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김남해(N.H Kim),백병산(B.S Baek),전용주(Y.J Jeon),김지홍(J.H Kim),이병송(B.S Lee),김종우(J.W Kim) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper presents general concept of DC switch gear(DCSWGR). Normally, DCSWGR consist of Digital protection unit(DPU), High Speed Circuit Breaker(HSCB), Disconnect Switch(DS), Programmable Logic Control(PLC), Auxiliary Relays and etc. Most of the components has its special characteristics and their interface between each others are various and complex. In this paper every constituent general design are preceded and interface between each component are examined. And also DCSWGR operation logic with logical diagram including interlock signal are introduced.
이현원(H.W.LEE),김남해(N.H.KIM) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
AC to DC single phase PWM converter for traction application requires rated high power and voltage. Therefor, series or parallel operation o converters are necessary with considering th limitation of the power device specification.<br/> This paper compares the characteristic between two parallel operation of conventional PWM converter and Single phase three level converter about comparison of power circuit, cooling system control method and harmonic current by computer simulation
이현원(HW.LEE),장성영(SY.JANG),김연준(YJ.KIM),이광주(KJ.LEE),김남해(N.H.KIM) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
The AC-to-DC single-phase PWM rectifier for traction applications using high POWE semiconductor, IGCT is made and tested. Parallel operation of two PWM converter is adopted of increasing capacity of converters For reducing harmonics, the harmonic content is eliminated by th phase shift between two converters switching phase The output voltage control is achieved by intern. calculation without detecting the input current. The part of PLL used for controlling power factor i, simply implemented by software.
민병권(B. G. Min),이봉우(B. W. Lee),최현돈(H. D. Choi),김남해(N. H. Kim) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
환경오염과 화석에너지의 고갈 및 가격 급등에 따라 신재생 에너지에 대한 관심이 고조되고 있고 특히 태양광발전시스템은 전 세계적으로 그 수요가 폭발적으로 급증하고 있다. 본 논문에서는 태양광발전시스템의 최종단에서 가장 중요한 역할을 하는 태양광 인버터의 특별 사양에 대해 약술하고 당사에서 개발한 중소용량 인버터와 발전소용과 해외시장 진출을 목표로 개발 중인 250㎾급 태양광 인버터에 대한 개발사례에 대하여 기술한다.