http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
준평등전계에서의 Dry-Air 노점과 고체절연물 재질 및 형상에 따른 연면방전 특성 연구
민경준(Gyeong-Jun Min),강병칠(Byoung-Chil Kang),임동영(Dong-Young Lim),이광식(Kwang-Sik Lee),박원주(Won-Zoo Park) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.6
This study investigates the surface discharge characteristics of solid insulators by varying their materials, their shapes, and the dew-point of dry-air. The methodology of this study is that a quasi-uniform field is first applied to a test chamber. Then, the chamber is filled with dry-air as an insulation gas which pressure is varied from 1 to 6atm while applying an AC voltage to the chamber. The used solid insulators are teflon, polycarbonate, and bakelite. As the dew-point is lower and the pressure of dry-air is higher, the flashover voltage of all solid insulators increases more. When each characteristic of the solid insulators is compared under the same gas pressure, the flashover voltage of teflon is the highest. Then, the flashover voltage of polycarbonate is higher than that of bakelite. Moreover, it is observed that the flashover voltage increases as the diameter and the thickness of each solid insulator become larger and thicker, respectively. However, the thickness of the solid insulators is more critical for increasing the flashover voltage than their diameter.
건조공기의 연면방전에서 가스압력과 극간거리에 따른 매질효과분석
임동영(Dong-Young Lim),민경준(Gyeong-Jun Min),박혜리(He-Rie Park),최은혁(Eun-Hyeok Choi),최상태(Sang-Tae Choi),배성우(Sung-Woo Bae),이상봉(Sang-Bong Rhee),박원주(Won-Zoo Park),이광식(Kwang-Sik Lee) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.10
In studies on an alternative insulating gas of SF6 gas, the section of the alternative gas and an insulation technique to improve its low dielectric strength have been reported, but very few attempts have been made at the dependence of a gas pressure and a gap as well as the medium effect in the alternative gas. The purpose of this paper is to analyze the dependence of the gas pressure and the gap at surface flashover voltage in dry air. The dependence is analyzed based on the medium effect. The medium effect by the gas pressure and the gap can be explained by surface roughness of a solid dielectric and an electrode as well as an electric field which decreases due to the correlation between the collision ionization coefficient and the gap, respectively. In addition, an insulation technique which can fabricate a compact eco-friendly gas insulated switchgear is proposed by the results of this paper.
친환경 절연가스 중 연면절연성 향상을 위한 고체유전체의 유전율과 지름에 따른 연면방전특성 연구
임동영(Dong-Young Lim),민경준(Gyeong-Jun Min),박혜리(He-Rie Park),최은혁(Eun-Hyeok Choi),최상태(Sang-Tae Choi),박원주(Won-Zoo Park),이광식(Kwang-Sik Lee) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.1
This paper studied surface discharge characteristics by a dielectric constant and diameter of solid dielectrics in N2/O2 mixture gas. Applied electric field strength at N2/O2 mixture gas was changed from the dielectric constant and diameter of the solid dielectrics, and insulation performance of the N2/O2 mixture gas determined surface discharge voltage. In each of the diameter at the solid dielectrics, the surface discharge voltage was increased by lengthening surface distance, whereas increasing rate of the surface discharge voltage was different from gas pressure. Thus, In this paper, main factors of surface discharge are as follows. 1) Insulation performance of N2/O2 mixture gas, 2) Dielectric constant of solid dielectrics, 3) Surface discharge path. It was clear that the surface discharge voltage depend on the main factors. These results will be applied to useful data for an eco-friendly composite insulation design.
Dry Air 중의 준평등전계에서 노점과 고체절연물 재질에 따른 수평연면방전 특성 연구
강병칠(Byoung-Chil Kang),석정후(Jeong-Hoo Seok),민경준(Gyeong-Jun Min),배성우(Sungwoo Bae),이광식(Kwang-Sik Lee),박원주(Won-Zoo Park) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.1
This study investigates the Horizontal surface discharge characteristics of solid insulators by varying their materials, and the dew-point of dry-air. The methodology of this study is that a quasi-uniform field is first applied to a test chamber. Then, the chamber is filled with dry-air as an insulation gas which pressure is varied from 1 to 6atm while applying an AC voltage to the chamber. The used solid insulators are teflon, polyethlene and polyurethane. As the dew-point is lower and the pressure of dry-air is higher, the flashover voltage of all solid insulators increases more. When each characteristic of the solid insulators is compared under the same gas pressure, the flashover voltage of teflon is the highest. Then, the flashover voltage of polyethlene is higher than that of polyurethane. Moreover, it is observed that the flashover voltage increases as the horizontal distance between the electrodes of each solid insulator become larger, respectively. However, as the pressure is increased, flashover voltage of the solid insulators is saturated. Therefore, selection of cost-effective insulation is needed in order to appropriate pressure.