Title :
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
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;
Conference_Titel :
Condition Monitoring and Diagnosis (CMD), 2012 International Conference on
Conference_Location :
Bali
Print_ISBN :
978-1-4673-1019-2
DOI :
10.1109/CMD.2012.6416188
