• 제목/요약/키워드: Hemispherical water tank grounding simulation system

검색결과 4건 처리시간 0.018초

반구형 접지모의시스템을 이용한 접지전극의 형상에 따른 대지전위상승의 분석 (The Analysis of Ground Potential Rise for Shapes of Grounding Electrode Using Hemispherical Grounding Simulation System)

  • 길형준;최충석;이복희
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제54권7호
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    • pp.319-325
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    • 2005
  • In order to analyze ground potential rise of grounding system installed in buildings, the hemispherical grounding simulation system has been designed and fabricated as substantial and economical measures. Ground potential rise(GPR) has been measured and analyzed for shapes of grounding electrode using the system in real time. The system is apparatus to have a free reduced scale for conductor size and laying depth of a full scale grounding system and is constructed so that a shape of equipotential surface is nearly identified a free reduced scale with a real scale when a current flows through grounding electrode. The system was composed of a hemispherical water tank, AC Power supply, a movable potentiometer, and test grounding electrodes. The test grounding electrodes were fabricated through reducing grounding electrode installed in real buildings such as rod type, mesh grid type. When a mesh grid type was associated with a rod type, GPR was the lowest value. The proposed results would be applicable to evaluate GPR in the grounding systems. and the analytical data can be used 0 stabilize the electrical installations and prevent the electrical disasters.

구조체 접지의 전위상승에 대한 반구형 수조에 의한 측정값과 계산값의 비교 (Comparison of Theoretical Resu Its and Measured Data Using Hemispherical Water Tank Model for Potential Rise of Structure Grounding)

  • 길형준;최충석;김향곤;한운기;이복희
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2005년도 학술대회 논문집
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    • pp.111-114
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    • 2005
  • This paper presents a comparison of experimental value by hemispherical grounding simulation system and calculated value by CDEGS program for ground potential rise of structure. When a test current flowed through structure grounding electrodes, ground potential rise was measured and analyzed for types of structure using the hemispherical grounding simulation system in real time, and was computed by means of CDEGS program. The model structures were designed and fabricated with two types on a scale of one-one hundred sixty. When the experimental data were compared with the theoretical values, the similar profile was shown. Therefore, the confidence of measurement was obtained. The distributions of ground surface potential are dependent on the resistivity and absorption percentage in concrete attached to structure.

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Distribution of Potential Rise as a Function of Shape of Grounding Electrodes

  • Gil, Hyoung-Jun;Choi, Chung-Seog;Kim, Hyang-Kon
    • 조명전기설비학회논문지
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    • 제21권4호
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    • pp.73-79
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    • 2007
  • In order to analyze the potential rise of grounding systems installed in buildings, a hemispherical grounding simulation system was studied. Potential rise was measured and analyzed regarding the shape and distance of the grounding electrodes by using this system. The system was composed of a hemispherical water tank, AC power supply, a movable potentiometer, and test grounding electrodes. The potential rise was measured in real time by the horizontal moving probe of be potentiometer. The test grounding electrodes were fabricated through reducing the grounding electrode installed in real buildings such as the ground rod, grounding grid and so on. The potential rise was displayed in a two-dimensional profile and was analyzed regarding the shapes of the ground electrodes. The potential rise of the grounding grid combined with a ground rod was the lowest of every grounding electrode tested. The proposed results can be applicable to evaluating ground potential rise in grounding systems, and the analytical data can be used to stabilize the electrical installations and prevent electrical disasters.

봉상 접지전극 상호간의 전위간섭에 대한 평가 (Evaluations on the Potential Interferences between Ground Rods)

  • 이복희;이수봉;이태형;정현욱;길형준
    • 조명전기설비학회논문지
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    • 제20권5호
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    • pp.92-98
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    • 2006
  • 본 논문은 봉상접지전극 주변에서 접지전극간 전위간섭에 대해 다루었다. 접지전극 상호간의 전위간섭을 저감하는 기법을 제안하기 위해서 실규모 접지전각에서 발생될 수 있는 대지전위와 전위간섭을 이론적 해석과 축소모델 실험을 이용하여 실험적으로 분석하였다. 반구형 수조모의접지 실험장치로 접지전극 상호간 이격거리에 따른 전위 상승과 전위간섭계수를 측정하고, CDEGS 소프트웨어를 이용하여 이들 현상을 해석하였다. 그 결과 전위상승과 전위간섭계수는 접지전극의 이격거리에 강하게 의존하였으며, 실측결과는 이론적 계산결과와 잘 일치는 결과를 얻었다.