Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Soil Discharge Characteristics in Inhomogeneous Field Caused by Lightning Impulse Voltages

뇌임펄스전압에 의한 불평등전계에서 토양방전특성

  • Received : 2015.02.16
  • Accepted : 2015.03.11
  • Published : 2015.04.30
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Abstract

This paper presents experimental results about characteristics of soil discharge as a function of moisture content when the $1.2/50{\mu}s$ lightning impulse voltage is applied. The laboratory experiments, for this study, were carried out based on factors affecting the transient behavior in soils. The electrical breakdown in soils was measured over a 0-6% range of moisture content for sands and a 0-4% range of moisture content for gravels. Needle-plane electrode systems was used As a result, the conduction current prior to ionization growth in dry soil is a little, but it in wet soil is increased with the applied voltage because the wet soil particles act as conductors. The soil impedance curves show an abrupt reduction just after breakdown. The general tendency measured in different soils is that the higher the water content, the lower the breakdown voltage and the shorter the time-lag to breakdown.

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References

  1. I.F. Genos, I.A. Stathopulos, "Soil Ionization under Lightning Impulse Voltage", IEE Proc-Sci, Vol.151, pp.343-346, 2004.
  2. IEEE Std 80-2000, IEEE Guide for Safety in AC Substation Grounding, IEEE Inc, pp.49-63, 2000.
  3. Abdul M. Mousa, "The Soil Ionization Gradient associated with discharge of high currents into concentrated electrode", IEEE Trans, Vol. 9, No. 3, pp.1672, 1994.
  4. Z. Song, M. R. Raghuveer and J. He, "Model for prediction of characteristics of lightning breakdown channels in soil in the presence of a buried cable", IEE Proc. -Genere. Transm. Distrib., Vol.150, No.5, pp.623-628, Sep. 2003. https://doi.org/10.1049/ip-gtd:20030580
  5. N. Mohamad Nor, A. Haddad, and H. Griffiths, "Characterization of Ionization Phenomena in Soils under Fast Impulses", IEEE Trans. PD, Vol.21, No.1, pp.353-361, Jan. 2006.
  6. A. Phillip, "Guide for Transmission Line Grounding: A Roadmap for Design, Testing and Remediation; Part 1-Theory Book, EPRI Report, pp 4.1-4.13, 2006.
  7. I.F. Genos, I.A. Stathopulos, "Soil Ionization under Lightning Impulse Voltage", IEE Proc-Sci, Vol.151, pp.343-346, 2004.
  8. IEEE Std 80-2000, IEEE Guide for Safety in AC Substaion Grounding, IEEE Inc, pp.49-63, 2000.
  9. Abdul M. Mousa, "The Soil Ionization Gradient assosiated with discharge of high currents into concentrated electrode", IEEE Trans, Vol 9, No. 3, pp.1672, 1994.
  10. E. Kuffel, W. S. Xaengl and J. Kuffel, High Voltage Engineering - Fundamentals, 2nd ed., Butterworth - heinemann, pp.359-365, 2000.
  11. T. M. Flanagan, C. E. Mallon, R. Denson, and R. E. Leadon, "Electrical Breakdown Properties of Soil", IEEE Trans. Nuclear Science, Vol.NS-28, No.6, pp.4432-4439, Dec. 1981.
  12. IEC 60060-1, High-voltage test techniques - part 1 : General definition and test requirements, pp.14-22, 2001.
  13. S. Sekioka, M. I. Lorentzou, M. P. Philippakou, and J. M. Prousalidis, "Current-Dependent Grounding Resistance Model Based on Energy Balance of Soil Ionization", IEEE Trans. PD, Vol.21, No.1, pp.194-201, Jan. 2006.
  14. N. Mohamad Nor, A. Haddad, and H. Griffiths, "Performance of Earthing Systems of Low Resistivity Soils", IEEE Trans. PD, Vol.21, No.4, pp.2039-2047, Oct. 2006.