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Characteristics of Negative Streamer Development in Ester Liquids and Mineral Oil in a Point-To-Sphere Electrode System with a Pressboard Barrier

Author

Listed:
  • Pawel Rozga

    (Institute of Electrical Engineering, Lodz University of Technology, Łódź 90-924, Poland)

  • Marcin Stanek

    (Institute of Electrical Engineering, Lodz University of Technology, Łódź 90-924, Poland)

  • Bartlomiej Pasternak

    (Institute of Electrical Engineering, Lodz University of Technology, Łódź 90-924, Poland)

Abstract

This article presents the results of the studies on negative streamer propagation in a point-to-sphere electrode system with a pressboard barrier placed between them. The proposed electrode system gave the opportunity to assess the influence of the insulating barrier on streamer development in the conditions close to the actual transformer insulating system where the liquid gap is typically divided in parts by using pressboard barriers. The studies were performed for five commercial dielectric liquids. Among them two were biodegradable synthetic esters and two were biodegradable natural esters. Mineral oil, as the fifth liquid, was used for comparison. The measurements were based on electrical and optical experimental techniques. From the results obtained it may be concluded that, independently of the liquids tested, the electrical strength of the insulating system considered was increased by about 50%. In the case of streamer development assessed using photomultiplier-based light registration it is not possible to indicate clearly which of the liquids tested is better under the conditions of the experiment. In all cases streamers always developed slowly (2nd mode) at all voltage levels applied during the studies. In turn, the intensity of the discharge processes, comparing the same voltage levels, was mostly higher when streamers developed in ester liquids, however, the differences noticed were minimal.

Suggested Citation

  • Pawel Rozga & Marcin Stanek & Bartlomiej Pasternak, 2018. "Characteristics of Negative Streamer Development in Ester Liquids and Mineral Oil in a Point-To-Sphere Electrode System with a Pressboard Barrier," Energies, MDPI, vol. 11(5), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:5:p:1088-:d:143731
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    References listed on IDEAS

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    1. Kapila Bandara & Chandima Ekanayake & Tapan Saha & Hui Ma, 2016. "Performance of Natural Ester as a Transformer Oil in Moisture-Rich Environments," Energies, MDPI, vol. 9(4), pages 1-13, March.
    2. Abderrahmane Beroual & Usama Khaled & Phanuel Seraphine Mbolo Noah & Henry Sitorus, 2017. "Comparative Study of Breakdown Voltage of Mineral, Synthetic and Natural Oils and Based Mineral Oil Mixtures under AC and DC Voltages," Energies, MDPI, vol. 10(4), pages 1-17, April.
    3. Pawel Rozga, 2016. "Streamer Propagation and Breakdown in a Very Small Point-Insulating Plate Gap in Mineral Oil and Ester Liquids at Positive Lightning Impulse Voltage," Energies, MDPI, vol. 9(6), pages 1-12, June.
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    Cited by:

    1. Fatih Atalar & Aysel Ersoy & Pawel Rozga, 2022. "Investigation of Effects of Different High Voltage Types on Dielectric Strength of Insulating Liquids," Energies, MDPI, vol. 15(21), pages 1-25, October.
    2. Issouf Fofana & U. Mohan Rao, 2018. "Engineering Dielectric Liquid Applications," Energies, MDPI, vol. 11(10), pages 1-4, October.
    3. Zbigniew Nadolny & Grzegorz Dombek, 2018. "Electro-Insulating Nanofluids Based on Synthetic Ester and TiO 2 or C 60 Nanoparticles in Power Transformer," Energies, MDPI, vol. 11(8), pages 1-11, July.
    4. Shen, Zijia & Wang, Feipeng & Wang, Zhiqing & Li, Jian, 2021. "A critical review of plant-based insulating fluids for transformer: 30-year development," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    5. Wojciech Sikorski, 2018. "Active Dielectric Window: A New Concept of Combined Acoustic Emission and Electromagnetic Partial Discharge Detector for Power Transformers," Energies, MDPI, vol. 12(1), pages 1-27, December.

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