Circulating current analysis in the parallel-connected windings of synchronous generators under abnormal operating conditions

In large synchronous generators, the windings are usually parallel-connected in order to deliver the normal characteristics at the terminals of the machines. Under normal conditions, there is no circulating current between the windings of one phase. But when a failure occurs like an eccentricity or...

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Bibliographic Details
Published inIEEE International Electric Machines and Drives Conference. IEMDC'99. Proceedings (Cat. No.99EX272) pp. 634 - 636
Main Authors Foggia, A., Torlay, J.-E., Corenwinder, C., Audoli, A., Herigault, J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1999
Subjects
Circuit faults
Costs
Finite element methods
Helium
Laboratories
Machine windings
Rotors
Sensor phenomena and characterization
Stators
Synchronous generators
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Summary:In large synchronous generators, the windings are usually parallel-connected in order to deliver the normal characteristics at the terminals of the machines. Under normal conditions, there is no circulating current between the windings of one phase. But when a failure occurs like an eccentricity or some other faults, the symmetry between parallel windings is broken and a circulating current will occur. The aim of this paper is to compute the current that circulates under faulty conditions like eccentricity and short-circuits in the rotor winding. A comparison with measurements made in a laboratory machine is also presented.
ISBN:0780352939
9780780352933
DOI:10.1109/IEMDC.1999.769198