A Novel Dynamic Rotor Interturn Short Circuit Model on Rotor Electromagnetic Vibration Investigation for Synchronous Generators

Sun, Kai; He, Yu-Ling; Wu, Xue-Wei; Zhang, Fengyu; Gerada, David; Gerada, Chris

Abstract

In the early stages of Rotor Interturn Short Circuit (RISC) for synchronous generators, the short circuit is often unstable and intermittent, leading to what is known a Dynamic Rotor Interturn Short Circuit (DRISC). However, most existing research primarily addresses the stable form of the short circuit, termed Static Rotor Interturn Short Circuit (SRISC). In this paper, a novel DRISC model is proposed to assess the generator condition quickly and accurately. The model considers key parameters such as the number of shorted turns, the position of the short circuit, the contact resistance, and the load power. The model successfully explains the electromagnetic vibration behavior of the rotor, which is influenced by the DRISC. To validate the DRISC model, finite element calculations and experiments are conducted on a 5kW prototype generator. The rotor mechanical response is obtained due to the unbalanced magnetic pull, which aligns with the DRISC model prediction. This paper provides essential theoretical support and computational process paradigm for condition assessment under the DRISC fault in synchronous generators, augmenting existing research system on RISC.

Citation

Sun, K., He, Y.-L., Wu, X.-W., Zhang, F., Gerada, D., & Gerada, C. (2025). A Novel Dynamic Rotor Interturn Short Circuit Model on Rotor Electromagnetic Vibration Investigation for Synchronous Generators. IEEE Transactions on Transportation Electrification, https://doi.org/10.1109/TTE.2025.3575537

• Journal Article Type: Article
• Acceptance Date: May 22, 2025
• Publication Date: Jun 2, 2025
• Deposit Date: Jul 16, 2025
• Publicly Available Date: Jul 17, 2025
• Journal: IEEE Transactions on Transportation Electrification
• Electronic ISSN: 2332-7782
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1109/TTE.2025.3575537
• Public URL: https://nottingham-repository.worktribe.com/output/50162898
• Publisher URL: https://ieeexplore.ieee.org/document/11020998