Performance Analysis of Synchronous Generators Under Stator Windings Ground Faults Near the Star Point - Experimental Verification

In this article, a comprehensive mathematical model for synchronous generators under stator winding faults near the star point is described. The model is developed using the Modified Winding Function. The model includes space harmonics and their effects on windings inductances. The model is verified...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 2020-09, Vol.35 (3), p.1402-1410
Main Authors: Jaafari, Khaled Al, Toliyat, Hamid A.
Format: Article
Language:English
Subjects:
Air gaps
Atmospheric modeling
Coils (windings)
Computer simulation
Faults
Finite element method
Generators
Ground fault
Harmonic analysis
Mathematical analysis
mathematical model
Mathematical models
Model accuracy
modified winding function
stator winding
Stator windings
Stators
synchronous generators
Two dimensional analysis
Two dimensional models
Winding
Windings
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Description
Summary:In this article, a comprehensive mathematical model for synchronous generators under stator winding faults near the star point is described. The model is developed using the Modified Winding Function. The model includes space harmonics and their effects on windings inductances. The model is verified using electromagnetic analysis through 2D Finite Element Analysis simulation and experimental testing. The results prove the accuracy of the proposed mathematical model in reflecting the features of synchronous generators under stator windings ground faults in different parts of the winding and specifically near the star point. The developed modeling technique can be used for designing protections schemes for the very challenging 100% stator winding ground fault protection. The model enables protection designers to obtain rich set of data for protection relays designing and testing.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2020.2980619