Statistical estimation method of remaining BDV and life expectancy for generator stator winding by using nondestructive insulation diagnostic data

Author

Nakayama, Akinobu

Author_Institution

Fuji Electr. Corp. Res. & Dev. Ltd., Kawasaki, Japan

Volume

2

fYear

1999

fDate

1999

Firstpage

528

Abstract

With the aim of properly estimating the remaining breakdown voltage (BDV) and life expectancy of generator stator winding insulation from nondestructive insulation diagnosis data, we have collected BDV and nondestructive data of the stator windings removed from 15 generators with rated voltage of 6.6 to 15.4 kV. Recently, we have calculated statistical correlation between BDV and nondestructive data for these coils, established statistical method of estimating remaining BDV by nondestructive insulation characteristics and multiple regression analysis, and are applying diagnosis for the operating generators

Keywords

electric breakdown; epoxy insulation; statistical analysis; stators; windings; 6.6 to 15.4 kV; BDV; generator stator winding; life expectancy; multiple regression analysis; nondestructive insulation diagnostic data; remaining breakdown voltage; statistical correlation; statistical estimation method; Character generation; Dielectrics and electrical insulation; Epoxy resins; Hydraulic turbines; Insulation testing; Life estimation; Nondestructive testing; Performance evaluation; Stator windings; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on

Conference_Location

Austin, TX

Print_ISBN

0-7803-5414-1

Type

conf

DOI

10.1109/CEIDP.1999.807858

Filename

807858