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Partial Discharge Measurements in a High Voltage Gas Insulated Transmission Line Insulated with CO 2

Author

Listed:
  • Phillip Widger

    (School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA, UK)

  • Daniel Carr

    (School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA, UK)

  • Alistair Reid

    (School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA, UK)

  • Meirion Hills

    (School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA, UK)

  • Chris Stone

    (School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA, UK)

  • A. (Manu) Haddad

    (School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA, UK)

Abstract

This paper uses practical experimentation to analyse the effect of replacing SF 6 with pure CO 2 in conventional gas insulated transmission line sections by studying partial discharge measurements taken with applied voltages up to 242 kV (rms). The results can also help in understanding the properties of new alternative gas mixtures which can be utilised with a ratio of up to and over 95% CO 2 . The experiments undertaken involved filling a gas insulated line demonstrator with 3 bars of CO 2 and applying voltages up to 242 kV in both clean conditions and particle-contaminated enclosure conditions. The results demonstrate that CO 2 can be used to insulate gas equipment without breakdown at high voltage, however, a higher gas-filling pressure may be needed to reduce the partial discharge found in the tests presented in this paper. Another aspect of the work showed that partial discharge (PD) measurements from internal ultra-high frequency (UHF) sensors compared with a direct measurement from a capacitive divider both clearly showed the effect of contaminating particles in CO 2 . However, the PD divider measurements also showed considerable external PD on the outside of the gas compartment, leading to the conclusion that UHF sensors are still regarded as having the highest sensitivity and noise immunity for gas insulated switchgear (GIS) or gas insulated transmission line (GIL) systems including when the equipment is insulated with CO 2 .

Suggested Citation

  • Phillip Widger & Daniel Carr & Alistair Reid & Meirion Hills & Chris Stone & A. (Manu) Haddad, 2020. "Partial Discharge Measurements in a High Voltage Gas Insulated Transmission Line Insulated with CO 2," Energies, MDPI, vol. 13(11), pages 1-11, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:11:p:2891-:d:367899
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    References listed on IDEAS

    as
    1. Abderrahmane Beroual & Abderrahmane (Manu) Haddad, 2017. "Recent Advances in the Quest for a New Insulation Gas with a Low Impact on the Environment to Replace Sulfur Hexafluoride (SF 6 ) Gas in High-Voltage Power Network Applications," Energies, MDPI, vol. 10(8), pages 1-20, August.
    2. Phillip Widger & Abderrahmane (Manu) Haddad, 2018. "Evaluation of SF 6 Leakage from Gas Insulated Equipment on Electricity Networks in Great Britain," Energies, MDPI, vol. 11(8), pages 1-14, August.
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    Cited by:

    1. Lise Donzel & Martin Seeger & Daniel Over & Jan Carstensen, 2022. "Metallic Particle Motion and Breakdown at AC Voltages in CO 2 /O 2 and SF 6," Energies, MDPI, vol. 15(8), pages 1-17, April.

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