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Electrical Treeing in Cable Insulation under Different HVDC Operational Conditions

Author

Listed:
  • Mehrtash Azizian Fard

    (School of Engineering, University of Aberdeen, Aberdeen AB24 3FX, UK)

  • Mohamed Emad Farrag

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

  • Scott McMeekin

    (Department of Engineering, Glasgow Caledonian University, Glasgow G4 0BA, UK)

  • Alistair Reid

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

Abstract

Electrical treeing (ET) can irreversibly deteriorate the insulation of polymeric power cables leading to a complete failure. This paper presents the results of an experimental investigation into the effects of unipolar and polarity reversing DC voltages on electrical tree (ET) and partial discharge (PD) behavior within high voltage direct current (HVDC) cross linked polyethylene (XLPE) cable insulation. A double needle configuration was adopted to produce non-uniform electric fields within the insulation samples, potentially leading to electrical trees. The development of trees was monitored through an optical method and the associated partial discharge signals were measured through an electrical detection technique, simultaneously. The analysis of the results shows reasonable relation between the formation of ETs and the type of the applied voltages. The polarity reversing attribute of the test voltages has a pronounced effect on formation and growth of electrical trees. This implicates an interaction between the space charges that accumulate within polymeric materials and the operational polarity reversing electric fields, which causes insulation degradation. Therefore, study of influencing HVDC operational parameters on insulation degradations can contribute to improvements in cable design and advancement in insulation diagnostic strategies applicable in HVDC systems leading to more effective asset management.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2406-:d:169207
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    Citations

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    Cited by:

    1. Antonino Imburgia & Pietro Romano & George Chen & Giuseppe Rizzo & Eleonora Riva Sanseverino & Fabio Viola & Guido Ala, 2019. "The Industrial Applicability of PEA Space Charge Measurements, for Performance Optimization of HVDC Power Cables," Energies, MDPI, vol. 12(21), pages 1-13, November.
    2. 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.
    3. Paweł Mikrut & Paweł Zydroń, 2023. "Numerical Modeling of PD Pulses Formation in a Gaseous Void Located in XLPE Insulation of a Loaded HVDC Cable," Energies, MDPI, vol. 16(17), pages 1-21, September.
    4. Xiaoming Zhang & Hui Yin, 2019. "A Monocular Vision-Based Framework for Power Cable Cross-Section Measurement," Energies, MDPI, vol. 12(15), pages 1-26, August.

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