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

  • 제28권5호
  • /
  • Pages.98-105
  • /
  • 2014
  • /
  • 1229-4691(pISSN)
  • /
  • 2287-5034(eISSN)
한국조명전기설비학회 (The Korean Institute of IIIuminating and Electrical Installation Engineers)
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침상 접지봉의 임펄스접지임피던스에 미치는 지중방전의 영향

Effects of Soil Discharges on the Impulsive Ground Impedance of Ground Rod with Needles

  • 유양우 (인하대학교 대학원 전기공학과) ;
  • 조성철 (인하대 대학원, 기초전력연구원 전력시험설비센터) ;
  • 이복희 (인하대학교 IT공대 전기공학과)
  • 투고 : 2014.02.28
  • 심사 : 2014.04.09
  • 발행 : 2014.05.31
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초록

Soil discharges near the ground rod play an important role to reduce the ground potential rise and the ground impedance and to help the fault current to spread into the earth. This paper presents the effects of soil discharges on the transient and conventional ground impedances when the lightning impulse voltage was applied to a ground rod with radial needles. The current-voltage (I-V)curves and transient ground impedance curves were calculated based on the measured current and potential traces. Soil discharge behaviors related to I-V curves and transient ground impedance curves were analyzed as a function of the magnitude of lightning impulse voltages. As a result, the soil discharges occurred near the ground electrode contribute to the reduction of conventional ground impedance and limits the ground potential rise effectively under lightning impulse voltages.

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참고문헌

  1. B. H. Lee, G. H. Park, H. G. Kim, K. S. Lee, "Analysis of Soil Ionization Behaviors under Impulse Currents", JEET, Vol. 4, pp.98-105, 2009.
  2. B. H. Lee, K. S. Lee and H. G. Kim, "Breakdown Characteristics of Siols Caused by Impulse Currents", J. KIIEE, Vol. 24, No. 4, pp.103-109, 2010.
  3. I. F. Genos, I.A. Stathopulos, "Soil Ionization under Lightning Impulse Voltages," IEE Proc.-Sci, Vol.151, pp.343-346, 2004.
  4. T. K. Manna and P. Chowdhuri, "Generalized equation of soil critical electric field based on impulse tests and measured soil electrical parameters", IEE Proc. Gener. Transm. Distrib., Vol.154, pp.811-817, 2007.
  5. N. Mohamad Nor, A. Haddad and H. Griffiths, "Characterization of Ionization Phenomena in Soils Under Fast Impulses", IEEE Trans. PD, Vol.21, pp.353-361, 2006.
  6. H. G. Kim, G. H. Park and B. H. Lee, "Analysis of Soil Ionization Characteristics in Concentric Cylindrical Electrode System under Impulse Voltages" J. KIIEE, Vol. 22, No. 9, pp.32-39, 2008.
  7. IEEE Std 81.2-1991, IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding Systems, IEEE Inc, pp.9-19, 1991.
  8. J. H. Choi and B. H. Lee, "An anlysis of conventional grounding impedance based on the impulsive current distribution of a horizontal electrode", Electric Power Systems Research, Vol.85, pp.30-37, 2012. https://doi.org/10.1016/j.epsr.2011.07.005
  9. Y. W. Yoo, J. H. Eom, S. C. Cho, T. H. Lee, and B. H. Lee, "Characteristic Analysis of Transient Impedances of Small-sized Ground Electrodes in an Ionization Region of Soil", J. KIIEE, Vol.23, No.6, pp.78-84, 2009.
  10. Y. W. Yoo, S. C. Cho and B. H. Lee, "Ionization Characteristics of a Ground Rod with Radial Needles under Lightning Impulse", Proc. 5th Asia Lightning Protection Forum, pp.187-190, 2008.
  11. A. Geri, "Behaviour of Grounding Systems Excited by High Impulse Currents: the Model and Its Validation", IEEE Trans. on PD, Vol.14, No.3, pp.1008-1017, 1999.
  12. A.M. Mousa, "The Soil Ionization Gradient Associated with Discharge of High Currents into Concentrated Electrodes", IEEE Trans. on PD, Vol.9, No.3, pp.1669-1677, 1994.
  13. S. B. Lee B. Li, S. J. Lee, B. W. Jeon, and B. H. Lee, "Transient Grounding Impedance Behaviors of Deeply-driven Ground Rods According to the Injection Point of Impulse Currents" J. KIIEE, Vol. 22, No. 9, pp. 62-68, 2008. https://doi.org/10.5207/JIEIE.2008.22.10.062
  14. S. Visacro and G. Rosado, "Response of Grounding Electrodes to Impulse Currents: An Experimental Evaluation" IEEE Trans. on EMC, Vol. 51, No.1, pp.161-164, 2009.