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

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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The transient grounding impedance measurment of large grid grounding electrodes

대규모 그리드 접지전극의 과도접지임피던스의 측정

  • 전병욱 (인하대학교 IT 공과대학 전기공학부) ;
  • 이수봉 (인하대학교 IT 공과대학 전기공학부) ;
  • 이봉 (인하대학교 IT 공과대학 전기공학부) ;
  • 이승주 (인하대학교 IT 공과대학 전기공학부) ;
  • 정동철 (인하대학교 IT 공과대학 전기공학부) ;
  • 이복희 (인하대학교 IT 공과대학 전기공학부)
  • Published : 2008.10.17
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Abstract

This paper presents the transient and conventional grounding impedance behaviors of large grid grounding system associated with the injection point of impulse current The measurement methods consider two possible errors in the grounding-system impedances: (1) ground mutual resistance due to current flow through ground from the ground electrode to be measured to the current auxiliary, (2) ac mutual coupling between the current test lead and the potential test lead The test circuit was set to reduce the error factors. The transient grounding impedance depends on the rise time and injection point of impulse current It is effective that grounding conductor is connected to the center of the large grid grounding system.

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