IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v14y2021i23p7908-d687656.html
   My bibliography  Save this article

Oil Pressure Monitoring for Sealing Failure Detection and Diagnosis of Power Transformer Bushing

Author

Listed:
  • Jiansheng Li

    (State Grid Jiangsu Electric Power Co. Ltd. Research Institute, Nanjing 211103, China)

  • Zhi Li

    (Jiangsu Key Laboratory of New Energy Generation and Power Conversion, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)

  • Judong Chen

    (State Grid Jiangxi Maintenance Company, Nanchang 330001, China)

  • Yifan Bie

    (Maintenance Branch of Chongqing State Grid Power Company, Chongqing 400039, China)

  • Jun Jiang

    (Jiangsu Key Laboratory of New Energy Generation and Power Conversion, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)

  • Xiaoping Yang

    (Jiangsu Frontier Electric Technology Co. Ltd., Nanjing 211102, China)

Abstract

Power transformer bushings withstand great electrical and mechanical stress during high voltage and high current working conditions. Sealing failure poses a great threat to the long-term and reliable operation of the bushing and power transformer; however, the criterion to evaluate the sealing status of a bushing caused by mechanical problems is still lacking. In this paper, a transformer bushing model is established to gain theoretical insight into the relationship between temperature and pressure of a compact multilayer bushing. To evaluate the bushing mechanical status, different sealing conditions are tested based on the temperature and pressure monitoring within the physical 110 kV bushing. The results show that mechanical sealing failure can be diagnosed when the fluctuation of the oil pressure value exceeds the theoretical curve in steady state by 3 kPa. With different reliability coefficients, gas leakage and oil leakage are available to be further determined. The primary and auxiliary criteria based on oil pressure and its gradient are proposed to evaluate comprehensively the actual sealing condition of the bushing, and a wireless oil pressure module is developed at the bottom valve, which is quite beneficial to field online application. It is promising to extend the online mechanical monitoring and diagnosis to oil-immersed power equipment.

Suggested Citation

  • Jiansheng Li & Zhi Li & Judong Chen & Yifan Bie & Jun Jiang & Xiaoping Yang, 2021. "Oil Pressure Monitoring for Sealing Failure Detection and Diagnosis of Power Transformer Bushing," Energies, MDPI, vol. 14(23), pages 1-17, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:23:p:7908-:d:687656
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/14/23/7908/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/14/23/7908/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Bo Qi & Quanmin Dai & Chengrong Li & Zipeng Zeng & Mingli Fu & Ran Zhuo, 2018. "The Mechanism and Diagnosis of Insulation Deterioration Caused by Moisture Ingress into Oil-Impregnated Paper Bushing," Energies, MDPI, vol. 11(6), pages 1-12, June.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Krzysztof Walczak & Jaroslaw Gielniak, 2021. "Temperature Distribution in the Insulation System of Condenser-Type HV Bushing—Its Effect on Dielectric Response in the Frequency Domain," Energies, MDPI, vol. 14(13), pages 1-18, July.
    2. Zhonghuan Su & Longfu Luo & Jun Liu & Zhongxiang Li & Hu Luo & Haonan Bai, 2022. "The Study of VFTO Distribution in the Insulation System of IOCT Used in Traction Network," Energies, MDPI, vol. 15(2), pages 1-13, January.
    3. Mingxi Zhu & Liming Wang & Fanghui Yin & Masoud Farzaneh & Hongwei Mei & Lu Wen, 2018. "The Effect of a Vertical Electric Field on the Surface Flashover Characteristics of a Bushing Model," Energies, MDPI, vol. 11(6), pages 1-14, June.
    4. Tomasz N. Kołtunowicz & Konrad Kierczynski & Pawel Okal & Aleksy Patryn & Miroslav Gutten, 2022. "Diagnostics on the Basis of the Frequency-Temperature Dependences of the Loss Angle Tangent of Heavily Moistured Oil-Impregnated Pressboard," Energies, MDPI, vol. 15(8), pages 1-14, April.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:14:y:2021:i:23:p:7908-:d:687656. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.