Frequency domain characteristics and insulation condition evaluation of power transformer oil-paper insulation

Author

Tang, Ming-jie ; Lei, Min ; Xu, Hao ; Lu, Yun-cai ; Wei, Xu ; Wu, Peng ; Zhang, Guan-jun

Author_Institution

State Key Lab. of Electr. Insulation & Power Equip., Xi´´ an Jiaotong Univ., Xi´´an, China

fYear

2012

fDate

17-20 Sept. 2012

Firstpage

443

Lastpage

446

Abstract

Based on the platform designed for thermal aging test of oil-paper insulation system, the problem of thermal aging of solid insulation used in the oil-paper insulation of power equipment has been studied. The method of Frequency Domain Spectrum (FDS) has been applied to obtain frequency domain dielectric response properties of oil immersed paper insulation, and an unscrambling method according to Universal Relaxation Law (URL) has been proposed and the characteristic frequency parameter f_p used to describe dielectric response properties of oil immersed paper insulation has been extracted from FDS data. It shows that the proposed unscrambling method and the characteristic frequency parameter f_p are effective in aging condition assessment of oil-paper insulation.

Keywords

ageing; frequency-domain analysis; paper; power apparatus; power transformer insulation; transformer oil; FDS; URL; aging condition assessment; frequency domain dielectric response; frequency domain spectrum; insulation condition evaluation; oil immersed paper insulation; oil-paper insulation system; power equipment; power transformer insulation; solid insulation; thermal aging test; universal relaxation law; unscrambling method; Aging; Dielectrics; Frequency domain analysis; Insulation; Moisture; Power transformers; Temperature; FDS; URL; aging condition; characteristic frequency parameter; unscrambling method;

fLanguage

English

Publisher

ieee

Conference_Titel

High Voltage Engineering and Application (ICHVE), 2012 International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4673-4747-1

Type

conf

DOI

10.1109/ICHVE.2012.6357145

Filename

6357145