Effect of nanoparticles on electrical characteristics of transformer oil-based nanofluids impregnated pressboard

Author

Zhou You ; Zhong Yu-xiang ; Chen Mu-tian ; Zhang Sheng-nan ; Du Yue-fan ; Lv Yu-zhen ; Li Chengrong ; Liu Tong

Author_Institution

Beijing Key Lab. of High Voltage & EMC, North China Electr. Power Univ., Beijing, China

fYear

2012

fDate

10-13 June 2012

Firstpage

650

Lastpage

653

Abstract

In order to improve the electrical characteristics of transformer oil-impregnated pressboard, transformer oil-based nanofluids were used to impregnate pressboards. It is found that nanofluid-impregnated pressboard (NP) exhibits substantially higher AC and DC breakdown voltage than that of pure oil-impregnated pressboard (OP). Pulse electroacoustic measurement (PEA) was carried out to study the difference of space charge distribution and decay characteristic in OP and NP. It has demonstrated that NP has a more uniform internal electric field, which is caused by a higher charge transport rate compared to OP, resulting in the improved electrical insulating properties.

Keywords

acoustic measurement; electric breakdown; impregnated insulation; nanoparticles; transformer oil; AC breakdown voltage; DC breakdown voltage; charge transport rate; decay characteristic; electrical characteristics; electrical insulating properties; internal electric field; nanoparticles; pulse electroacoustic measurement; space charge distribution; transformer oil-based nanofluid impregnated pressboard; Electric fields; Nanoparticles; Oil insulation; Partial discharges; Power transformer insulation; Voltage measurement; breakdown voltage; charge transport; nanofluid; oil-impregnated pressboard;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation (ISEI), Conference Record of the 2012 IEEE International Symposium on

Conference_Location

San Juan, PR

ISSN

1089-084X

Print_ISBN

978-1-4673-0488-7

Electronic_ISBN

1089-084X

Type

conf

DOI

10.1109/ELINSL.2012.6251552

Filename

6251552