New diagnosis method of aging degradation for insulating paper in power transformers by measuring the refractive index of cellulose fibers

Author

Yoshida, Manabu ; Uchida, Kazunori ; Kato, Masaaki ; Konishi, Yasuo

Author_Institution

Electr. power R&D Center, Chubu Electr. Power Co., Inc., Nagoya, Japan

fYear

2012

fDate

23-27 Sept. 2012

Firstpage

56

Lastpage

59

Abstract

This paper proposes a new diagnosis method for aging degradation of insulating paper in power transformers. We took notice of cellulose fibers that suspended in insulating oil in transformers as useful samples for estimating degradation of insulating paper in transformers. The Mahalanobis-Taguchi System was applied for investigating the relationship between degradation and refractive indices of cellulose fibers measured. It was found that aging degradation of cellulose fibers on insulating paper accompanies a change of dispersion color. This result shows that it is capable to estimate degradation of the paper in oil-immersed power transformers by measuring dispersion color of fibers suspended in insulating oil.

Keywords

ageing; paper; power transformer insulation; refractive index measurement; transformer oil; Mahalanobis-Taguchi system; aging degradation; cellulose fibers; dispersion color; insulating oil; insulating paper; oil-immersed power transformers; refractive index measurement; Aging; Color; Degradation; Image color analysis; Optical fiber devices; Optical fiber dispersion; Aging; Cellulose; Diagnosis; Insulating Paper; Mahalanobis distance; Power Transformers; Refractive Index; degradation;

fLanguage

English

Publisher

ieee

Conference_Titel

Condition Monitoring and Diagnosis (CMD), 2012 International Conference on

Conference_Location

Bali

Print_ISBN

978-1-4673-1019-2

Type

conf

DOI

10.1109/CMD.2012.6416188

Filename

6416188