DocumentCode
1127921
Title
Turbogenerator field winding shorted turn detection by AC flux measurement
Author
Woschnagg, E.
Author_Institution
Generator Div., ELIN Energieversorgung GmbH, Weiz, Austria
Volume
9
Issue
2
fYear
1994
fDate
6/1/1994 12:00:00 AM
Firstpage
427
Lastpage
431
Abstract
A new testing technique for detecting shorted turns in turbogenerator rotors is presented, where the field winding is supplied with power frequency voltage as for a normal impedance measurement. The circumferential flux is measured in the centerline of all slot wedges and compared between individual poles by amplitude and/or phase. When the rotor is removed, the turn short can be localized by evaluating the AC flux distribution over turns. The coils may be accessed through ventilation holes or after disassembly of retaining rings
Keywords
fault location; machine testing; magnetic flux; magnetic variables measurement; rotors; turbogenerators; AC flux measurement; circumferential flux; poles; power frequency voltage; retaining rings; shorted turn detection; slot wedges; testing; turbogenerator rotors; ventilation holes; Coils; Fault detection; Impedance measurement; Length measurement; Magnetic field measurement; Probes; Rotors; Turbogenerators; Turning; Voltage;
fLanguage
English
Journal_Title
Energy Conversion, IEEE Transactions on
Publisher
ieee
ISSN
0885-8969
Type
jour
DOI
10.1109/60.300127
Filename
300127
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