Electromagnetic Torque Fluctuating Properties under Dynamic RISC Fault in Turbogenerators

He, Yuling; Qiu, Minghao; Yuan, Xinghua; Wang, Haipeng; Jiang, Mengya; Gerada, Chris; Wan, Shuting

Abstract

This paper analyzes the electromagnetic torque (EMT) fluctuation characteristics in synchronous generators under rotor interturn short-circuit (DRISC) fault. The novelty of this paper is that the DRISC fault is proposed based on the intermittent interturn short circuit existing in the actual operation and compared with the static rotor interturn short-circuit (SRISC) fault. In the work, by studying the influence of DRISC with different positions and different short-circuit degrees, the fluctuation characteristic of the EMT is analyzed and verified. The results show that when the DRISC5% fails, the location is in slot 3, the amplitude of first harmonic decreases by 7.2%, second harmonic amplitude increases by 33.4%, third harmonic decreases by 4.3%, and fourth harmonic increases by 26.8%. As the degree increased and positioned away from the large tooth of the DRISC, the overall EMT amplitude and reverse pulse increased, first and third harmonics decreased, and second and fourth harmonics increased.

Citation

He, Y., Qiu, M., Yuan, X., Wang, H., Jiang, M., Gerada, C., & Wan, S. (2022). Electromagnetic Torque Fluctuating Properties under Dynamic RISC Fault in Turbogenerators. Energies, 15(10), Article 3821. https://doi.org/10.3390/en15103821

• Journal Article Type: Article
• Acceptance Date: May 19, 2022
• Online Publication Date: May 23, 2022
• Publication Date: May 2, 2022
• Deposit Date: Jan 15, 2025
• Publicly Available Date: Jan 17, 2025
• Journal: Energies
• Electronic ISSN: 1996-1073
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 15
• Issue: 10
• Article Number: 3821
• DOI: https://doi.org/10.3390/en15103821
• Keywords: synchronous generator; dynamic rotor interturn short circuit (DRISC); electromagnetic torque (EMT); magneto-motive force (MMF); harmonic component
• Public URL: https://nottingham-repository.worktribe.com/output/38366384
• Publisher URL: https://www.mdpi.com/1996-1073/15/10/3821