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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A Fundamental Study on the Impulse Responses of Ground Rod Attendant upon Soil Discharges

토중방전을 수반하는 접지봉의 임펄스응답에 대한 기초적 연구

  • 유양우 (인하대학교 대학원 전기공학과) ;
  • 조성철 (인하대학교 대학원, 기초전력연구원 전력시험설비센터) ;
  • 이복희 (인하대학교 IT공대 전기공학과)
  • Received : 2014.01.20
  • Accepted : 2014.02.28
  • Published : 2014.04.30
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Abstract

This paper deals with the fundamental characteristics of transient and conventional ground impedances associated with soil discharges when the lightning impulse voltage was applied to a small-sized ground rod. The potential rise responses of the test ground rod to impulse currents were observed. The current-voltage (I-V)curves, transient and conventional ground impedance curves were examined.. To analyze the transient behaviors of ground rod attendant upon soil discharges, the impulse responses of ground rod were compared with those of non-inductive resistor. As a consequence, the potential rise and impedance of ground rod were reduced and the currents dispersed into the earth were increased due to soil discharges near the ground rod. Soil discharges are classified into two regimes; ionization and breakdown phenomena. The potential rise and impulse impedance of ground rod are significantly decreased by breakdown processes in soil.

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References

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