水分和酸对油纸绝缘老化的协同加速作用研究  

Collaborative Acceleration Effect of Moisture and Acid on Ageing of Oil-paper Insulation

作　　者：彭倩[1] 段宗超 何良[1] 黎成林[2] 刘益岑[1] 辛东立 

机构地区：[1]国网四川省电力公司电力科学研究院,成都610072 [2]西南交通大学电气工程学院,成都610031

出　　处：《绝缘材料》2015年第1期49-52,63,共5页Insulating Materials

基　　金：四川省电力公司科技项目(ZYDQ201311006)

摘　　要：为研究水分和酸对油纸绝缘老化的协同加速作用,将不同初始含水量的绝缘纸和不同初始含酸量的绝缘油组成的油纸绝缘在110℃下进行加速热老化试验,并对其老化后绝缘纸的聚合度进行测试分析。结果表明:随着水分和酸初始含量的增加,油纸绝缘的初始降解速率和老化各阶段的平均降解速率均增加。单独增加油纸复合绝缘中的水分或酸含量时,绝缘纸在各个老化时间段的平均降解速率增加不明显。当油纸复合绝缘中的水分和酸的含量同时增加时,则绝缘纸在各个老化时间段的平均降解速率增加显著。酸添加量相同时,分子量越小的酸对绝缘纸的加速老化作用越明显。To study the collaborative acceleration effect of moisture and acid on the ageing of oil-paper insulation, we carried out the accelerating thermal ageing experiment for the oil-paper insulation composed of the insulating paper with different initial moisture content and the insulating oil with different initial acid content, and the degree of polymerization（DP） of the insulating paper after thermal ageing was tested and analyzed. The results show that with the increase of the initial moisture and acid content, the initial degradation rate and the average degradation rate of the oil-paper insulation at different ageing stages increase. When the moisture content or the acid content increases only, the increase of average degradation rate at different ageing stages is not obvious. When the moisture and acid content increase together, the increase of average degradation rate of the insulation paper at different ageing stages is significant. With the same acid addition, the accelerating ageing effect of the acid with smaller molecular weight on the insulating paper is more significant.

关 键 词：水分 酸 油纸绝缘 聚合度 加速老化 降解速率 

分 类 号：TM852[电气工程—高电压与绝缘技术]