摘要
糠醛分析法作为一种有效的化学分析方法,被广泛应用于油浸式变压器绝缘老化评估中。现有研究主要聚焦于建立油中糠醛浓度与绝缘纸聚合度(DP)之间的数学模型,然而传统模型中的参数缺乏物理意义。提出了基于DP累积损失动力学方程的糠醛-DP模型。首先,对油纸绝缘样品开展加速热老化试验,使用黏度计和高效液相色谱法分别测定绝缘纸的DP和油中糠醛的浓度。其次,建立DP累积损失的动力学方程。最后,建立了基于DP累积损失动力学方程的糠醛-DP模型。结果表明,DP累积损耗动力学方程能较好地描述DP与老化时间t的关系,并且本文提出的糠醛-DP模型能有效地评估绝缘纸的老化状态,这一研究结果将有助于提高糠醛分析法评估变压器绝缘纸老化状态的准确性。
Furfural analysis, as an effective chemical analysis method, is widely used in insulation aging evaluation of oil immersed transformer. The existing researches mainly focus on establishing the mathematical model between the concentration of furfural in oil and the degree of polymerization(DP) of insulating paper. In this paper, a furfural DP model based on the kinetic equation of DP cumulative loss is proposed. Firstly, accelerated thermal aging test was carried out on oil paper insulation samples. DP of insulation paper and furfural concentration in oil were determined by viscometer and high performance liquid chromatography, respectively. Secondly, the kinetic equation of DP cumulative loss is established. Finally, a furfural DP model based on DP cumulative loss kinetic equation was established. The results show that the dynamic equation of DP cumulative loss can well describe the relationship between DP and aging time t, and the furfural DP model proposed in this paper can effectively evaluate the aging state of insulation paper. This research result will help to improve the accuracy of Furfural analysis method in evaluating the aging state of transformer insulation paper.
作者
耿楚涵
张镱议
刘捷丰
张玉波
万福
杨贤
何平
王涛
周柯
GENG Chuhan;ZHANG Yiyi;LIU Jiefeng;ZHANG Yubo;WAN Fu;YANG Xian;HE Ping;WANG Tao;ZHOU Ke(School of Electrical Engineering,Guangxi University,Guangxi 530004,China;Electric Power Research Institute of Guangxi Power Grid Co.,Ltd.,Guangxi 530023,China;School of Electrical Engineering,Chongqing University,Chongqing 400044,China;Guangdong Electric Power Research Institute,Guangdong Power Grid Co.,Ltd.,Guangdong 510080,China;Baoding Tianwei Xinyu Technology Development Co.,Ltd.,Hebei 071000,China;Guangxi Liuzhou Special Transformer Co.,Ltd.,Guangxi 545000,China)
出处
《集成电路应用》
2021年第5期192-194,共3页
Application of IC
基金
国家自然科学基金(51867003,52007036)
广西自然科学基金(2018JJB160064)。
关键词
变压器
油浸绝缘
糠醛
老化状态
transformer
oil immersed insulation
Furfural
aging state
