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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Calculation of Electric Potential Rise of Horizontal Grounding Electrode Caused by Lightning Stroke Currents

뇌격전류에 의한 수평접지극의 전위상승 계산

  • Lee, Bok-Hee (School of Electrical Engineering, Inha University) ;
  • Cho, Sung-Chul (Korea Electrical Engineering & Science Research Institute)
  • Received : 2013.09.09
  • Accepted : 2013.10.19
  • Published : 2013.12.31
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Abstract

An electric potential rise of the grounding electrode developed by the lightning stroke currents should be calculated for the purpose of effective protection of electrical and electronic equipment. In this paper, the electromagnetic model was applied to calculate the harmonic impedance of grounding electrode. Also the empirical equation related to the permittivity and resistivity of soil was used. The lightning current waveforms, which are expressed by the Heidler's equation, were used in order to calculate accurately transient electric potential rises. The transient voltage was obtained by using the simulated harmonic impedance and the lightning current in frequency domain. Finally, the transient voltages of horizontal grounding electrode(10m) under lightning stroke currents were calculated by IFFT(Inverse Fast Fourier Transform).

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References

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