摘要
对由普通25#矿物油、以Biotemp为代表的植物油和普通绝缘纸、热稳定纸组成的4种油纸绝缘试品在90、110和130℃ 3种温度下开展了热老化实验,测量并记录了老化过程中绝缘纸的聚合度、油中糠醛、CO、CO2以及油酸值和微水含量等老化特征参数和变化规律,并首次系统地对比分析了不同绝缘组合的老化特性,探索不同绝缘材料老化生成物的相关性关系,为传统的老化特征参量应用于不同油纸绝缘系统的老化诊断提供了依据,并为拓展变压器寿命预测理论奠定了基础。
Four types of oil-paper samples are thermally aged in three temperatures of 90, 110 and 130℃. The samples are constituted by 25# mineral oil, Biotemp oil, ordinary Kraft paper and thermally-upgraded paper. Some aging indicators including degree polymerization of insulation paper, furfural, CO, CO2 content in oil, and acid, water content in oil are measured during the aging process. The correlation and difference between properties of degradation product and different types of samples are investigated in this paper for the first time. This research will provide a reference to apply the conventional insulation aging diagnostic techniques to different types of oil-papers insulation systems, and lay a basis for developing the lifetime prediction theory of power transformers.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2008年第22期53-58,共6页
Proceedings of the CSEE
基金
国家杰出青年科学基金项目(50425722)~~
关键词
油纸绝缘
热老化
电力变压器
聚合度
老化特征参数
老化诊断
oil-paper insulation
thermal aging
powertransformer
degree polymerization
aging characteristics
aging diagnosis
