An ultrasonic evaluation for degradation of insulating oil using fuzzy inference

Author

Nagamune, Kouki ; Kobashi, Syoji ; Kondo, Katsuya ; Hata, Yutaka ; Taniguchi, Kazuhiko

Author_Institution

Graduate Sch., Himeji Inst. of Technol., Hyogo, Japan

Volume

2

fYear

2003

fDate

5-8 Oct. 2003

Firstpage

1115

Abstract

Periodic inspection for degradation of insulating oil in transformers requires from preventing outage. However, conventional methods were not suitable for that, due to large size of the measurement system and requirement of sampling. This study aims to develop ultrasonic evaluation system satisfying these requirements aided by fuzzy interference. The system evaluates degradation, and it estimates kinetic viscosity. In the experiment, we applied our method into six kinds of insulating oils. As a result, correlation coefficient between our estimation and viscometer were over 0.92. thus, our method correctly determines degradation of insulating oil.

Keywords

fuzzy logic; inference mechanisms; transformer oil; ultrasonic measurement; viscosity; correlation coefficient; fuzzy inference; insulating oil degradation; kinetic viscosity; measurement system; outage prevention; periodic inspection; sampling requirement; transformers; ultrasonic evaluation system; viscometer; Degradation; Fuzzy systems; Inspection; Interference; Oil insulation; Petroleum; Power transformer insulation; Sampling methods; Size measurement; Ultrasonic variables measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics, 2003 IEEE Symposium on

Print_ISBN

0-7803-7922-5

Type

conf

DOI

10.1109/ULTSYM.2003.1293096

Filename

1293096