On single-phase operation of three-phase synchronous generators

Spagnolo, C.; Nuzzo, S.; Giangrande, P.; Galea, M.; Serra, G.

Abstract

Classical synchronous generators have been used for decades in the field of power generation. The traditional manner of operation of these systems is the balanced, three phase configuration. However, recently there has been an interest in re-configuring consolidated, commercial, three phase generators to operate in single phase operation. A main driver for this phenomenon is the aim of manufacturers to extend their range of products for minimum development cost. Such an approach however brings a number of design challenges, especially in terms of the elevated damper cage currents and the negative sequence currents, when a 3-phase machine is `forced' to operate in 1-phase. This paper therefore investigates and analyses these challenges. Considering a commercial, 3-phase, 400 kVA alternator. Detailed models, validated against experimental validation in 3-phase operation are first obtained. The machine is then re-configured to single phase operation. This paper proposes and shows how a suitable single phase loading can be found for 3-phase generators operating in single phase.

Citation

Spagnolo, C., Nuzzo, S., Giangrande, P., Galea, M., & Serra, G. (2020). On single-phase operation of three-phase synchronous generators. In ICEMS2020 Web Remote Conference, The 23rd International Conference on Electrical Machines and Systems, November 24 to 27, 2020 (1994-1999). https://doi.org/10.23919/icems50442.2020.9290872

• Conference Name: 2020 23rd International Conference on Electrical Machines and Systems (ICEMS)
• Conference Location: Hamamatsu, Japan
• Start Date: Nov 24, 2020
• End Date: Nov 27, 2020
• Acceptance Date: Jun 26, 2020
• Online Publication Date: Dec 22, 2020
• Publication Date: Nov 24, 2020
• Deposit Date: Feb 26, 2021
• Publicly Available Date: Feb 26, 2021
• Publisher: Institute of Electrical and Electronics Engineers
• Pages: 1994-1999
• Series Title: International Conference on Electrical Machines and Systems (ICEMS)
• Series ISSN: 2640-7841
• Book Title: ICEMS2020 Web Remote Conference, The 23rd International Conference on Electrical Machines and Systems, November 24 to 27, 2020
• ISBN: 9781728189307
• DOI: https://doi.org/10.23919/icems50442.2020.9290872
• Keywords: Shock absorbers, Loading, Iron, Windings, Load modeling, Stator windings, Rotors
• Public URL: https://nottingham-repository.worktribe.com/output/5352850
• Publisher URL: https://ieeexplore.ieee.org/document/9290872
• Additional Information: © 2020 IEEEJ. 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.