Electromechanical Characteristics Analysis under DSISC Fault in Synchronous Generators

He, Yu-Ling; Qiu, Ming-Hao; Yuan, Xing-Hua; He, Xian-Long; Wang, Hai-Peng; Jiang, Meng-Ya; Gerada, Chris; Wan, Shu-Ting

Abstract

This paper studies the electromechanical characteristics of synchronous generators under dynamic stator interturn short circuit (DSISC). First, the air gap magnetic flux density (MFD) of the generator under normal and DSISC fault was obtained. Then, the expression for the phase current and the electromagnetic torque (EMT) were obtained. After this, the phase current and EMT were analyzed by finite element analysis (FEA). Finally, the measured electromechanical characteristics of the CS-5 generator under different conditions were analyzed in accordance with theory and simulation. It was shown that with the occurrence, and deterioration, of DSISC, the amplitude of the first harmonic, third harmonic and fifth harmonic of the phase current became more affected by the pulse. Meanwhile, the even-numbered harmonics components of EMT increased.

Citation

He, Y.-L., Qiu, M.-H., Yuan, X.-H., He, X.-L., Wang, H.-P., Jiang, M.-Y., Gerada, C., & Wan, S.-T. (2022). Electromechanical Characteristics Analysis under DSISC Fault in Synchronous Generators. Machines, 10(6), Article 432. https://doi.org/10.3390/machines10060432

• Journal Article Type: Article
• Acceptance Date: May 26, 2022
• Online Publication Date: Jun 1, 2022
• Publication Date: 2022-06
• Deposit Date: Jan 15, 2025
• Publicly Available Date: Jan 17, 2025
• Journal: Machines
• Electronic ISSN: 2075-1702
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 10
• Issue: 6
• Article Number: 432
• DOI: https://doi.org/10.3390/machines10060432
• Keywords: synchronous generator; dynamic stator interturn short circuit (DSISC); electromagnetic torque (EMT); phase current; harmonic component
• Public URL: https://nottingham-repository.worktribe.com/output/38366687
• Publisher URL: https://www.mdpi.com/2075-1702/10/6/432