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우현민(Hyun-Min Woo),이병헌(Byung-Hun Lee),장한솔(Han-Sol Chang),나재두(Jae-Du La),김영석(Young-Seok Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
In recent years many researches for DC power distributed system (PDS) are being preformed and the importance of the DC PDS is more and more emphasized. Furthermore in the railway system the DC PDS is used in subway station lighting facilities etc. In the DC PDS DC bus voltage instability may be occurred by the operation of multiple parallel loads such as pulsed power load motor drive system and constant power loads. Thus good quality and high reliability for electric power are required and voltage bus conditioner (VBC) may be used the DC PDS. The VBC is a DC/DC converter for mitigation of the bus transients. In this paper adaptive controller is designed. The simulation results by PSIM are presented for validating the proposed control algorithm.
병렬펄스부하를 갖는 직류배전시스템을 위한 능동 공진 댐퍼에 대한 연구
나재두(Jae-Du La),이병헌(Byung-Hun Lee),장한솔(Han-Sol Chang),우현민(Hyun-Min Woo),김영석(Young-Seok) 대한전기학회 2012 전기학회논문지 Vol.61 No.9
An active resonance damper for a DC Distributed Power System(DPS) with parallel loads is presented. Each pulse power load in a DC DPS comprises both a resistive power load and a step-up converter. The step-up converter behave as constant power load(CPL) when tightly regulated and usually cause a negative impedance instability problem. Furthermore, when an input filter is connected to a large constant power load, the instability of DC bus voltage. In this paper, a bidirectional DC/DC converter with a reduced storage capacitor quantitatively are proposed as a active resonance damper, to mitigate the voltage instability on the bus. The validity of the proposed method was confirmed by simulation and experimental works.