温湿度联合作用下金属化膜电容器的寿命预测  

Life Prediction of Metallized Film Capacitor Under the Combined Action of Temperature and Humidity

作　　者：刘刚 姚成 贾磊[1,2] LIU Gang;YAO Cheng;JIA Lei(Electric Power Research Institute,CSG,Guangzhou 510663,China;National Engineering Research Center of UHV Technology and Novel Electrical Equipment Basis,Kunming 651705,China)

机构地区：[1]南方电网科学研究院有限责任公司,广州510663 [2]特高压电力技术与新型电工装备基础国家工程研究中心,昆明651705

出　　处：《电力电容器与无功补偿》2025年第1期35-39,共5页Power Capacitor & Reactive Power Compensation

基　　金：特高压电力技术与新型电工装备基础国家工程研究中心开放基金项目(NERCUHV⁃2022⁃KF⁃03)。

摘　　要：金属化膜电容器(MFC)在长期应用过程中,不可避免地会受到较高温度与湿度的影响,高湿热环境加速了电容器电极腐蚀,造成电容量减少。针对这一问题,本文基于THB加速老化试验得到不同温湿度下MFC的寿命数据,采用了二参数的Weibull分布模型对MFC寿命参数进行计算,结合Arrhenius模型、逆幂律模型与Hallberg Peck模型,得到不同温度条件下的寿命加速因子,并分析了温度和湿度对MFC寿命影响。结果表明,不同温湿度条件下的MFC,随着温度和湿度的增加,电容量下降加快,电容器寿命减小,相对于湿度,温度对MFC寿命的不利影响更为显著。随着温度和湿度的上升,MFC寿命Weibull分布向寿命减小的方向迁移,为MFC寿命预测研究与应用提供有效参考。Metallized film capacitor(MFC)is inevitably affected by higher temperatures and humidity during the long term application,which accelerates the electrode corrosion rate and reduces capacitance.In view of this issue,in this paper the life data of MFC under different temperature and humidity conditions is obtained based on the THB accelerated aging test,the two-parameter Weibull distribution model is used to calculate the MFC life parameters,and the life acceleration factors under different temperature conditions are obtained by combining the Arrhenius model,the inverse power law model and the Hallberg Peck model,and the influence of temperature and humidity on the life of MFC is analyzed.The results show that for the MFC under different temperature and humidity,with the increase of temperature and humidity,the capacitance decreases fast and the life of capacitor reduces,the adverse effect of temperature on the MFC life is more significant than that of humidity.With the increase of temperature and humidity,the Weibull distribution of MFC life migrates in the direction of decreasing life,which provides effective reference for the life prediction and application of MFC.

关 键 词：金属化膜电容器 老化 高温高湿 寿命预测 

分 类 号：TM53[电气工程—电器]