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3상 계통연계형 태양광발전시스템의 태양전지 출력단 전압제어에 관한 연구
남종하(J.H.Nam),강병회(B.H.Kang),고재석(J.S.Gho),최규하(G.H.Choe),신우석(W.S.Shin) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
Generation of electrical energy faces many problems today Solar power converters were used to convert the electrical energy from the solar arrays to a stable and reliable power source The object of this paper IS to analyze and design DC-DC converters in a solar energy system to investigate the performance of the converters. A DC-DC converter can be commonly used to control the power flow from solar cell to load and to achieve maximum power point tracking(MPPT), DC-AC converter can also be used to modulate the DC power to AC power being applied on common utility load<br/> A DC-DC converter is used to boost the solar cell voltage to constant 360[V] DC link and to ensure operation at the maximum power point tracking If a wide input voltage range has to be covered a boost converter is required In this paper, author described that simulation and experimental results of PV system contain solar modules, a DC- DC converter(boost type chopper), a DC-AC converter (3-phase inverter) and resistive loads.
남종하(J.H. Nam),최진홍(J.H. Choi),김승종(S.J. Kim),김재웅(J.W. Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
The development of electric vehicle has been accelerated by the recent "California Initiative" which has required increasing proportions of new vehicle in Los Angeles area to be ZEV (Zero Emission Vehicles), But, because skill of battery is feeble, ZEV regulation was postponed but that is by CO2 restriction and environmental pollution problem the latest because do development require, In the electric vehicle and hybrid electric vehicle, the battery ECU (Battery Management System, BMS) is very Important and an essential equipment The accurate state of charge(SOC) is required for the battery for hybrid electric vehicles,<br/> This paper proposes SOC algorithm for the HEV based on the terminal voltage Also, designed and analyzed battery ECU to apply on HEV<br/>
3상 직렬형 능동필터의 입력전압변동에 대한 전향보상이득에 관한 연구
권형남(H.N. Kwon),남종하(J.H. Nam),강병희(B.H. Kang),최규하(G.H. Choe),한석우(S.W. Han) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.-
Recently, as the development of industry, the nonlinear load becomes increased. Because of nonlinear load, the variation of source voltage is generated by the impedance of source side flowed harmonic currents. For blocking harmonic currents by nonlinear load, a series active power filter operates blocking resistance of harmonic currents. The value of blocking resistance shows ideal compensating characteristic out of theoretically infinite value. But the blocking resistance is limited by the problem of the system stability and the capacity of inverter. In tins paper, the value of optimum blocking resistance is found by a simulation in the applied system. In the case of unbalanced source voltages, each relation of the blocking resistance is shown. It is proved that blocking resistance of series active power filter relates to a passive filter.<br/> <br/>
황호석(H.S.Hwang),남종하(J.H.Nam),장대경(D.K.Jang),최진홍(J.H.Choi),신익수(I.S.Sin) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.11
For a power source of usual electronic devices such as PDA, smart phone, UPS and electric vehicle, the battery made of serially connected multiple cells is generally used. In this case, if there are some unbalanced among cell voltages, the total lifetime and the total capacity of the battery are limited to a lower value. To maintain a balanced condition in cells, an effective method of regulating the cell voltage in indispensable. In this paper introduced a method for battery balancing system using dissipation in the resistance.