发电机环氧云母绝缘的老化白度特性与寿命评估  

Characteristics of AgeingWhiteness and Life Evaluation of Epoxy-mica Insulation for Generators

作　　者：赵德宇 石颉 ZHAO Deyu;SHI Jie(School of Electronic and Information Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学电子与信息工程学院,江苏苏州215009

出　　处：《绝缘材料》2021年第7期75-80,共6页Insulating Materials

摘　　要：为探究环氧云母绝缘老化过程中的光学特性,对发电机定子线棒环氧云母主绝缘进行了电-热加速老化处理,测量了不同电压及温度下线棒试样的蓝光白度值,分析了老化对环氧云母绝缘材料光折射率和吸收系数的影响,利用回归分析确定了蓝光白度值与老化时间的方程关系,并通过t检验证明方程的有效性。最后,利用蓝光白度值的变化特性结合Fallou模型对环氧云母主绝缘的绝缘寿命进行拟合分析。结果表明:环氧云母绝缘的蓝光白度值随绝缘老化程度的加深不断下降,利用Weibull分布概率值结合Fallou模型可以实现环氧云母绝缘的寿命评估。In order to investigate the optical properties of epoxy-mica insulation in ageing process,we conducted multi-factor accelerated ageing treatment on epoxy-mica main insulation of generator stator bars.The blue whiteness of the samples at different voltage and temperature was measured,and the effect of ageing on the optical refractive index and absorption ratio of epoxy-mica insulation material was analyzed.The equation relationship between blue whiteness and ageing time was determined by regression analysis,and the validity of equation was proved by t test.Finally,the insulation life of epoxy-mica main insulation was fitted and analyzed by the variation characteristics of blue whiteness combining with Fallou model.The results show that the blue whiteness value of epoxy-mica insulation decreases constantly with the increase of ageing degree of insulation.Combining Weibull distribution probability with Fallou model,we can realize the life assessment of epoxy-mica insulation.

关 键 词：环氧云母绝缘 光学特性 蓝光白度 加速老化 回归分析 寿命评估 

分 类 号：TM215[一般工业技术—材料科学与工程]