한국조명전기설비학회:학술대회논문집 (Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference)

한국조명전기설비학회 (The Korean Institute of IIIuminating and Electrical Installation Engineers)
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전위강하법에 의한 접지임피던스 측정 시 오차요인 분석

Analysis of error factors of the Fall-of-potential test method in measurements of grounding impedance

  • 전병욱 (인하대학교 IT 공과대학 전기공학부) ;
  • 이수봉 (인하대학교 IT 공과대학 전기공학부) ;
  • 정동철 (인하대학교 IT 공과대학 전기공학부) ;
  • 이복희 (인하대학교 IT 공과대학 전기공학부) ;
  • 안창환 (인하공업전문대학)
  • 발행 : 2008.05.08
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초록

This paper presents the error factors of Fall-of-potential test method used in measurements of the grounding-system impedance. This test methods inherently can introduce two possible errors in the measurements of grounding-system impedance: (1) ground mutual resistance due to current flow through ground from the ground electrode to the current probe, (2) ac mutual coupling between the current test lead and the potential test lead. The errors of ground mutual resistances and ac mutual coupling are expressed by the equation in calculating grounding impedance. These equations were calculated by Matlab that is commercial tool using mathematical calculation. The results of calculation were applied to correct grounding impedance.

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