IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v13y2020i7p1818-d343471.html
   My bibliography  Save this article

Effects of Fiber and Copper Particles on Conductivity and Breakdown Characteristics of Natural Ester and Mineral Oil under DC Voltage

Author

Listed:
  • Lin Cheng

    (Nanjing NARI Group Corp., State Grid Electric Power Research Institute, Nanjing 211000, China
    Wuhan NARI Co Ltd., State Grid Electric Power Research Institute, Wuhan 430074, China)

  • Yi Jiang

    (Nanjing NARI Group Corp., State Grid Electric Power Research Institute, Nanjing 211000, China
    Wuhan NARI Co Ltd., State Grid Electric Power Research Institute, Wuhan 430074, China)

  • Min Dan

    (The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
    State Grid Chongqing Electric Power Co., Nan’an Power Supply Bureau, Chongqing 400000, China)

  • Hao Wen

    (Nanjing NARI Group Corp., State Grid Electric Power Research Institute, Nanjing 211000, China
    Wuhan NARI Co Ltd., State Grid Electric Power Research Institute, Wuhan 430074, China)

  • Yanqing Li

    (The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)

  • Wei Qin

    (The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)

  • Jian Hao

    (The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China)

Abstract

The converter transformer is a key equipment in high voltage direct current (HVDC) transmission system. Its oil-paper insulation system in the valve winding and outlet bushing experiences AC, DC, AC/DC, and transient impulse voltages simultaneously. The oil contamination problem is more serious under DC electric field. Therefore, it is significant to investigate the characteristic of particles motion and accumulation under DC electric field. In this paper, first, the movement and accumulation behavior of fiber particles and copper particles in mineral oil and natural ester were recorded and simulated. Then, the influence of fiber and copper particles on the oil conductivity was analyzed. Finally, the DC breakdown strength of mineral oil and natural ester with different particles concentration was compared. Results show that the movement speed of copper particles was larger than that of fiber particles. Fiber impurities were easy to form bridges in mineral oil, while there was no impurity bridge in natural ester. The current density of mineral oil containing particles is larger than that of the natural ester at the same testing time. The DC 50% probability breakdown voltages of oil samples containing fiber and copper particles decreased linearly with the increase of particle concentration, and the decrease rate of DC 50% probability breakdown voltages of oil containing copper particles were faster than that of oil containing fiber particles. Compared to pure mineral oil, the DC breakdown voltages corresponding to 50% probability of contaminated mineral oil showed a decrease from 11.9% to 22.5% when the fiber particle concentration increased from 0.001% to 0.012%. The DC 50% probability breakdown voltages of contaminated mineral oil with copper particles decreased from 23.8% to 45.0% when the particle concentration increased from 0.1 g/L to 1.5g/L. However, the decline range of the figures for natural ester contaminated by fiber or copper particles showed a smaller drop.

Suggested Citation

  • Lin Cheng & Yi Jiang & Min Dan & Hao Wen & Yanqing Li & Wei Qin & Jian Hao, 2020. "Effects of Fiber and Copper Particles on Conductivity and Breakdown Characteristics of Natural Ester and Mineral Oil under DC Voltage," Energies, MDPI, vol. 13(7), pages 1-16, April.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1818-:d:343471
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/13/7/1818/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/13/7/1818/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Min Dan & Jian Hao & Ruijin Liao & Lin Cheng & Jie Zhang & Fei Li, 2019. "Accumulation Behaviors of Different Particles and Effects on the Breakdown Properties of Mineral Oil under DC Voltage," Energies, MDPI, vol. 12(12), pages 1-15, June.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Sifeddine Abdi & Abderrahmane Manu Haddad & Noureddine Harid & Ahmed Boubakeur, 2022. "Modelling the Effect of Thermal Aging on Transformer Oil Electrical Characteristics Using a Regression Approach," Energies, MDPI, vol. 16(1), pages 1-12, December.
    2. Sifeddine Abdi & Noureddine Harid & Leila Safiddine & Ahmed Boubakeur & Abderrahmane (Manu) Haddad, 2021. "The Correlation of Transformer Oil Electrical Properties with Water Content Using a Regression Approach," Energies, MDPI, vol. 14(8), pages 1-14, April.

    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. Ioannis F. Gonos & Issouf Fofana, 2020. "Special Issue “Selected Papers from the 2018 IEEE International Conference on High Voltage Engineering (ICHVE 2018)”," Energies, MDPI, vol. 13(18), pages 1-5, September.

    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:13:y:2020:i:7:p:1818-:d:343471. 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.