Effect of Ageing on Insulating Property of Mineral Oil-based TiO2 Nanofluids

Author

Du Yue-fan ; Yu-zhen, Lv ; Jian-quan, Zhou ; Mu-tian, Chen ; Xiao-xin, Li ; Cheng-rong, Li

Author_Institution

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

fYear

2011

fDate

26-30 June 2011

Firstpage

1

Lastpage

4

Abstract

A class of mineral oil-based nanofluid has been developed by modifying mineral oil with TiO₂ nanoparticle to enhance their dielectric performance. In this paper, we present the investigation results of aged nanofluids, which have been subjected to accelerated aging condition of 130°C for 6 days. Both AC breakdown voltage and PDIV tests were carried out according to ASTM standards respectively. It was found that AC breakdown voltage of nanofluids has been largely improved before and after aging 6 days. The mean value of PDIV in aged nanofluid achieves an increase of 1.16 times than that of mineral oil. In addition, the results of statistical data indicate that 1% probability breakdown voltage of nanofluid is 78.34kV, which is 8kV higher than that of mineral oil. The experimental results demonstrated that both breakdown voltage and PDIV of mineral oil can be significantly improved by modifying with TiO₂ nanoparticles.

Keywords

ageing; electric breakdown; insulating materials; insulating oils; nanofluidics; nanoparticles; partial discharges; titanium compounds; AC breakdown voltage; ASTM standard; PDIV tests; TiO₂; aged nanofluid; ageing effect; dielectric performance; insulating property; mineral oil-based nanofluid; nanoparticle; partial discharge inception voltage; probability breakdown voltage; temperature 130 degC; time 6 day; voltage 78.34 kV; voltage 8 kV; Aging; Breakdown voltage; Minerals; Oil insulation; Partial discharges; Power transformer insulation; TiO2 nanoparticle; breakdown strength; mineral oil; nanofluid;

fLanguage

English

Publisher

ieee

Conference_Titel

Dielectric Liquids (ICDL), 2011 IEEE International Conference on

Conference_Location

Trondheim

ISSN

2153-3725

Print_ISBN

978-1-4244-7352-6

Electronic_ISBN

2153-3725

Type

conf

DOI

10.1109/ICDL.2011.6015444

Filename

6015444