Influence of Double Percolation Network of Semi-conductive Shielding Materials on Resistivity Stability of High Voltage Cable

被引：0
|
作者：
Jia L. [1 ]
Zeng J. [1 ]
Hou S. [2 ]
Zhan Y. [2 ]
Fu M. [2 ]
Zhao L. [1 ]
机构：
[1] College of Electrical Engineering, Sichuan University, Sichuan Province, Chengdu
[2] Electric Power Research Institute of China Southern Power Grid, Guangdong Province, Guangzhou
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2024年 / 44卷 / 12期
关键词：
double percolation network; high voltage cable; low density polyethylene; semi-conducting shielding materials;
D O I：
10.13334/j.0258-8013.pcsee.230452
中图分类号：
学科分类号：
摘要：
Semi-conductive shielding materials are the key raw materials of high-voltage cables, but there are still problems of high volume resistivity and poor stability. Herein, we propose the idea of constructing double percolation network, semi-conductive shielding material is prepared by using low-density polyethylene (LDPE) and ethylene-butyl acrylate copolymer (EBA) matrix as polymer matrixes, and high-quality conductive carbon black (CB) as the conductive filler. The structure evolution law of the semi-conductive shielding materials is systematically studied, and the key properties, such as crystallization behavior, electrical properties, mechanical properties and surface finish, are evaluated. The experimental results show that when the mass ratio of EBA to LDPE is 6:4, double percolation network is formed inside the semi-conductive shielding materials. Compared with CB/EBA composites, the volume resistivity at 23 and 90℃ decreases by 46.7% and 74.4%, respectively, and the corresponding positive temperature coefficient (PTC) is reduced by 52.1%. The results show that the semi-conductive shielding materials have good resistivity and stability when the mass ratio of EBA to LDPE is 6:4. At the same time, it has excellent mechanical properties and surface finish. This study provides a theoretical basis and data support for the development of semi-conductive shielding materials for high-voltage cables. ethylene-butyl acrylate copolymer ©2024 Chin.Soc.for Elec.Eng. 5011.
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页码：5011 / 5020
页数：9
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