期刊论文

Influence of Metal Material of Transformer on Oil-paper Insulation After Thermal Aging

Zhu, Zhiping(zzp8389@163.com)

中文

高电压技术

1003-6520

2019

45

9

2954-2963

10.13336/j.1003-6520.hve.20180822008

本校为第一且通讯机构

为研究变压器内部金属材料对油纸绝缘性能的影响,对25号环烷基矿物油A和油B、普通绝缘纸、金属铜、硅钢片组成的10种试样,在120 ℃的条件下进行热老化实验,跟踪测定老化过程中绝缘油酸值、介损、油中铜铁含量、糠醛含量、绝缘纸聚合度等老化特征参量和变化规律,并对脱油纸样进行宽频介电谱测试、扫描电镜和能谱分析。结果表明:硅钢片对绝缘油性能劣化影响较小,金属铜能增大样品介质损耗因数,加速油中糠醛的生成,使样品油酸值在老化后期达到无铜样品的2~3倍;金属材料的加入能导致绝缘纸聚合度下降变快,金属铜的作用大于硅钢片;随着热老化的进行,绝缘纸的介损值会逐渐增大,绝缘纸表面元素成分中碳...

To study the influences of metal materials of transformer on the oil-paper insulation performance, 10 types of insulating samples which were constituted by two kinds of 25 naphthene base mineral oil A and B, ordinary Kraft paper, copper and silicon steel sheets were thermally aged at 120℃ and sampled. Some ageing indicators including the oil acidity, dielectric dissipation factor, copper and iron content, furfural content and degree polymerization of insulating paper were measured during the ageing process, and the aging characteristics of dif...