Preparation and Electrical Properties of Insulation Paper Composed of SiO2 Hollow Spheres

Energies

Ruijin Liao¹  Fuzhou Zhang¹  Yuan Yuan¹  Lijun Yang¹  Tuan Liu¹ 

[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China; E-Mails:

关键词: SiO₂ hollow spheres;    relative permittivity;    electrical properties;    breakdown voltage;   

DOI  :  10.3390/en5082943

来源: mdpi

【 摘 要 】

SiO₂ hollow spheres and low relative permittivity insulation paper handsheets composed of these SiO₂ hollow spheres with different weight percentages were successfully prepared. Low-content SiO₂ hollow spheres were uniformly dispersed in the insulation paper handsheets. The relative permittivity of the immersed oil Kraft-SiO₂ hollow sphere handsheets (K-SiO₂) initially decreased and then increased with increased amount of SiO₂ hollow spheres. K-5% SiO₂ possessed the lowest relative permittivity of approximately 1.68 at 50 Hz. The breakdown voltage of the paper-oil-paper composite insulation system increased from 26.4 kV to 30.5 kV with decreased relative permittivity of the paper from 2.55 to 1.68. The relationship between the relative permittivity and electric field strength of typical samples were also calculated.

【 授权许可】

CC BY   
© 2012 by the authors; license MDPI, Basel, Switzerland.