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공통접속점에서의 노치 발생을 위한 간단한 구조의 전력변환기
변우열(W.Y.Byeon),안종수(J.S.Ahn),노의철(E.C.Nho),김인동(I.D.Kim),전태원(T.W.Chun),김흥근(H.G.Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.11
This paper describes a new notches generator for the test of custom power devices such as UPS, DVR, Active Power Filter, etc The magnitude, width, polarity, and position of the notches generated by the proposed scheme can be varied with simple control. The scheme has good features of simple structure, high reliability, and the capability of arbitrary several notches generation. The Circuit operation is described and the usefulness of the scheme is verified through simulations
플라이휠 저장에너지 UPS의 성능 시험을 위한 순간정전 및 전압불평형 발생기
김중원(J.W. Kim),이기수(K.S. Lee),변우열(W.Y, Byeon),노의철(E.C. Nho),김인동(I.D. Kim),전태원(T.W. Chun),김흥근(H.G. Kim) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper deals with a novel 3-phase power quality disturbance generator. The proposed generator can be applied to the performance that of custom power devices. Voltage sag, swell, outage unbalance and phase shift are provided by the generator. The control scheme for the disturbance generation is simple, and hardware setup is cost effective compared with conventional scheme. The operating principle of the generator is described and the usefulness verified through simulation with 10㎸A power rating.
플라이휠 저장 에너지를 이용한 무순단 전압보상 기능을 갖는 UPS
이기수(K.S. Lee),김중원(J.W. Kim),변우열(W.Y. Byeon),노의철(E.C. Nho),김인동(I.D. Kim),전태원(T.W. Chun),김흥근(H.G. Kim) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper deals with the operation of a flywheel energy storage UPS. The ups has good features such as long life-time, improved efficiency, no environment problems, reduced size and space, and low maintenance cost compared with the conventional UPS using battery. The operating principle of the UPS is analysed in each mode including charging, voltage compensation, discharging, and voltage unbalance compensation. Especially, the tracking characteristic of the disturbed phase of the source voltage after outage is analysed. The usefulness of the operation is proved through simulations.
플라이휠 저장 에너지를 이용한 다이나믹 UPS 동작 특성 분석
이기수(K.S. Lee),김중원(J.W. Kim),변우열(W.Y. Byeon),노의철(E.C. Nho),김인동(I.D. Kim),전태원(T.W. Chun),김흥근(H.G. Kim) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.5월
This paper describes a dynamic UPS system with flywheel energy storage element. There are three operating modes of charging, voltage compensation, and UPS. The operating principle of each mode is analyzed and simulated. The simulation results show the validity of the operation of the proposed scheme.