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Improved damper cage design for salient-pole synchronous generators

Nuzzo, Stefano; Degano, Michele; Galea, Michael; Gerada, C.; Gerada, David; Brown, N.L.

Authors

Stefano Nuzzo

MICHELE DEGANO Michele.Degano@nottingham.ac.uk
Professor of Advanced Electrical Machines

Michael Galea

DAVID GERADA D.Gerada@nottingham.ac.uk
Professor of Electrical Engineering

N.L. Brown



Abstract

© 2016 IEEE. The benefits of implementing a damper winding in salient-pole synchronous generators are widely known and well consolidated. It is also well known that such a winding incurs extra losses in the machine due to a number of reasons. In order to improve the overall efficiency and performance of classical salient-pole, wound field synchronous generators that employ the traditional damper cage, an improved amortisseur winding topology that reduces the inherent loss is proposed and investigated in this paper. This is essential in order to meet modern power quality requirements and to improve the overall performance of such "classical" machines. The new topology addresses the requirements for lower loss components without compromising the acceptable values of the output voltage total harmonic distortion and achieves this by having a modulated damper bar pitch. As vessel for studying the proposed concept, a 4-MVA salient-pole synchronous generator is considered. A finite element model of this machine is first built and then validated against experimental results. The validated model is then used to investigate the proposed concept with an optimal solution being achieved via the implementation of a genetic algorithm optimization tool. Finally, the performance of the optimized machine is compared to the original design both at a steady state and transient operating conditions.

Citation

Nuzzo, S., Degano, M., Galea, M., Gerada, C., Gerada, D., & Brown, N. (2017). Improved damper cage design for salient-pole synchronous generators. IEEE Transactions on Industrial Electronics, 64(3), 1958-1970. https://doi.org/10.1109/TIE.2016.2619321

Journal Article Type Article
Acceptance Date Sep 20, 2016
Online Publication Date Oct 20, 2016
Publication Date Mar 1, 2017
Deposit Date Nov 10, 2016
Publicly Available Date Mar 29, 2024
Journal IEEE Transactions on Industrial Electronics
Print ISSN 0278-0046
Electronic ISSN 1557-9948
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 64
Issue 3
Pages 1958-1970
DOI https://doi.org/10.1109/TIE.2016.2619321
Keywords shock absorbers, salient-pole synchronous generator, asymmetric rotor winding, damper cage design, harmonic analysis, iron losses calculation
Public URL https://nottingham-repository.worktribe.com/output/822450
Publisher URL http://ieeexplore.ieee.org/document/7600356/
Additional Information (c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

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