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Improving Hilbert–Huang transform for energy-correlation fluctuation in hydraulic engineering

Author

Listed:
  • Lu, Shibao
  • Zhang, Xiaoling
  • Shang, Yizi
  • Li, Wei
  • Skitmore, Martin
  • Jiang, Shuli
  • Xue, Yangang

Abstract

Intense vibrations in hydraulic turbine generator unit draft tubes lead to a run-out of the unit shafting and threaten its safe and stable operation. Correct maintenance is therefore important for the safe operation of such units. This study involves assessing the condition of the turbine generator unit by extracting the feature information of its vibration signals. Based on previous research, we present an enhanced Hilbert–Huang transform (HHT) method with an energy-correlation fluctuation criterion to extract feature information and effectively verify the method with simulated signals. An inspection application based on the signal from a vortex strip in the draft tube of a prototype turbine under suboptimal operating conditions indicates that this method is more effective than the traditional one, with a better component identification capability and better suited to the analysis of the complex and dynamic feature information of hydro turbines.

Suggested Citation

  • Lu, Shibao & Zhang, Xiaoling & Shang, Yizi & Li, Wei & Skitmore, Martin & Jiang, Shuli & Xue, Yangang, 2018. "Improving Hilbert–Huang transform for energy-correlation fluctuation in hydraulic engineering," Energy, Elsevier, vol. 164(C), pages 1341-1350.
    • Handle: RePEc:eee:energy:v:164:y:2018:i:c:p:1341-1350
    DOI: 10.1016/j.energy.2018.08.088
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    References listed on IDEAS

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    Cited by:

    1. Zheng, Xianghao & Li, Hao & Zhang, Suqi & Zhang, Yuning & Li, Jinwei & Zhang, Yuning & Zhao, Weiqiang, 2023. "Hydrodynamic feature extraction and intelligent identification of flow regimes in vaneless space of a pump turbine using improved empirical wavelet transform and Bayesian optimized convolutional neura," Energy, Elsevier, vol. 282(C).
    2. Zheng, Xianghao & Zhang, Suqi & Zhang, Yuning & Li, Jinwei & Zhang, Yuning, 2023. "Dynamic characteristic analysis of pressure pulsations of a pump turbine in turbine mode utilizing variational mode decomposition combined with Hilbert transform," Energy, Elsevier, vol. 280(C).
    3. Barbosa de Santis, Rodrigo & Silveira Gontijo, Tiago & Azevedo Costa, Marcelo, 2021. "Condition-based maintenance in hydroelectric plants: A systematic literature review," MPRA Paper 115912, University Library of Munich, Germany.

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