Analysis of Microstructure and Electrical Properties of Oil-impregnated Insulation Paper Under Different AC/DC Composite Voltages

被引：0
|
作者：
Ouyang X. [1 ]
Zhou Q. [1 ]
Li X. [2 ]
Jiang Q. [1 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University), Shapingba District, Chongqing
[2] Xuzhou Maintenance Branch of Jiangsu State Grid, Xuzhou, 221000, Jiangsu Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 24期
基金：
中国国家自然科学基金;
关键词：
AC/DC composite voltages; Electrical performance; Microstructure; Oil-impregnated insulation paper; Partial discharge (PD);
D O I：
10.13334/j.0258-8013.pcsee.190742
中图分类号：
学科分类号：
摘要：
The effect of partial discharge on the microstructure and electrical properties of insulation paper in AC/DC environment needs to be analyzed, in order to evaluate the performance of oil-impregnated insulation paper in converter transformers. In this paper, the discharge damage test platform of oil-impregnated insulation paper under AC/DC composite voltage was built. The changes of microstructure and electrical properties of materials under different composite voltages and their mutual correlation mechanism were explored. The results show that under different composite voltages, the degradation mechanism of microstructure and electrical performance are consistent. Partial discharge will cause the microscopic surface of the insulation paper to be gradually damaged, accompanied with the breakage of glycosidic bonds in cellulose, the production of carboxyl solid materials. The parameters of the insulation paper, such as dielectric constant, conductivity and dielectric loss, increase. Due to the influence of the distribution law of the complex voltage and the space charge, the increase of DC voltage ratio will slow down the deterioration of the microstructure and electrical properties of the insulation paper. © 2019 Chin. Soc. for Elec. Eng.
引用
收藏
页码：7394 / 7404
页数：10
相关论文
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