The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Effects of Maximum Probe Spacing of Soil Resistivity Survery on Substation Grounding Analysis

변전소 접지설계를 위한 대지저항율 측정시 전극간 최대간격이 접지해석에 미치는 영향

  • 정길조 (전력연구원 송배전기술그룹) ;
  • 곽희로 (숭실대 전기공학과) ;
  • 최종기 (전력연구원 전력계통연구실)
  • Published : 2001.08.01
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Abstract

Presently, typical maximum probe spacing of soil resistivity survey(Wenners 4 pin method) is 20 m in case of 154 K substation grounding design of KEPCO. This paper examined the effects of maximum probe spacing of wenner method on the equivalent soil modeling and the accuracy of grounding resistance measurement by comparing the calculated FOP(Fall-of-Potential) curves of various soil models with the measured one at 154kV H substation. The comparison results showed that the inaccurate estimation of deep soil resistivity, which is caused from the short probe spacing of soil resistivity survey, can produce large errors on measurement of grounding resistance. In this paper a quantitative analysis of FOP at H substation has been presented.

Keywords

References

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