The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Analysis for the Grounding Impedance of Vertical Grounding Electrodes using the Distributed Parameter Circuit Model

분포정수회로모델을 이용한 수직 접지전극의 접지임피던스의 분석

  • 이복희 (인하대 IT공대 전기공학부) ;
  • 김종호 (인하대학교 대학원 전기공학과) ;
  • 최종혁 (인하대학교 대학원 전기공학과)
  • Received : 2010.02.09
  • Accepted : 2010.05.13
  • Published : 2010.06.01
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Abstract

A grounding electrode has the transient grounding impedance characteristics against lightning surges. So the performance of grounding electrodes should be evaluated as a grounding impedance as well as the ground resistance. The frequency-dependent grounding impedance is varied with the shape and size of grounding electrode and is divided into both inductive and capacitive behaviors. This paper presents a theoretical analysis for the grounding impedance determined by the size of grounding electrode using the distributed parameter circuit model. EMTP and Matlab programs were used in calculating the frequency-dependent grounding impedances of vertical grounding electrodes. It was found that the frequency-dependent grounding characteristics of vertical grounding electrodes are characterized by the distributed parameters which are changed in the dimension of grounding electrodes.

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References

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