Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Design and Implementation of Wideband Grounding Impedance Measurement Device using IQ Demodulation Method

IQ 복조 기법을 이용한 광대역 접지 임피던스 측정기의 설계 및 구현

  • 김영진 (창원대학교 메카트로닉스대학 전기전자제어공학부) ;
  • 길형준 (전기안전연구원) ;
  • 김성주 (창원대학교 메카트로닉스대학 전기전자제어공학부) ;
  • 김재형 (창원대학교 메카트로닉스대학 전기전자제어공학부)
  • Received : 2016.08.04
  • Accepted : 2016.11.02
  • Published : 2016.12.31
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Abstract

One of key parameters on lightning protection system design of electric, information and communication system is grounding impedance. Earth impedance includes numerous information about earthing performance of grounding system. This paper suggests grounding impedance measuring device which is comprised of wideband current source, voltage and current measuring components. We used IQ Demodulation to measure more accurate phase difference of voltage and current. The range of frequency is up to 1 MHz that is IEEE defined as the range of lightning surge. We compared developed grounding impedance measuring device with existing one to test its performance, and we used grounding system while we implemented measurement and analysing by using fall of potential method IEEE Std.81 proposed.

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References

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