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Electrical Treeing in Power Cable Insulation under Harmonics Superimposed on Unfiltered HVDC Voltages

Author

Listed:
  • Mehrtash Azizian Fard

    (Department of Engineering and Mathematics, Sheffield Hallam University, Sheffield S1 1WB, UK)

  • Mohamed Emad Farrag

    (Department of Engineering, Glasgow Caledonian University, Glasgow G4 0BA, UK
    Faculty of Industrial Education, Helwan University, 11795 Helwan, Egypt)

  • Alistair Reid

    (School of Engineering, Cardiff University, Cardiff CF10 3AT, UK)

  • Faris Al-Naemi

    (Department of Engineering and Mathematics, Sheffield Hallam University, Sheffield S1 1WB, UK)

Abstract

Insulation degradation is an irreversible phenomenon that can potentially lead to failure of power cable systems. This paper describes the results of an experimental investigation into the influence of direct current (DC) superimposed with harmonic voltages on both partial discharge (PD) activity and electrical tree (ET) phenomena within polymeric insulations. The test samples were prepared from a high voltage direct current (HVDC) cross linked polyethylene (XLPE) power cable. A double electrode arrangement was employed to produce divergent electric fields within the test samples that could possibly result in formation of electrical trees. The developed ETs were observed via an optical method and, at the same time, the emanating PD pulses were measured using conventional techniques. The results show a tenable relation between ETs, PD activities, and the level of harmonic voltages. An increase in harmonic levels has a marked effect on development of electrical trees as the firing angle increases, which also leads to higher activity of partial discharges. This study of the influencing operational parameters of HVDC converters on power cable insulation is predicted to contribute to enhancements in cable design and progressive advancement in condition monitoring and insulation diagnostic techniques that can lead to more effective asset management in HVDC systems.

Suggested Citation

  • Mehrtash Azizian Fard & Mohamed Emad Farrag & Alistair Reid & Faris Al-Naemi, 2019. "Electrical Treeing in Power Cable Insulation under Harmonics Superimposed on Unfiltered HVDC Voltages," Energies, MDPI, vol. 12(16), pages 1-15, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:16:p:3113-:d:257388
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    References listed on IDEAS

    as
    1. Mehrtash Azizian Fard & Mohamed Emad Farrag & Scott McMeekin & Alistair Reid, 2018. "Electrical Treeing in Cable Insulation under Different HVDC Operational Conditions," Energies, MDPI, vol. 11(9), pages 1-14, September.
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    Cited by:

    1. Marek Florkowski & Maciej Kuniewski & Paweł Zydroń, 2022. "Measurements and Analysis of Partial Discharges at HVDC Voltage with AC Components," Energies, MDPI, vol. 15(7), pages 1-11, March.
    2. Chengjie Zhang & Yuan Li & Senhong Yang & Ranran Li, 2023. "Study on Development Characteristics of Partial Discharge in Oil-Pressboard Insulation under Constant DC Voltage," Energies, MDPI, vol. 16(10), pages 1-14, May.
    3. Marek Florkowski, 2020. "Influence of Insulating Material Properties on Partial Discharges at DC Voltage," Energies, MDPI, vol. 13(17), pages 1-17, August.
    4. Mehmet Murat Ispirli & Özcan Kalenderli & Florian Seifert & Michael Rock & Bülent Oral, 2022. "The Effect of DC Voltage Pre-Stress on the Breakdown Voltage of Air under Composite DC and LI Voltage and Test Circuit: Design and Application," Energies, MDPI, vol. 15(4), pages 1-23, February.

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