Gas Generation Difference Analysis of Ester Insulating Oil Under Different Discharge Energy

被引：0
|
作者：
Xing Y. [1 ]
Dong M. [1 ]
Liu Y. [1 ]
Hu Y. [1 ]
Yu J. [1 ]
Xi Y. [1 ]
Xu Y. [1 ]
机构：
[1] State Key Library of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Shaanxi Province, Xi’an
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 15期
基金：
中国国家自然科学基金;
关键词：
difference analysis; discharge energy; dissolved gas; ester insulating oil;
D O I：
10.13334/j.0258-8013.pcsee.220513
中图分类号：
学科分类号：
摘要：
Ester insulating oils are increasingly being used in power transformers as environmental-friendly insulating fluid. However, there are significant differences in the physicochemical and electrical properties of different ester insulating oils, and their gas generation laws under the same fault type are also somewhat different. In this paper, natural, modified and synthetic esters are used to study the gas generation law and differences at different discharge energies, and the correlation between characteristic gas content and discharge energy is analyzed. The results show that there are some differences in the gas generation law of ester insulating oil with different molecular structures and compositions. Natural esters are prone to produce more H2 and C2H6, while modified esters and synthetic esters are prone to produce more C2H4 and C2H2. Differences in the molecular structure of the insulating oil and the dissolution characteristics of the gases are the main reasons for the dissolved gases in oil. With the increase of discharge energy, the relative percentage contents of H2, CH4 and C2H6 decrease, while the relative percentage contents of C2H2, C2H4 and CO increase. In addition, the severity of the discharge fault can be qualitatively determined by fault gas volumes per unit fault energy, the ratio of C2H2/H2 and the CO content, which can provide reference for the state diagnosis of ester insulating oil transformers. ©2023 Chin.Soc.for Elec.Eng.
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页码：6099 / 6111
页数：12
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