Relationship between partial discharge pulse height analysis and subsequent voltage endurance of stator bars and coils

Author

McDermid, W. ; Bromley, J.C.

Author_Institution

Manitoba Hydro, Winnipeg, Man., Canada

Volume

7

Issue

4

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

721

Lastpage

731

Abstract

A method has been developed for screening stator bars and coils using a particular type of partial discharge (PD) detector. The objective in making PD screening tests was to identify those bars or coils which are more likely to fail on voltage endurance in a relatively short time. The majority of the examples given pertain to a project involving ten hydroelectric generators which had a total of 10800 stator bars. Evidence is presented which suggests that the test method is more sensitive to internal discharges than to those associated with the end grading surfaces

Keywords

failure analysis; hydroelectric generators; machine testing; partial discharges; reliability; stators; between partial discharge pulse height analysis; failure analysis; hydroelectric generators; internal discharges; machine testing; project; reliability; screening tests; stator bars; stator coils; voltage endurance; Circuit testing; Coils; Instruments; Insulation; Partial discharges; Pulse measurements; Stator bars; Stator windings; Stress; Voltage;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.182655

Filename

182655