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The Impact of Transmission Line Modeling on Lightning Overvoltage

Author

Listed:
  • Jaimis Sajid Leon Colqui

    (School of Electrical and Computer Engineering, State University of Campinas—UNICAMP, Campinas 13083-852, Brazil)

  • Rodolfo Antônio Ribeiro de Moura

    (Electrical Engineering Department, Federal University of São João del-Rei—UFSJ, São João del-Rei 36307-352, Brazil)

  • Marco Aurélio De Oliveira Schroeder

    (Electrical Engineering Department, Federal University of São João del-Rei—UFSJ, São João del-Rei 36307-352, Brazil)

  • José Pissolato Filho

    (School of Electrical and Computer Engineering, State University of Campinas—UNICAMP, Campinas 13083-852, Brazil)

  • Sérgio Kurokawa

    (Department of Electrical Engineering, São Paulo State University—UNESP, Ilha Solteira 15385-000, Brazil)

Abstract

In most of the work that investigates the backflashover phenomenon due to direct lightning strikes, using EMT-type simulators, transmission lines are represented by the J. Marti model and the ground effect is computed employing J. R. Carson’s formulations. Thus, the ground displacement current is neglected, the line voltage definition corresponds to the wire potential formulation, and soil resistivity is considered frequency-independent. These considerations can lead to erroneous measurements of the occurrences of the backflashover phenomenon in the insulator strings of transmission line. In this sense, this paper presents a systematic sensitivity analysis study of lightning overvoltage in insulator strings considering more physically consistent models of the transmission line, which consider the displacement current, ground admittance correction, rigorous voltage definition, and frequency-dependent soil parameters. According to the results, for the case study, transmission line parameters modeling can present a maximum percentual difference of around 71.54%, considering the frequency range of first strokes. This difference leads to a percent difference of around 5.25% in the maximum overvoltage across the insulator strings. These differences confirm that the occurrence or not of backflashover in the insulator strings, including the disruption time, are sensitive to the line model considered.

Suggested Citation

  • Jaimis Sajid Leon Colqui & Rodolfo Antônio Ribeiro de Moura & Marco Aurélio De Oliveira Schroeder & José Pissolato Filho & Sérgio Kurokawa, 2023. "The Impact of Transmission Line Modeling on Lightning Overvoltage," Energies, MDPI, vol. 16(3), pages 1-19, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:3:p:1343-:d:1048187
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    References listed on IDEAS

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    1. Tainá Fernanda Garbelim Pascoalato & Anderson Ricardo Justo de Araújo & Pablo Torrez Caballero & Jaimis Sajid Leon Colqui & Sérgio Kurokawa, 2021. "Transient Analysis of Multiphase Transmission Lines Located above Frequency-Dependent Soils," Energies, MDPI, vol. 14(17), pages 1-26, August.
    2. Theofilos A. Papadopoulos & Andreas I. Chrysochos & Christos K. Traianos & Grigoris Papagiannis, 2020. "Closed-Form Expressions for the Analysis of Wave Propagation in Overhead Distribution Lines," Energies, MDPI, vol. 13(17), pages 1-29, September.
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    Cited by:

    1. Andriy Chaban & Andrzej Popenda & Andrzej Szafraniec & Vitaliy Levoniuk, 2023. "Including Shield Wires in the Analysis of Transient Processes Occurring in HVAC Transmission Lines," Energies, MDPI, vol. 16(23), pages 1-20, December.

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