Title :
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
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;
Conference_Titel :
Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on
Conference_Location :
Himeji
Print_ISBN :
4-88686-053-2
DOI :
10.1109/ISEIM.2001.973757
