Multi-factor ageing of stator coil insulation of HV machines and degree of correlation among non-destructive test parameters

Author

Mallikarjunappa, K. ; Viswanatha, C. ; Moorching, S.N.

Author_Institution

Central Power Res. Inst., Bangalore, India

fYear

1993

fDate

17-20 Oct 1993

Firstpage

562

Lastpage

567

Abstract

Multifactor accelerated ageing studied have been carried out on scaled-down model coils of an 11-kV insulation system. The test parameters tan delta tip-up (δT), capacitance tip-up (ΔC/C), integrated discharge energy (IDE), and discharge inception voltage (Vi) were monitored at regular intervals during the ageing period to characterize the ageing processes. Attempts have been made to find the correlation between different test parameters as a function of ageing time. A good correlation is found to exist between δT and δC/C. The degree of correlation between different test parameters tends to increase as the ageing proceeds

Keywords

ageing; insulation testing; insulator testing; life testing; stators; 11 kV; 11-kV insulation system; HV machines; ageing processes; capacitance tip-up; degree of correlation; discharge inception voltage; integrated discharge energy; multifactor accelerated ageing; stator coil insulation; tan delta tip-up; test parameters; Aging; Capacitance; Coils; Condition monitoring; Dielectrics and electrical insulation; Insulation testing; Nondestructive testing; Power system reliability; Stators; Thermal stresses;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1993. Annual Report., Conference on

Conference_Location

Pocono Manor, PA

Print_ISBN

0-7803-0966-9

Type

conf

DOI

10.1109/CEIDP.1993.378913

Filename

378913