高电压技术2018，Vol.44Issue(8)：2587-2594,8.DOI:10.13336/j.1003-6520.hve.20180731017
羧酸含量对变压器绝缘纸老化速度的影响
Influence of Acid Content on the Aging Rate of Insulating Papers in Transformers
摘要
Abstract
To study the effect of different content of carboxylic acid on the aging rate of transformer insulation paper, we studied the influence of carboxylic acid content on insulating paper aging. Firstly, the accelerated thermal aging experiments were conducted on the insulating paper. Then, the degree of polymerization (DP) of the insulating paper λDP was continuously measured during the experiments. Finally, a second-order kinetic model was applied to analyze the experimental data and a conclusion was reached. The results show that the unionized carboxylic acid does not depolymerize the cellulose, and the H+ ionized by the carboxylic acid has a strong catalytic effect on cellulose hydrolysis. When the insulating paper is in a dry state (water content w≤0.5％), the carboxylic acid ionization is inhibited and the content of ionized H+ is low, which has no obvious catalytic effect on the cellulose hydrolysis reaction. The influence of moisture content and acid value on the parameters of the second-order kinetic model is obtained, and the oil-paper insulation aging evaluation model system is further improved.关键词
油纸绝缘/老化/甲酸/水分/聚合度/二阶动力学模型Key words
oil-paper insulation/aging/formic acid/water/degree of polymerization/second-order kinetic model引用本文复制引用
辛东立,姚梦熙,徐正,高波,吴广宁..羧酸含量对变压器绝缘纸老化速度的影响[J].高电压技术,2018,44(8):2587-2594,8.基金项目
国家自然科学基金(51177136).Project supported by National Natural Science Foundation of China(51177136). （51177136）
