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Evaluation of the Transient Overvoltages of HVDC Transmission Lines Caused by Lightning Strikes

Author

Listed:
  • Amr S. Zalhaf

    (School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
    Electrical Power and Machines Engineering Department, Tanta University, Tanta 31511, Egypt)

  • Ensheng Zhao

    (School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China)

  • Yang Han

    (School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China)

  • Ping Yang

    (School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China)

  • Abdulrazak H. Almaliki

    (Department of Civil Engineering, Faculty of Engineering, Taif University, Taif 21944, Saudi Arabia)

  • Reda M. H. Aly

    (Department of Civil Engineering, Faculty of Engineering, Taif University, Taif 21944, Saudi Arabia)

Abstract

High-voltage direct-current (HVDC) transmission systems are considered an outstanding solution due to high electrical losses emerging from long-distance transmission. However, HVDC transmission lines (TLs) are vulnerable to lightning strikes. In this work, the Yunnan-Guizhou 500 kV HVDC transmission system is used as a case study to evaluate the impact of lightning strikes on DC-TL overvoltages, as no research studies have been conducted to assess the lightning transient behavior of DC-TLs. A comprehensive investigation of the 500 kV DC-TL transient performance during lightning strikes is performed, taking into account different technical aspects that have not been studied in detail by previous researchers. Additionally, analysis of the back-flashover phenomenon has not been conducted well in previous work, and results on the effect of changing the lightning strike current peak and tower grounding resistance on shielding-failure flashover are quite limited. The distributed-parameter model is used to represent the DC-TL using the electromagnetic transients program (EMTP), considering real parameters of shielding wires and DC towers to study the lightning impact in the case of back-flashover and shielding-failure phenomena. Lightning strike is applied to the shielding wire, and the impact of increasing the peak value of lightning current is investigated on the back-flashover occurrence. Moreover, the influence of tower grounding resistance variation on the transient overvoltages across the tower body and back-flashover phenomenon is evaluated. From the simulation results, increasing the lightning current peak and grounding resistance results in higher overvoltages across the tower body, which increases the probability of back-flashover. Additionally, the shielding failure of the TL is assumed, and the variation impact of the lightning current peak and grounding resistance on shielding-failure flashover is investigated. The results show that the impact of the lightning current peak has a more significant impact than the grounding resistance in the case of shielding-failure flashover.

Suggested Citation

  • Amr S. Zalhaf & Ensheng Zhao & Yang Han & Ping Yang & Abdulrazak H. Almaliki & Reda M. H. Aly, 2022. "Evaluation of the Transient Overvoltages of HVDC Transmission Lines Caused by Lightning Strikes," Energies, MDPI, vol. 15(4), pages 1-20, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:4:p:1452-:d:751044
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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. Qiang Li & Qian Chen & Jiyang Wu & Youqiang Qiu & Changhong Zhang & Yilong Huang & Jianbao Guo & Bo Yang, 2023. "XGBoost-Based Intelligent Decision Making of HVDC System with Knowledge Graph," Energies, MDPI, vol. 16(5), pages 1-21, March.

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