한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제33권2호
  • /
  • Pages.130-134
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  • 2020
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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커플링/디커플링 네트워크 내장 서지발생장치의 설계 및 제작

Design and Fabrication of a Surge Generator with Coupling/Decoupling Networks

  • 김남훈 (한국해양대학교 전기전자공학과) ;
  • 강태호 (한국해양대학교 전기전자공학과) ;
  • 신한신 (한국해양대학교 전기전자공학과) ;
  • 길경석 (한국해양대학교 전기전자공학과)
  • Kim, Nam-Hoon (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University) ;
  • Kang, Tae-Ho (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University) ;
  • Shin, Han-Sin (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University) ;
  • Kil, Gyung-Suk (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University)
  • 투고 : 2019.10.15
  • 심사 : 2019.11.04
  • 발행 : 2020.03.01
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초록

Metal oxide varistors (MOVs) protect circuits and devices from transient overvoltages in electric power systems. However, a MOV continuously deteriorates owing to manufacturing defects or repetitive protective operations from transient overvoltages. A deteriorated MOV may result in a short circuit or a line-ground accident. Previous studies focused on the analysis of deterioration mechanisms and condition diagnosis techniques for MOVs owing to their recent growth of use. An accelerated deterioration experiment under the same conditions in which a MOV operates is essential. In this study, we designed and fabricated a surge generator that can apply a surge current to a MOV connected to AC mains. The coupling network operates at a low impedance against the surge current from the surge generator and transfers the surge current to the MOV under test. It also acts as a high impedance against AC mains for the AC voltage not to be applied to the surge generator. The decoupling network operates at a high impedance against the surge current and blocks the surge current from AC mains. It also acts as a low impedance against AC mains for the AC voltage to be applied to the MOV under test. The prototype surge generator can apply the 8/20 us up to 15 kA on AC voltages in the approximate range of 110~450 V, and it fully operates on a LabVIEW-based program.

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참고문헌

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