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Research on Online Detection Method of Transformer Winding Deformation Based on VFTO Characteristics

Author

Listed:
  • Xinghua Shi

    (Faculty of Science, Kunming University of Science and Technology, Kunming 650504, China)

  • Ran Wei

    (Faculty of Science, Kunming University of Science and Technology, Kunming 650504, China)

  • Wenbin Zhang

    (College of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650504, China)

Abstract

At present, most of the winding fault detections of transformers use offline methods, which require the entire line to be powered off or after the transformer has been shut down due to a serious fault, and they cannot detect the running status of the windings in real time and online. Since the transformer will be impacted by VFTO during operation, the VFTO is used as the excitation, and the basic principle of the frequency response method is used to propose an online detection method of transformer winding deformation based on VFTO characteristics. The finite element software is used to calculate the equivalent circuit parameters of normal and deformed windings, and the equivalent circuit model of the transformer windings before and after deformation is established. Due to the uncertainty of the VFTO waveform, combined with the frequency response method, the VFTO waveform is injected into the transformer winding health, and the frequency response curve is obtained from the deformed equivalent circuit, which is used to analyze the change of the resonance point in the case of radial deformation, axial deformation, and axial displacement of the winding. The simulation results show that with VFTO as the excitation, the obtained resonance point change can comprehensively reflect the deformation information of the winding. At the same time, the feasibility of the method is verified by experiments.

Suggested Citation

  • Xinghua Shi & Ran Wei & Wenbin Zhang, 2023. "Research on Online Detection Method of Transformer Winding Deformation Based on VFTO Characteristics," Energies, MDPI, vol. 16(8), pages 1-23, April.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:8:p:3496-:d:1125546
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    References listed on IDEAS

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    1. Song Wang & Ze Guo & Ting Zhu & Hanke Feng & Shuhong Wang, 2018. "A New Multi-Conductor Transmission Line Model of Transformer Winding for Frequency Response Analysis Considering the Frequency-Dependent Property of the Lamination Core," Energies, MDPI, vol. 11(4), pages 1-12, April.
    2. Konstanty M. Gawrylczyk & Szymon Banaszak, 2021. "Recent Developments in the Modelling of Transformer Windings," Energies, MDPI, vol. 14(10), pages 1-22, May.
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    Cited by:

    1. Jiawei Wang & Yijing Xing & Xikui Ma & Zhiwei Zhao & Lihui Yang, 2023. "Numerical Investigations for Vibration and Deformation of Power Transformer Windings under Short-Circuit Condition," Energies, MDPI, vol. 16(14), pages 1-18, July.

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