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An Experimental Study of the Sweep Frequency Impedance Method on the Winding Deformation of an Onsite Power Transformer

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  • Song Wang

    (State Key Laboratory of Electrical Insulation and Power Equipment, Faculty of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Shuang Wang

    (State Key Laboratory of Electrical Insulation and Power Equipment, Faculty of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Ying Cui

    (State Grid Henan Electric Power Company Jiaozuo Power Supply Company, Jiaozuo 454002, China)

  • Jie Long

    (State Grid Henan Electric Power Company Jiaozuo Power Supply Company, Jiaozuo 454002, China)

  • Fuqiang Ren

    (State Key Laboratory of Electrical Insulation and Power Equipment, Faculty of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Shengchang Ji

    (State Key Laboratory of Electrical Insulation and Power Equipment, Faculty of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Shuhong Wang

    (State Key Laboratory of Electrical Insulation and Power Equipment, Faculty of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

Power transformers are one of the most important devices in electrical networks. The safety operation of the transformers directly affects the reliability of the power system. To diagnose the internal deformation of the transformer as soon as possible is of great significance. As a new technique, sweep frequency impedance (SFI) method has been used to detect the short-circuit fault of the transformer winding. However, the SFI method is still in the early stage and more experimental tests are needed to further demonstrate its accuracy in the detection of other types of winding faults. Therefore, in this paper, the SFI method is investigated to diagnose an open-circuit fault of an onsite transformer. By deeply analyzing the SFI curves and SFI values at power frequency obtained by the SFI test, the open-circuit fault of this transformer winding is determined. Meanwhile, the accuracy of the diagnostic results based on the SFI method is validated by introducing the results of the short-circuit impedance (SCI) and winding resistance measurements. The application of the SFI method on the detection of the open-circuit fault within the transformer winding not only enrich the SFI method research but also provide valuable practical guidance significance for the fault detection.

Suggested Citation

  • Song Wang & Shuang Wang & Ying Cui & Jie Long & Fuqiang Ren & Shengchang Ji & Shuhong Wang, 2020. "An Experimental Study of the Sweep Frequency Impedance Method on the Winding Deformation of an Onsite Power Transformer," Energies, MDPI, vol. 13(14), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:14:p:3511-:d:381610
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    References listed on IDEAS

    as
    1. Szymon Banaszak & Wojciech Szoka, 2018. "Cross Test Comparison in Transformer Windings Frequency Response Analysis," Energies, MDPI, vol. 11(6), pages 1-12, May.
    2. Qing Yang & Peiyu Su & Yong Chen, 2017. "Comparison of Impulse Wave and Sweep Frequency Response Analysis Methods for Diagnosis of Transformer Winding Faults," Energies, MDPI, vol. 10(4), pages 1-16, March.
    3. Ziwei Zhang & Wensheng Gao & Tusongjiang Kari & Huan Lin, 2018. "Identification of Power Transformer Winding Fault Types by a Hierarchical Dimension Reduction Classifier," Energies, MDPI, vol. 11(9), pages 1-19, September.
    4. Szymon Banaszak & Konstanty Marek Gawrylczyk & Katarzyna Trela, 2020. "Frequency Response Modelling of Transformer Windings Connected in Parallel," Energies, MDPI, vol. 13(6), pages 1-13, March.
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    Cited by:

    1. Jonathan Velasco Costa & Diogo F. F. da Silva & Paulo J. Costa Branco, 2022. "Large-Power Transformers: Time Now for Addressing Their Monitoring and Failure Investigation Techniques," Energies, MDPI, vol. 15(13), pages 1-59, June.
    2. Min-Soo Kim & Do-Hyun Kim & Dong-Keun Jeong & Jang-Mok Kim & Hee-Je Kim, 2020. "Soft Start-Up Control Strategy for Dual Active Bridge Converter with a Supercapacitor," Energies, MDPI, vol. 13(16), pages 1-19, August.

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