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Analysis of Overvoltages Appearing in One-Sidedly Ungrounded MV Power Cable Screen

Author

Listed:
  • Aleksandra Schött-Szymczak

    (Faculty of Electrical Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

  • Krzysztof Walczak

    (Faculty of Electrical Engineering, Poznan University of Technology, 60-965 Poznan, Poland)

Abstract

Changing the connection type of a medium voltage (MV) cable screen is linked to a decrease in power loss, although it may also lead to the generation of overvoltage in a metallic cable screen, which is hazardous for proper cable line work. In this paper, results of simulation and field researches are presented, showing the range of voltages that occurs in cable screens during single-phase ground fault. There are considered to be three scenarios according to the applied type of cable screen connection. Conducted researches allow the comparison of chosen methods of simulation with an actual outcome. Results obtained during simulation and field studies lead to the conclusion that the range of overvoltage occurred in a cable screen could in fact be dangerous for the cable line’s sheath insulation without proper overvoltage protection.

Suggested Citation

  • Aleksandra Schött-Szymczak & Krzysztof Walczak, 2020. "Analysis of Overvoltages Appearing in One-Sidedly Ungrounded MV Power Cable Screen," Energies, MDPI, vol. 13(7), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1821-:d:343580
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    References listed on IDEAS

    as
    1. Krzysztof Lowczowski & Zbigniew Nadolny & Bartosz Olejnik, 2019. "Analysis of Cable Screen Currents for Diagnostics Purposes," Energies, MDPI, vol. 12(7), pages 1-17, April.
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    Cited by:

    1. Petar Sarajcev & Antun Meglic & Ranko Goic, 2021. "Lightning Overvoltage Protection of Step-Up Transformer Inside a Nacelle of Onshore New-Generation Wind Turbines," Energies, MDPI, vol. 14(2), pages 1-20, January.
    2. Aleksandra Schött-Szymczak & Krzysztof Walczak, 2021. "Impact of Cable Configuration on the Voltage Induced in Cable Screen during Work with One-Sidedly Ungrounded Cable Screen," Energies, MDPI, vol. 14(14), pages 1-14, July.
    3. Krzysztof Lowczowski & Jozef Lorenc & Andrzej Tomczewski & Zbigniew Nadolny & Jozef Zawodniak, 2020. "Monitoring of MV Cable Screens, Cable Joints and Earthing Systems Using Cable Screen Current Measurements," Energies, MDPI, vol. 13(13), pages 1-28, July.

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