水分和氧气对油纸绝缘老化的影响  

Effect of Moisture and Oxygen on the Aging of Oil-paper Insulation

作　　者：隋彬[1] 李延涛[2] 吴广宁[2] 李先浪[2] 卢剑[2] 李伟[2] 

机构地区：[1]二滩水电开发有限责任公司,成都610051 [2]西南交通大学电气工程学院,成都610031

出　　处：《绝缘材料》2013年第4期43-47,共5页Insulating Materials

基　　金：铁道部科技研究开发计划(编号:2009J007-A)

摘　　要：为探究水分和氧气对油纸绝缘老化过程的影响机理,通过设计不同水分和氧气含量的矿物油纸绝缘在不同温度下的加速热老化试验,测量其绝缘纸聚合度和油中糠醛浓度,并验证了水分、氧气影响因素条件下聚合度变化对二阶动力学模型参数的影响。结果表明:水分和氧气对油纸绝缘加速老化作用明显;水分含量较低时,水分和氧气有相互抑制作用,油中氧气会阻止水分和纤维素相互作用,并且随着氧气含量的增加其作用越来越明显,从而降低绝缘纸的老化速率;水分和氧气含量及绝缘纸类型会影响老化过程中糠醛的变化趋势。To study the influence mechanism of moisture and oxygen on the aging process of oil-paper in- sulation, by designing the accelerated aging test of mineral oil-paper insulation with various moisture and oxygen content under different temperature, the degree of polymerization（DP） of insulation paper and fur- rural concentration in oil were measured, and the effects of the degree change of polymerization on the second-order kinetics model parameters under the influence of moisture and oxygen were verified. The re- sults indicate that the role of water and temperature on the accelerated aging of the oil-paper insulation is obvious. When the moisture content is lower, there is an antagonistic effect between water and oxy- gen. The oxygen in oil would prevent the interaction between water and cellulose, and with the increase of oxygen content, the interaction would become more obvious, making the aging rate of insulating paper reduce. The moisture and oxygen content and the type of insulation paper would affect the furfural change trend during aging process.

关 键 词：油纸绝缘 水分含量 氧气 聚合度 糠醛 

分 类 号：TM214[一般工业技术—材料科学与工程] TM215[电气工程—电工理论与新技术]