Research on the dielectric properties and breakdown voltage of transformer oil-paper insulation after accelerating thermal ageing

Author

Tang, Chao ; Liao, Rui-jin ; Yang, Li-jun ; Huang, Fei-long

Author_Institution

State Key Lab. of Power Transm. Equip. & Syst. Security & New Technol., Chongqing Univ., Chongqing, China

fYear

2010

fDate

11-14 Oct. 2010

Firstpage

389

Lastpage

392

Abstract

In this paper, a set of accelerate thermal ageing experiments on oil immersed insulation paper were performed under 110□ and lasted for more than 100 days. The degree of polymerization (DP), the frequency domain spectroscopy (FDS) and water concentration in insulating oil and paper, as well as the AC breakdown voltage of insulation paper were tested and analyzed. The results indicate that the dielectric properties can be used as indicators for the degradation evaluation of insulation paper. And the breakdown voltage of paper showed very little difference after accelerating thermal ageing, the electrical strength of oil-paper insulation system depends mainly on the performance of insulating oil.

Keywords

ageing; electric breakdown; electric strength; insulating oils; AC breakdown voltage; degree of polymerization; dielectric properties; electrical strength; frequency domain spectroscopy; oil immersed insulation paper; thermal ageing; transformer oil-paper insulation; water concentration; Aging; Dielectrics; Oil insulation; Petroleum; Power transformer insulation;

fLanguage

English

Publisher

ieee

Conference_Titel

High Voltage Engineering and Application (ICHVE), 2010 International Conference on

Conference_Location

New Orleans, LA

Print_ISBN

978-1-4244-8283-2

Type

conf

DOI

10.1109/ICHVE.2010.5640744

Filename

5640744