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- 저자 : 이병인(B.I. Lee) (검색결과 56 건)
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Droop Method를 용한 50[W]급 태양전지 가상구현 시스템의 병렬연결 출력특성에 대한 연구
이병인(B.I. Lee),이상용(S.Y. Lee),오방원(B.W. Oh),정병환(B.H. Jung),최규하(G.H.Choe) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
General1y, photovoltaic system is composed with several solar cell modules. For increasing power of photovoltaic systems, serial and parallel connection needed. A Desirable characteristic of a parallel supply system is that individual converters share the load current equally and stably. The current sharing(CS) can be Implemented using two approaches. The first one, known as a droop method, relies on the high output impedance of each converter. and The second approach, known as active current-sharing techniques. In this paper, using droop method at parallel connection with it's convenience and simplicity.<br/>
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논문 : 제조공정 ; SCM 440 빌렛트의 수평 연속주조시 표면품질에 미치는 인발 사이클과 주조속도의 영향
이병화 ( B. H. Lee ),유병돈 ( B. D. You ),김목순 ( M. S. Kim ),정일권 ( I. K. Jung ),윤황로 ( H. R. Yoon ) 대한금속재료학회 ( 구 대한금속학회 ) 1998 대한금속·재료학회지 Vol.36 No.7
Trial tests were made to examine the effects of casting pattern on the surface quality of SCM 440 billets in horizontal continuous casting. The withdrawal cycle and the casting speed were varied 40~80 cycle/min and 0.7~1.0 m/min respectively. The main results obtained could be summarized as follows: When the withdrawal cycle is low, the withdrawal mark is irregular and the surface of billet is rough due to the formation of the lapped skin. The increase of withdrawal cycle results in the uniform withdrawal mark and the fine surface of cast products. The very low or the very high withdrawal cycle is essential for the prevention of transverse cracks on surface and corner cracks of the billet. For the case of the withdrawal cycle of 50 cycle/min, the effects of casting speed on the formation of transverse cracks and on the surface roughness could not be justified accurately due to the formation of lapped skin. The casting speed does not affect, however, the formation of the corner crack.
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태양전지 가상구현 장치를 위한 새로운 태양전지 모델링에 관한 연구
이병인(B.I.Lee),류태규(T.G. Ryu),한정만(J.M. Han),최규하(G.H. Choe) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
A study on photovoltaic system has a lot of problems. Such as repetition expenment in the same condition, development of MPPT (Max-Power Point Tracking) algorithm^[1][2], dev-elopment of Islanding detection algorithm and so forth. The reason IS that solar cell output characteristics are vaned by insolarion and surface temperature of solar cell. Therefore, the assistance equipment is required which emula-tes the solar cell characteristics In this paper, propose the new modeling of solar cell and verify this modeling using MA TLAB simulation, And experiment virtual Implement of solar cell system using this modeling
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부스트 컨버터를 이용한 3Kw 태양전지 어레이 가상구현 설계
오방원(B.W. Oh),이상용(S.Y. Lee),이병인(B.I. Lee),정병환(B.H. Jung),최규하(G.H. Choe) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
Recently, energy problem has become more Important thing than that of past years. Therefore, researchers in many countries are trying to find the solution for removing energy problem. One of all is the power generation with using the photovoltaic system. Because this system has some advantage, like purity and infinity. However, there are some problems to generate electrical power with using photovoltaic system. That problems, taking up a very big space and taking financial worries, come into existence. So it is inevitable to make the virtual implement equipment for doing repetition experiment and solving this problems. In this paper, Boost converter are analyzed and simulated to make high power PV virtual implement system as input source instead of using transformer.<br/>
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