Dielectric Properties of Nano-montmorillonite Modified Insulation Pressboard

被引：0
|
作者：
Chi M. [1 ]
Tao K. [1 ]
Chen Q. [1 ]
Liu H. [1 ]
Gao P. [1 ]
Gao Z. [2 ]
机构：
[1] Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin
[2] Electric Power Research Institute of State Grid Heilongjiang Power Company Limited, Harbin
来源：
Chi, Minghe (chiminghe1985@163.com) | 1600年 / Science Press卷 / 43期
基金：
中国国家自然科学基金;
关键词：
Converter transformer; Dielectric characteristics; Montmorillonite; Nano-modification; Oil-paper insulation;
D O I：
10.13336/j.1003-6520.hve.20170831010
中图分类号：
学科分类号：
摘要：
In order to study the influence of trap parameters on the dielectric characteristics of nano-montmorillonite (MMT) modification insulation pressboard, the manufacturing technology of MMT modified pressboard was developed by nano-doping method with laboratory devices. The characteristics of mechanical and dielectric properties were researched. The trap parameters were tested by thermally stimulated current (TSC) method, and the mechanism of nano-doping on characteristics of mechanical and dielectric property was analyzed. The measuring results show that the relative permittivity and tensile strength of modified pressboard are reducing at first and then rising with the increase of the content of nano-MMT. The conductivity of pressboard is increasing by nano-MMT doping, and the nonlinear inflection electric strength decreases gradually with the MMT filling rate growing. The breakdown strength of modified pressboard firstly increases and then decreases with the growth of nano-doping content. In addition, the dielectric property is analyzed by using the theory of energy band. The result shows that the increase of trap destiny results in the decrease of nonlinear conductivity. Besides, the breakdown strength increases with the increase of trap depth. Thus, it can be concluded that trap parameters have a remarkable effect on the dielectric characteristics of nano modified pressboard. © 2017, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：2842 / 2848
页数：6
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