Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Design and Fabrication of a Surge Impedance Meter

서지임피던스 측정기의 설계 및 제작

  • 길경석 (한국해양대학교 전기전자공학부) ;
  • 류길수 (한국해양대학교 IT공학부) ;
  • 김일권 (한국해양대학교 전기전자공학부) ;
  • 문병두 (한국해양대학교 전기전자공학부) ;
  • 김황국 (한국해양대학교 전기전자공학부) ;
  • 박찬용 (한국해양대학교 전기전자공학부)
  • Published : 2007.12.31

Abstract

Ground systems flow fault currents into the ground, and suppress Ground Potential Rise (GPR) by the current. In this paper, we designed and fabricated a surge impedance meter to analyze the ground impedance in wide frequency ranges. The meter consists of a surge generator, a high speed sample/hold (S/H) circuit and an associated electronics. The surge generator produces surge voltage up to 5kV in ranges of $50\sim500ns$. Field tests were carried out to evaluate the surge impedance meter at a driven-rod ground system. The results showed that surge impedance of ground systems should be measured by various fast surge waveforms, since the impedance increases as the rise time of applied voltage increases.

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