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Assessment of Overvoltage and Insulation Coordination in Mixed HVDC Transmission Lines Exposed to Lightning Strikes

Author

Listed:
  • Mansoor Asif

    (Department of Electronic Engineering, Hanyang University, Hanyangdaehak-ro 55, Ansan 15588, Korea)

  • Ho-Yun Lee

    (Department of Electronic Engineering, Hanyang University, Hanyangdaehak-ro 55, Ansan 15588, Korea)

  • Kyu-Hoon Park

    (Department of Electronic Engineering, Hanyang University, Hanyangdaehak-ro 55, Ansan 15588, Korea)

  • Ayesha Shakeel

    (Department of Electronic Engineering, Hanyang University, Hanyangdaehak-ro 55, Ansan 15588, Korea)

  • Bang-Wook Lee

    (Department of Electronic Engineering, Hanyang University, Hanyangdaehak-ro 55, Ansan 15588, Korea)

Abstract

Many geographical constraints and aesthetic concerns necessitate the partial use of cable sections in the High Voltage DC (HVDC) transmission line, resulting in a mixed transmission line. The overhead sections of mixed lines are exposed to lightning strikes. The lightning strikes can not only result in flashover of overhead line (OHL) insulators but can enter the cable and permanently damage its insulation if adequate insulation coordination measures are not taken. In this work, we have analyzed the factors that affect the level of overvoltage inside the cable by simulating a fast front model in PSCAD. It has been determined that surge arresters must be provided at cable terminals when the length of cable sections is less than 16 km to limit the core-ground overvoltage within the lightning impulse protective level (LIPL). The level of sheath-ground overvoltage is independent of the length of cable; however, it can be limited within LIPL by lowering the sheath grounding impedance to 1.2 Ω. Insulation coordination measures do not impact the likelihood of OHL insulators’ flashover. The flashover performance of OHL can be improved by lowering the footing impedance of the second tower closest to the cable terminals, which is otherwise most likely to flashover.

Suggested Citation

  • Mansoor Asif & Ho-Yun Lee & Kyu-Hoon Park & Ayesha Shakeel & Bang-Wook Lee, 2019. "Assessment of Overvoltage and Insulation Coordination in Mixed HVDC Transmission Lines Exposed to Lightning Strikes," Energies, MDPI, vol. 12(21), pages 1-24, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:21:p:4217-:d:283865
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    References listed on IDEAS

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    1. Oscar Lennerhag & Jan Lundquist & Christiaan Engelbrecht & Tanumay Karmokar & Math H. J. Bollen, 2019. "An Improved Statistical Method for Calculating Lightning Overvoltages in HVDC Overhead Line/Cable Systems," Energies, MDPI, vol. 12(16), pages 1-17, August.
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    Cited by:

    1. Ayesha Shakeel & Kyu-Hoon Park & Koo-Yong Shin & Bang-wook Lee, 2021. "A Study of Fast Front Transients of an HVDC Mixed Transmission Line Exposed to Bipolar Lightning Strokes," Energies, MDPI, vol. 14(10), pages 1-16, May.
    2. Marek Florkowski & Jakub Furgał & Maciej Kuniewski, 2021. "Lightning Impulse Overvoltage Propagation in HVDC Meshed Grid," Energies, MDPI, vol. 14(11), pages 1-21, May.
    3. Rafał Tarko & Jakub Gajdzica & Wiesław Nowak & Waldemar Szpyra, 2021. "Study of the Lightning Overvoltage Protection Effectiveness of High Voltage Mixed Overhead Cable Power Lines," Energies, MDPI, vol. 14(8), pages 1-17, April.

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    1. Rafał Tarko & Jakub Gajdzica & Wiesław Nowak & Waldemar Szpyra, 2021. "Study of the Lightning Overvoltage Protection Effectiveness of High Voltage Mixed Overhead Cable Power Lines," Energies, MDPI, vol. 14(8), pages 1-17, April.
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