Diagnosis method for high voltage coils based on electrical and tap tone characteristics

Author

Takeuchi, T. ; Asakawa, H. ; Hagiwara, S. ; Kamiya, H.

Author_Institution

Hitachi Ltd., Ibaraki, Japan

fYear

2001

fDate

2001

Firstpage

649

Lastpage

652

Abstract

A new diagnosis method for high voltage coils has been developed. In this method, two diagnosis techniques are involved. One is an evaluation method for breakdown voltage based on nondestructive electric characteristics and the other is a delamination detection technique using a neural pattern recognition system for tap tone signals of the insulation layer. The evaluated breakdown voltage value is corrected by a rectifying factor determined from the delamination form of the insulation layer

Keywords

coils; delamination; electric breakdown; electric generators; insulation testing; machine insulation; neural nets; pattern recognition; power engineering computing; stators; breakdown voltage estimation; delamination detection technique; diagnosis method; evaluation method; high voltage coils; high voltage generators; insulation layer; neural pattern recognition system; nondestructive electric characteristics; rectifying factor; stator winding; tap tone signals; Circuits; Coils; Delamination; Electric variables; Frequency; Insulation; Partial discharges; Pattern recognition; Stator windings; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on

Conference_Location

Himeji

Print_ISBN

4-88686-053-2

Type

conf

DOI

10.1109/ISEIM.2001.973757

Filename

973757