Effect of Frequency on Degradation in BOPP Films Under Repetitively Pulsed Voltage  

作　　者：Chuansheng Zhang Yu Feng Fei Kong Bangdou Huang Cheng Zhang Tao Shao 

机构地区：[1]Beijing International S&T Cooperation Base for Plasma Science and Energy Conversion,Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《CSEE Journal of Power and Energy Systems》2024年第3期1280-1290,共11页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported in part by the National Natural Science Foundation of China-State Grid Joint Fund for Smart Grid under Grant U2166215.

摘　　要：Operating conditions of film capacitors are complex,and the problem of film insulation failure caused by repetitively pulsed voltage is becoming ever serious.Degradation of the film under repetitively pulsed voltage cannot be accurately evaluated by the average breakdown electric field.In this paper,the effects of pulsed electric field and pulse repetition frequency on the breakdown in biaxially oriented polypropylene(BOPP)films are investigated.Three phases of BOPP degradation are proposed based on the voltage amplitude,i.e.,maintenance(M),decline(D),and near-zero(N).Evolution of the BOPP film from degradation to breakdown at different frequencies is presented.Meanwhile,transition of discharge mode and elemental composition of the film are analyzed.Experimental results show continuous heat generation under repetitive microsecond pulses is the dominant factor for degradation of BOPP film.The number of applied pulses and the repetitive stressing time decrease exponentially with increase of frequency.This research can be contributed to the safe and reliable operation of capacitors.

关 键 词：AGING BREAKDOWN film capacitor POLYPROPYLENE repetitive pulse 

分 类 号：TM53[电气工程—电器]