电力电容器传热模型计算及温度寿命预测研究  

Research on heat transfer model calculation and temperature life prediction of power capacitor

作　　者：刘伟 张健 LIU Wei;ZHANG Jian(State Grid Heilongjiang Electric Power Co.,Ltd.Electric Power Research Institute,Harbin 150030,China)

机构地区：[1]国网黑龙江省电力有限公司电力科学研究院,哈尔滨150030

出　　处：《黑龙江电力》2020年第6期491-496,共6页Heilongjiang Electric Power

摘　　要：为研究电力电容器最热点温度及寿命特性,建立了电容器介质传热模型,计算了该模型下的变工况特性,推导了电容器温度寿命的具体表达式、实验及计算数据,验证了模型的有效性及温度寿命函数表达式的准确性。变工况计算结果表明:随着环境温度及电容器容量的增加,内部及外壳最热点温度呈增加趋势;随着电容器电流的减小,电容值、电容量、电容器发热量均呈降低趋势;随着电容器电流的增加,电容值、电容量、电容器发热量、最高点温度呈增加趋势。研究内容为电力电容器最热点温度间接测量、故障诊断及寿命预测提供了技术参考。In order to study the hottest-spot temperature and life characteristics of power capacitor,a dielectric heat transfer model of power capacitoris established,the variable operating characteristics under the model are calculated,and the specific expressions of capacitor temperature life is derived.Experiments and calculation data verifies the validity of the model and the accuracy of temperature life function expression.The calculation results of variable operating conditions show that with the increase of ambient temperature and capacitor capacity,the hottest-spot temperature of the inner and outer shell increases;as the capacitor current decreases,the capacitance value,capacitance and heat generation of capacitor decrease;with the increase of capacitor current,the capacitance value,capacitance heat generation of capacitor and the maximum temperature of capacitor increase.The research content provides technical reference for indirect temperature measurement,fault diagnosis and life prediction of the hottest-spot of power capacitor.

关 键 词：电力电容器 最热点温度 传热计算模型 变工况特性 间接测量 寿命预测 

分 类 号：TM934[电气工程—电力电子与电力传动]