Research Output
Diagnosis of Rotor and Stator Asymmetries in Wound-Rotor Induction Machines Under Nonstationary Operation Through the Instantaneous Frequency
  This paper proposes a methodology to improve the reliability of diagnosis of different types of faults in wound-rotor induction generators which work under variable load conditions, as in wind turbine applications; the method is based on the extraction of the instantaneous frequency (IF) of the fault-related components of stator and rotor currents during speed changes caused by nonstationary functioning. It is shown that, under these conditions, the IF versus slip plots of the fault components are straight lines with a specific slope and y-intercept for each kind of fault. In addition, neither of these patterns are dependent on the machine features or the way that the load changes. The practical methodology of this technique is introduced for diagnosing two different anomalies: stator winding asymmetry and rotor winding asymmetry. The approach is validated by laboratory tests for both types of faults in two different kinds of machines.

  • Type:

    Article

  • Date:

    30 September 2014

  • Publication Status:

    Published

  • Publisher

    Institute of Electrical and Electronics Engineers (IEEE)

  • DOI:

    10.1109/tie.2013.2288192

  • ISSN:

    0278-0046

  • Library of Congress:

    TK Electrical engineering. Electronics Nuclear engineering

  • Dewey Decimal Classification:

    621.3 Electrical & electronic engineering

Citation

Vedreno-Santos, F., Riera-Guasp, M., Henao, H., Pineda-Sanchez, M., & Puche-Panadero, R. (2014). Diagnosis of Rotor and Stator Asymmetries in Wound-Rotor Induction Machines Under Nonstationary Operation Through the Instantaneous Frequency. IEEE Transactions on Industrial Electronics, 61(9), 4947-4959. https://doi.org/10.1109/tie.2013.2288192

Authors

Keywords

wind generation, Analytic signal (AS), discrete wavelet transform (DWT), fault diagnosis, Hilbert transform (HT), induction generator, instantaneous frequency (IF), load fluctuating conditions, time–frequency analysis

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