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변문걸(W.J. Bian),박정국(Z.G. Piao),최석조(S.J. Choi),장용해(Y.H. Jang),이성길(S.G. Lee),백형래(H.L. Baek),조금배(G.B. Cho) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
The introduction of high brightness LEDs with white light and monochromatic colors have led to a movement towards specialty and general illumination applications. Because drive circuit of illumination LED has an effect on efficiency and life, research about the drive circuit following LED characteristic is needed. This paper proposed a implementation of the stand-alone LED lighting system using battery from photovoltaic power generation.
변문걸(W.J. Bian),박정국(Z.G. Piao),임홍우(H.W. Lim),이강연(K.Y. Lee),조금배(G.B. Cho),백형래(H.L. Baek) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The solar power system comprises a solar battery that directly converts light energy to electrical energy with a photovoltaic effect and a power converter system, that is, inverter that converts direct current power, which is generated from solar battery to common alternating current. In this paper, database was constituted through remote monitoring supervision measurement for the long-time positive operation of 3㎾ solar power system installed within the solar energy positive research complex of Chosun University. As a result of analyzing the reduction of the efficiency of solar battery and inverter that are compositional components of PV system through an analysis on the acquired data, the PV output was proven over 65% of the total output when insolation intensity exceeded 600W/m2 in 2005, and the array conversion efficiency dropped much more than rating; meanwhile, insolation intensity dropped below 600W/m2. Therefore, it has been demonstrated that approximately 35% of the entire amount of PV output operated under the condition that the inverter efficiency rate dropped rapidly by 60 to 70%.
최연옥(Y.O. Choi),김지훈(J.H. Kim),변문걸(W.J. Bian),이상일(S.Y Lee),조금배(G.B. Cho) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
This paper summarizes the results of these efforts by offering the PV generation system with solar tracking. The status of PV generation system with solar tracking components and interconnection and effects are summarized. Hence this paper discusses only points that might be useful for application.