Temperature dependent electrical properties of thermoplastic polypropylene nanocomposites for HVDC cable insulation

被引:64
作者
Zhou, Yao [1 ]
Yuan, Chao [1 ]
Li, Chuanyang [1 ]
Meng, Pengfei [1 ]
Hu, Jun [1 ]
Li, Qi [1 ]
He, Jinliang [1 ]
机构
[1] Tsinghua Univ, State Key Lab Power Syst, Dept Elect Engn, Beijing 100084, Peoples R China
关键词
Nanocomposites; Nanoparticles; Temperature; Electric fields; Temperature measurement; Cable insulation; HVDC transmission; thermoplastic insulation; polypropylene; nanocomposites; high temperature; electrical conduction; space charge; HVDC cable; NANOPARTICLE SURFACE MODIFICATION; SPACE-CHARGE ACCUMULATION; BREAKDOWN; BLENDS;
D O I
10.1109/TDEI.2019.008198
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Polypropylene has been regarded as a potential recyclable insulation material for HVDC cable, which is beneficial to improve the working temperature and transmission capacity of HVDC cables. However, the electrical properties of polymeric insulation materials exhibit apparent temperature dependent characteristics. Temperature influences the generation and migration of charge carriers, thereby affecting the electrical properties. This paper focuses on the electrical properties of polypropylene nanocomposites at different temperatures, including volume resistivity, space charge and DC breakdown strength. The temperature dependent electrical properties of polypropylene are regulated by adding MgO nanoparticles. Based on the characterization of microstructure and trap characteristics, the mechanism of regulating the charge carrier transport process and the electrical properties of the nanocomposites by introducing MgO nanoparticles is explained. The polypropylene nanocomposites show decreased electrical conduction, suppressed space charge accumulation and increased DC breakdown strength, which are desirable for recyclable HVDC cable insulation application. This work may pave a way for tailoring the high temperature electrical properties of polymeric insulation material.
引用
收藏
页码:1596 / 1604
页数:9
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