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공통 DC단을 갖는 복합발전시스템을 위한 전력균형제어에 관한 연구
정병환(B.H Jeong),조준석(J.S Cho),고재석(J.S Gho),최규하(G.H Choe),김응상(E.S Kim),이창성(C.S Lee) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
This paper discusses power balance control of<br/> photovoltaic/wind/diesel hybrid generation system for remote area power supplies. There are many control methods for hybrid power system. Among others, it must be adopted that the control method to guarantee a stable balance between supply and demand, regardless of the fluctuation of generator power by atmospheric changes In this paper, it IS proposed that a hybrid generation system has a power-balanced controller to equilibrate generation power with a load demand, which IS composed of DC bus-type power systems To execute power balance control, It is assumed that all of power generators have a equivalent current-source characteristics Through the results of simulation, the proposed scheme was verified
정병환(B-H Jeong),강병희(B-H Kang),김홍성(H-S Kim),최규하(G-H Choe),최영호(Y-H Choi),김재철(J-C Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
In this paper, electronic-controlled power supply(EPS) system for solar cell characteristic is proposed to solve various problems and to achieve reliable experimental result on photovoltaic system. This system emulates the solar cell output characteristics, and it can substitute solar cell in laboratory experiment system. New model for solar cell is proposed to realize the EPS system for solar cell,which is based on the interpolation. Both simulation and experiment are executed to show the validity of the proposed EPS system.
공간전압벡터 PWM을 이용한 7상 영구자석형 동기전동기의 구동 시스템
김한구(H.G. Kim),최문규(M.G. Choi),정병환(B.H. Jeong),목형수(H.S. Mok),최규하(G.H. Choe) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
The motor research of pre-existing attaches importance about one and three motor of reduce torque ripple and speed control. 3-Phase PMSM Motor, which is generally used, has limited usage in high speed, due to pulsation torque and variable speed. To solve this problem, it is necessary to increase invariable, pole number or the number of slots. In this paper 7-Phase PMSM Motor of Steady state analysis of Torque and Output Voltage characteristic. 7-Phase modulation method with Space Voltage Vector is studied for ideal operation of controller.
박종찬(J. C. Park),김한구(H. G. Kim),정병환(B. H. Jeong),강병희(B. H. Kang),최규하(G. H. Choe) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
Recently, power supply-demand instability due to the dramatic increase in power usage suchas air-conditioning load at summertime has brought forecasts of decrease in power supply capability. Therefore improving the load factor through systematic load management, in other words, Direct Load Control became necessary. Direct Load Control(DLC) system is kind of a load management program for stabilization of electric power supply-demand. It's purpose is limiting the demand of the demand side selected at peak load or other time periods. The paper presented a Design of Direct Load Controller for control the amount of power demand in demand side. The proposed Controller is cheaper and has ability of storing more power data than pre-existing device.
이용균(Y.K.Kee),정병환(B.H.Jeong),전윤석(Y.S.Yoon),목형수(H.S.Mok),최규하(G.H.Choe) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.11
As rapid growth of energy demand in line with modem society's industrialization led to environmental pollution by fossil fuels, there are more and more interest and international research on energization of water, which is clean energy and comprising 70% of earth. In offshore countries, the water is commercially used already and water has very attractive characteristics in terms of economy and efficiency compared to the existing gas welder<br/> Brown Gas welder does not produce co₂ from combustion of Hydrogen-Oxygen-Gas , which was gamed by electrolysis of water. In tills paper, the result from operating characteristic improvement of Gas Generator and Current-Control1ed converter is to be considered into design in electrode, source/controller, standized into level of whole system design base.
이상용(S.Y. Lee),정병환(B.H. Jeong),오방원(B.W. Oh),이병인(B.I. Lee),최규하(G.H. Choe) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
Many solar cell array need to be connected by series or parallel to extract the high power, Especially, during parallel operation to reduce circulation current the individual converter has to share and control the load current. Generally, current Sharing(CS) can be implemented using droop and active current sharing method In this paper, one 3[KW] PWM converter was replaced as one 3[KW] solar cell array(3 parallels, each parallel has twenty single modules), two 3[KW] solar cell array is paralleled to generate 6[KW] power, Also each converter used voltage-current controller and Automatic MSCPM(Master-Slave Current-programming Method) for current sharing(AS)