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Impact of Radial Air-Gap Eccentricity on Stator End Winding Vibration Characteristics in DFIG

Author

Listed:
  • Ming-Xing Xu

    (Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China)

  • Yu-Ling He

    (Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China)

  • Wen Zhang

    (Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China)

  • De-Rui Dai

    (Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China)

  • Xiang-Ao Liu

    (Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China)

  • Wen-Jie Zheng

    (Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China)

  • Shu-Ting Wan

    (Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China)

  • David Gerada

    (Power Electronics, Machines and Control Group, University of Nottingham, Nottingham NG7 2RD, UK)

  • Shan-Zhe Shi

    (State Grid Hebei Electric Power Company, Shijiazhuang 050022, China)

Abstract

In this paper, qualitative theoretical derivations, finite element analysis (FEA) and experiments are used to investigate the electromagnetic force (EF) and vibration characteristics of end windings. In contrast to previous studies, this study focuses not only on end winding EF/vibration under normal and radial static air gap eccentricity (RSAGE) conditions, but also for the cases of radial dynamic air gap eccentricity (RDAGE) and radial dynamic static hybrid air gap eccentricity (RHAGE). Firstly, the magnetic flux density (MFD) is derived for normal and radial air gap eccentricity (RAGE) faults, and detailed EF expressions are obtained before and after the RAGE fault. The finite element analysis (FEA) and experimental studies were performed on a four-pole DFIG at a speed of 1500 rpm to verify the proposed theoretical analysis. It is shown that RSAGE only enlarges the EF/end winding vibration and does not introduce new frequency components. RDAGE not only increases EF/end winding vibration but also introduces new frequency components. RHAGE can be seen as a superimposed effect of RSAGE and RDAGE.

Suggested Citation

  • Ming-Xing Xu & Yu-Ling He & Wen Zhang & De-Rui Dai & Xiang-Ao Liu & Wen-Jie Zheng & Shu-Ting Wan & David Gerada & Shan-Zhe Shi, 2022. "Impact of Radial Air-Gap Eccentricity on Stator End Winding Vibration Characteristics in DFIG," Energies, MDPI, vol. 15(17), pages 1-12, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:17:p:6426-:d:905266
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    References listed on IDEAS

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    1. Gui-Ji Tang & Hong-Chun Jiang & Yu-Ling He & Qing-Fa Meng, 2020. "Electromagnetic Forces and Mechanical Responses of Stator Windings before and after Rotor Interturn Short Circuit in Synchronous Generators," Mathematical Problems in Engineering, Hindawi, vol. 2020, pages 1-19, December.
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