DocumentCode
886178
Title
Determination of negative-sequence resistance of turbo-generators from rated-frequency standstill tests
Author
Neidhoefer, G.J. ; Subbarao, V.S.
Author_Institution
Brown, Boveri & Co. Ltd., Baden, Switzerland
Volume
3
Issue
1
fYear
1988
fDate
3/1/1988 12:00:00 AM
Firstpage
132
Lastpage
139
Abstract
Systematic analysis and comparison of standstill and rotational test results for a large number of turbogenerators in the range of 30 to 1300 MVA and having various damper systems, shows that the ratio of negative-sequence resistance to mean subtransient resistance varies in a narrow range of ±10% around 0.85. This corresponds to an increase of about 1.5 to 1.85 times in the equivalent rotor resistance when the frequency is doubled, in contrast to the figure of √2 quoted in literature. Additional verification is obtained from frequency-response tests on one of the machines investigated
Keywords
electric resistance measurement; machine testing; rotors; turbogenerators; 30 to 1300 MVA; damper systems; frequency-response tests; machine testing; negative-sequence resistance; rated-frequency standstill tests; rotational test; rotor resistance; subtransient resistance; turbogenerators; Bars; Frequency; Iron; Manufacturing; Performance evaluation; Stators; Synchronous machines; System testing; Tellurium; Voltage;
fLanguage
English
Journal_Title
Energy Conversion, IEEE Transactions on
Publisher
ieee
ISSN
0885-8969
Type
jour
DOI
10.1109/60.4213
Filename
4213
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