Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators

He, Yuling; Jiang, Mengya; Sun, Kai; Qiu, Minghao; Gerada, David

Abstract

A dynamic rotor interturn short circuit fault may occur during synchronous generator operation. However, there is no method to analyze the generator’s characteristics under the dynamic rotor interturn short circuit fault and identify the fault. In order to solve this problem, a new dynamic rotor interturn short circuit fault analysis model is creatively proposed through mathematical derivation. Firstly, the rotor vibration characteristics and the mechanical response under magnetic pull excitation are theoretically analyzed. In addition, a finite element modeling method for the dynamic rotor interturn short circuit fault is proposed, and an experimental device is designed. The model of a synchronous generator under the dynamic rotor interturn short circuit fault is established to obtain the rotor’s unbalanced magnetic pulls and mechanical responses by finite element calculation. Finally, the rotor vibrations are tested on a CS-5 prototype generator. The validity of the model is verified by finite element calculation and an experiment. This paper provides theoretical support for the diagnosis of a synchronous generator’s dynamic rotor interturn short circuit fault.

Citation

He, Y., Jiang, M., Sun, K., Qiu, M., & Gerada, D. (2023). Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators. Energies, 16(18), Article 6585. https://doi.org/10.3390/en16186585

• Journal Article Type: Article
• Acceptance Date: Sep 11, 2023
• Online Publication Date: Sep 13, 2023
• Publication Date: Sep 13, 2023
• Deposit Date: Nov 26, 2024
• Publicly Available Date: Nov 27, 2024
• Journal: Energies
• Electronic ISSN: 1996-1073
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 16
• Issue: 18
• Article Number: 6585
• DOI: https://doi.org/10.3390/en16186585
• Keywords: magnetic flux density, unbalanced magnetic pull, synchronous generator, dynamic rotor interturn short circuit, rotor vibration
• Public URL: https://nottingham-repository.worktribe.com/output/25954324
• Publisher URL: https://www.mdpi.com/1996-1073/16/18/6585