Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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An Evaluation of Induced Voltage according to the Grounding Resistance of a 22.9 kV-Y Distribution Line Simulated for its Field Application for Lightning Prevention

낙뢰 예방 배전선로의 현장 적용을 위해 모의된 22.9 kV-Y의 접지저항에 따른 유도전압의 평가

  • Kim, Jeom-Sik (Department of Fire Safety Engineering, Jeonju University) ;
  • Choi, Chung-Seog (Department of Fire Safety Engineering, Jeonju University)
  • 김점식 (전주대학교 소방안전공학과) ;
  • 최충석 (전주대학교 소방안전공학과)
  • Received : 2015.08.20
  • Accepted : 2015.09.23
  • Published : 2015.10.31
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Abstract

This study performed simulation tests to prevent induced lightning that occurs to a 22.9 kV-Y distribution line. A simulated distribution line reduced to 1/50 of an actual distribution line was installed to measure the induced voltage according to the change in grounding resistance. It was found that the induced voltage increased as the grounding resistance increased but that the range of its increase was small. This study examined the reliability of the proposed lightning preventive distribution line using the Minitab program (Minitab 17). When a grounding resistance of $300{\Omega}$ was maintained for each electric pole, the Anderson Darling (AD) was 0.410, the smallest, and the P value was analyzed to be 0.323, verifying that the reliability and stability were excellent. Therefore, these results will be utilized as a basis for the substantiation of a lightning preventive distribution line before its installation.

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References

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