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Review of Research Progress on the Electrical Properties and Modification of Mineral Insulating Oils Used in Power Transformers

Author

Listed:
  • Xiaobo Wang

    (College of Engineering and Technology, Southwest University, Chongqing 400715, China)

  • Chao Tang

    (College of Engineering and Technology, Southwest University, Chongqing 400715, China)

  • Bo Huang

    (School of Electronics and Computer Science, University of Southampton, Highfield Campus, Southampton SO17 1BJ, UK)

  • Jian Hao

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

  • George Chen

    (School of Electronics and Computer Science, University of Southampton, Highfield Campus, Southampton SO17 1BJ, UK)

Abstract

In November 2017, the first ±1100 kV high-voltage direct-current power transformer in the world, which was made by Siemens in Nurnberg, passed its type test. Meanwhile, in early 2017, a ±1000 kV ultra-high voltage (UHV) substation was officially put into operation in Tianjin, China. These examples illustrate that the era of UHV power transmission is coming. With the rapid increase in power transmission voltage, the performance requirements for the insulation of power transformers are getting higher and higher. The traditional mineral oils used inside power transformers as insulating and cooling agents are thus facing a serious challenge to meet these requirements. In this review, the basic properties of traditional mineral insulating oil are first introduced. Then, the variation of electrical properties such as breakdown strength, permittivity, and conductivity during transformer operation and aging is summarized. Next, the modification of mineral insulating oil is investigated with a focus on the influence of nanoparticles on the electrical properties of nano-modified insulating oil. Recent studies on the performance of mineral oil at molecular and atomic levels by molecular dynamics simulations are then described. Finally, future research hotspots and notable research topics are discussed.

Suggested Citation

  • Xiaobo Wang & Chao Tang & Bo Huang & Jian Hao & George Chen, 2018. "Review of Research Progress on the Electrical Properties and Modification of Mineral Insulating Oils Used in Power Transformers," Energies, MDPI, vol. 11(3), pages 1-31, February.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:487-:d:133299
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    Citations

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    Cited by:

    1. Ali A. Radwan & Ahmed A. Zaki Diab & Abo-Hashima M. Elsayed & Yehya S. Mohamed & Hassan Haes Alhelou & Pierluigi Siano, 2021. "Transformers Improvement and Environment Conservation by Using Synthetic Esters in Egypt," Energies, MDPI, vol. 14(7), pages 1-15, April.
    2. Maciej Zdanowski, 2020. "Electrostatic Charging Tendency Analysis Concerning Retrofilling Power Transformers with Envirotemp FR3 Natural Ester," Energies, MDPI, vol. 13(17), pages 1-11, August.
    3. Piotr Przybylek & Hubert Moranda & Hanna Moscicka-Grzesiak & Dominika Szczesniak, 2019. "Application of Synthetic Ester for Drying Distribution Transformer Insulation—The Influence of Cellulose Thickness on Drying Efficiency," Energies, MDPI, vol. 12(20), pages 1-16, October.
    4. Kakou D. Kouassi & Issouf Fofana & Ladji Cissé & Yazid Hadjadj & Kouba M. Lucia Yapi & K. Ambroise Diby, 2018. "Impact of Low Molecular Weight Acids on Oil Impregnated Paper Insulation Degradation," Energies, MDPI, vol. 11(6), pages 1-13, June.
    5. Maciej Zdanowski, 2020. "Streaming Electrification of Nycodiel 1255 Synthetic Ester and Trafo EN Mineral Oil Mixtures by Using Rotating Disc Method," Energies, MDPI, vol. 13(23), pages 1-14, November.
    6. Michal Rajnak & Zan Wu & Bystrik Dolnik & Katarina Paulovicova & Jana Tothova & Roman Cimbala & Juraj Kurimský & Peter Kopcansky & Bengt Sunden & Lars Wadsö & Milan Timko, 2019. "Magnetic Field Effect on Thermal, Dielectric, and Viscous Properties of a Transformer Oil-Based Magnetic Nanofluid," Energies, MDPI, vol. 12(23), pages 1-11, November.
    7. Issouf Fofana & U. Mohan Rao, 2018. "Engineering Dielectric Liquid Applications," Energies, MDPI, vol. 11(10), pages 1-4, October.
    8. Fabio Henrique Pereira & Francisco Elânio Bezerra & Shigueru Junior & Josemir Santos & Ivan Chabu & Gilberto Francisco Martha de Souza & Fábio Micerino & Silvio Ikuyo Nabeta, 2018. "Nonlinear Autoregressive Neural Network Models for Prediction of Transformer Oil-Dissolved Gas Concentrations," Energies, MDPI, vol. 11(7), pages 1-12, June.
    9. Leila Safiddine & Hadj-Ziane Zafour & Ungarala Mohan Rao & Issouf Fofana, 2019. "Regeneration of Transformer Insulating Fluids Using Membrane Separation Technology," Energies, MDPI, vol. 12(3), pages 1-13, January.
    10. Stephanie Azlyn Anak Felix & Muhamad Faiz Md Din & Asnor Mazuan Ishak & Jianli Wang & Nurul Hayati Idris & Wan Fathul Hakim Wan Zamri, 2023. "Investigation of the Electrical Properties of Mineral Oils with and without Carbon Nanotube Concentration under Different Magnetic Fields Applied in Transformer Applications," Energies, MDPI, vol. 16(8), pages 1-15, April.
    11. Teresa Nogueira & José Carvalho & José Magano, 2022. "Eco-Friendly Ester Fluid for Power Transformers versus Mineral Oil: Design Considerations," Energies, MDPI, vol. 15(15), pages 1-18, July.
    12. 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.
    13. Maciej Zdanowski, 2022. "Streaming Electrification of C 60 Fullerene Doped Insulating Liquids for Power Transformers Applications," Energies, MDPI, vol. 15(7), pages 1-14, March.
    14. Bo Gao & Rui Yu & Guangcai Hu & Cheng Liu & Xin Zhuang & Peng Zhou, 2019. "Development Processes of Surface Trucking and Partial Discharge of Pressboards Immersed in Mineral Oil: Effect of Tip Curvatures," Energies, MDPI, vol. 12(3), pages 1-14, February.
    15. Issouf Fofana & Bo Zhang, 2022. "High-Voltage Engineering and Applications in Our Modern Society," Energies, MDPI, vol. 15(22), pages 1-4, November.
    16. Piotr Przybylek, 2018. "A New Concept of Applying Methanol to Dry Cellulose Insulation at the Stage of Manufacturing a Transformer," Energies, MDPI, vol. 11(7), pages 1-13, June.

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