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Analysis of the Influence of the Insulation Parameters of Medium Voltage Electrical Networks and of the Petersen Coil on the Single-Phase-to-Ground Fault Current

Author

Listed:
  • Dumitru Toader

    (Department Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, Romania)

  • Marian Greconici

    (Department Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, Romania)

  • Daniela Vesa

    (Department Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, Romania)

  • Maria Vintan

    (Department Computer Science and Electrical Engineering, Lucian Blaga University, 550024 Sibiu, Romania)

  • Claudiu Solea

    (Department Fundamental of Physics for Engineer, Politehnica University, 300006 Timisoara, Romania)

Abstract

Settings of protection are essential to ensure the sensitivity and selectivity needed to detect defects. Making the correct settings requires the calculation of the fault currents with as little error as possible. Fault currents are influenced by the parameters of the electrical networks, including the state of the insulation and the Petersen coil, which changes during their operation electrical networks. This paper analyzes how the insulation parameters of medium voltage power lines, the parameters of the Petersen coil used to treat the neutral of the medium voltage electrical network and the value of the resistance at the fault location influence the fault current in the case of a single-phase fault. The large number of single-phase faults that occur in medium voltage electrical networks justifies this analysis. The symmetrical components method was used to calculate the fault current. The results obtained by calculation were verified experimentally by causing a single-phase-to-ground fault in a real medium voltage network. The paper presents the situations in which the analytical calculation of the single-phase-to-ground fault current can lead to inadmissibly large errors, even over 50%, but also the situations in which the errors fall below 3%.

Suggested Citation

  • Dumitru Toader & Marian Greconici & Daniela Vesa & Maria Vintan & Claudiu Solea, 2021. "Analysis of the Influence of the Insulation Parameters of Medium Voltage Electrical Networks and of the Petersen Coil on the Single-Phase-to-Ground Fault Current," Energies, MDPI, vol. 14(5), pages 1-15, March.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:5:p:1330-:d:508206
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    References listed on IDEAS

    as
    1. Tao Tang & Chun Huang & Zhenxing Li & Xiuguang Yuan, 2019. "Identifying Faulty Feeder for Single-Phase High Impedance Fault in Resonant Grounding Distribution System," Energies, MDPI, vol. 12(4), pages 1-15, February.
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    Cited by:

    1. Dumitru Toader & Maria Vintan & Claudiu Solea & Daniela Vesa & Marian Greconici, 2021. "Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral," Energies, MDPI, vol. 14(21), pages 1-19, October.
    2. Krzysztof Kuliński & Adam Heyduk, 2024. "Ground Fault in Medium-Voltage Power Networks with an Isolated Neutral Point: Spectral and Wavelet Analysis of Selected Cases in an Example Industrial Network Modeled in the ATP-EMTP Package," Energies, MDPI, vol. 17(7), pages 1-25, March.
    3. Dumitru Toader & Maria Vintan, 2023. "Mathematical Models of the Phase Voltages of High-, Medium- and Low-Voltage Busbars in a Substation during a Phase-to-Ground Fault on High-Voltage Busbars," Mathematics, MDPI, vol. 11(13), pages 1-30, July.
    4. Yaojing Tang & Yongle Chang & Jinrui Tang & Bin Xu & Mingkang Ye & Hongbo Yang, 2021. "A Novel Faulty Phase Selection Method for Single-Phase-to-Ground Fault in Distribution System Based on Transient Current Similarity Measurement," Energies, MDPI, vol. 14(15), pages 1-19, August.
    5. Denis Ustinov & Aleksander Nazarychev & Denis Pelenev & Kirill Babyr & Andrey Pugachev, 2023. "Investigation of the Effect of Current Protections in Conditions of Single-Phase Ground Fault through Transient Resistance in the Electrical Networks of Mining Enterprises," Energies, MDPI, vol. 16(9), pages 1-15, April.

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