Journal of Electrical Engineering and Technology

  • 제4권1호
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  • Pages.98-105
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  • 2009
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  • 1975-0102(pISSN)
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  • 2093-7423(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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Analysis of Soil Ionization Behaviors under Impulse Currents

  • Lee, Bok-Hee (School of Electrical Engineering, Inha University) ;
  • Park, Geon-Hun (School of Electrical Engineering, Inha University) ;
  • Kim, Hoe-Gu (School of Electrical Engineering, Inha University) ;
  • Lee, Kyu-Sun (School of Electrical Engineering, Inha University)
  • 발행 : 2009.03.01
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초록

This paper presents the characteristics of soil ionization for different water contents, and the parameters associated with the dynamic properties of a simple model grounding system subject to lightning impulse currents. The laboratory experiments for this study were carried out based on factors affecting the soil resistivities. The soil resistivities are adjusted with water contents in the range from 2 to 8% by weight. A test cell with a spherical electrode buried in the middle of the hemispherical container was used. As a result, the electric field intensity $E_c$ initiating ionization is decreased with the reduction of soil resistivities. Also, as the water content increased, the pre-ionization resistance $R_1$ and the post-ionization resistance $R_2$ became lower with increasing current amplitude. The time-lag to ionization $t_1$ and the time-lag to the second current peak $t_2$ at high applied voltages were significantly shorter than those of low applied voltages. It was found that the soil ionization behaviors are highly dependent on the water content and the applied voltage amplitude.

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참고문헌

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피인용 문헌

  1. Electrical breakdown of soil under nonlinear pulsed current spreading vol.48, pp.28, 2015, https://doi.org/10.1088/0022-3727/48/28/285201
  2. Electric breakdown during the pulsed current spreading in the sand vol.42, pp.3, 2016, https://doi.org/10.1134/S1063780X16030077
  3. A Basic Study on the Attachment Process of Lightning Leader to Ground vol.28, pp.10, 2014, https://doi.org/10.5207/JIEIE.2014.28.10.082
  4. Methodologies for determination of soil ionization gradient vol.70, pp.5, 2012, https://doi.org/10.1016/j.elstat.2012.07.003
  5. A Fundamental Study on the Impulse Responses of Ground Rod Attendant upon Soil Discharges vol.28, pp.4, 2014, https://doi.org/10.5207/JIEIE.2014.28.4.062
  6. Protective Effect of Shield Wires Against Direct Lightning Flashes to Buried Cables vol.33, pp.4, 2018, https://doi.org/10.1109/TPWRD.2017.2746100