含双氰胺的新型绝缘纸制备及其油纸绝缘体系热老化试验  

Preparation of a dicyandiamide-contained novel insulation paper and an experiment on the thermal aging characteristics of relevant oil-paper insulations

作　　者：廖瑞金[1] 张福州[1] 袁媛[1] 张爽[1] 柏舸[1] 刘团[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2013年第7期47-51,共5页Journal of Chongqing University

基　　金：国家创新研究群体基金资助项目(51021005);国家重点基础研究发展计划项目(2009CB724505-1);输配电装备及系统安全与新技术国家重实验室资助项目(2007DA10512708103)

摘　　要：为研究老化过程中绝缘纸中双氰胺对油纸绝缘体系老化特性的影响,实验室制备含双氰胺以及未加任何试剂的空白样绝缘纸,两种绝缘纸分别浸油后在130℃下进行了31天的油纸联合热老化试验。定期取样测量绝缘纸的聚合度、击穿电压、氮含量,绝缘油的酸值以及油的紫外光谱。试验结果表明:添加双氰胺的绝缘纸抗老化效果明显,在老化末期,聚合度高出空白样58%;添加双氰胺的绝缘纸击穿电压在老化过程中始终高于空白样品;添加双氰胺的绝缘纸随着老化时间纸中氮含量减少并不严重;添加双氰胺的油纸组合,油的酸值远小于空白样油纸组合,油的颜色也浅。绝缘纸中双氰胺的加入,不但提高了绝缘纸的热稳定性与击穿性能,也使变压器油在老化过程中的性能得到改善。In order to study the influence of dicyandiamide added into the insulation paper on the oil-paper insulation during the aging process.The insulation paper containing dicyandiamide and the insulation paper without any stabilizer are prepared.They are immersed in transformer oil separately and placed in the aging chamber with predefined temperature of 130℃ for 31 days to perform thermal aging experiment of oil-paper insulation.The specimens are periodically sampled and some parameters are measured like the degree of polymerization（DP）,the breakdown voltage,the nitrogen content,the acidity of insulation oil,and UV-Vis spectrum.The results show that the insulation paper added with dicyandiamide has a distinct anti-aging and anti-breakdown effect and the DP is 58% higher than that of blank sample at the later stage of aging.In the aging process,decline of the nitrogen content of insulation paper is not serious.The oil-paper sample containing dicyandiamide has a far lower value of acidity than that of blank sample,besides the oil color is deeper.Dicyandiamide in the insulation paper improves not only the anti-aging and anti-breakdown properties,but also the performance of oil in the aging process.

关 键 词：热稳定性 双氰胺 聚合度 氮含量 酸值 老化 

分 类 号：TM215.4[一般工业技术—材料科学与工程]