Simplified Damper Cage Circuital Model and Fast Analytical–Numerical Approach for the Analysis of Synchronous Generators

Nuzzo, Stefano; Bolognesi, Paolo; Gerada, Chris; Galea, Michael

Abstract

The long and enduring history of utilization of the wound-field synchronous generator in a large number of applications makes it one of the most known and consolidated electrical machine technologies. Thus, its design, modeling, and analysis processes have been widely exploited and implemented through various and different methods, including the equivalent circuit approach. When a damper cage is embedded within the rotor of the synchronous generator, its theoretical analysis becomes quite complicated. Thus, today numerical tools are being used. In this paper, an alternative way of modeling symmetric damper cages of salient-pole synchronous generators is presented. The proposed approach is embedded in the circuital model of the generator. A hybrid analytical-numerical model is implemented, permitting to accurately predict the voltage waveforms of the generator with excellent accuracy, however, at a lower cost of computational resources than the pure numerical method. A case study of an off-the-shelf 400 kVA machine is considered to develop and validate the proposed technique. The results are compared with the corresponding finite-element and experimental evaluations for validation purposes.

Citation

Nuzzo, S., Bolognesi, P., Gerada, C., & Galea, M. (2019). Simplified Damper Cage Circuital Model and Fast Analytical–Numerical Approach for the Analysis of Synchronous Generators. IEEE Transactions on Industrial Electronics, 66(11), 8361-8371. https://doi.org/10.1109/tie.2018.2885737

• Journal Article Type: Article
• Acceptance Date: Nov 19, 2018
• Online Publication Date: Dec 13, 2018
• Publication Date: 2019-11
• Deposit Date: Apr 8, 2020
• Publicly Available Date: Apr 8, 2020
• 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: 66
• Issue: 11
• Pages: 8361-8371
• DOI: https://doi.org/10.1109/tie.2018.2885737
• Keywords: Control and Systems Engineering; Electrical and Electronic Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/2469766
• Publisher URL: https://ieeexplore.ieee.org/document/8575135
• Additional Information: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works.