)。

摘　　要：金属化薄膜电容器因其具有优异的绝缘特性与自愈性能,被广泛用作高压直流输电等先进能源系统的核心设备,其绝缘介质聚丙烯薄膜是制约电容器安全可靠运行的重要因素。文中系统梳理了高压直流电容器用金属化聚丙烯薄膜的研究进展,基于聚丙烯薄膜的微观结构、运行工况及电极设计,提出了薄膜介质目前面临的风险及挑战。总结了提升聚丙烯薄膜耐受极端环境的绝缘改性方法,介绍了基于微观结构调控、本体掺杂、界面改性及多层结构设计的聚丙烯薄膜材料改性方法,并阐述了复合薄膜设计、安全膜设计、方阻设计等金属电极设计方法的发展进程。该研究将为服役于高压直流输电系统中电容器的绝缘设计、生产和运行维护提供参考。Metalized film capacitors are widely used as the core equipment of advanced energy systems such as high-voltage direct current(HVDC)transmission systems due to their excellent insulation characteristics and self-healing properties.The insulating dielectric polypropylene film is an important factor restricting the safe and reliable operation of capacitors.In this paper,we systematically sort out the research progress of insulating dielectric for HVDC capacitors,and summarize the current risks and challenges faced by the films based on the microstructure,operating conditions,and electrode design of polypropylene film.Moreover,we explore insulation modification methods to enhance the resistance of polypropylene films to extreme environments,and introduce material modification methods for polypropylene films based on microstructure regulation,intrinsic doping,interface treatment and multilayer structural design,as well as the development process of metal electrode design methods based on composite film design,safety film design,and asymptotic square resistor design.The paper will provide a reference for the insulation design,production and operation and maintenance of capacitors in service in high-voltage direct current transmission systems.

关 键 词：高压直流电容器 聚丙烯薄膜 绝缘性能 材料改性 击穿强度 

分 类 号：TM53[电气工程—电器] TM721.1