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DCM에서 PV시스템용 부스트 컨버터의 개선된 제어방식
이영진(Young-Jin Lee),한동화(Dong-Hwa Han),변병주(Byeong-Joo Byen),최중묵(Jung-Muk Choi),바이스갈랑(Dugarjav Bayasgalan),최규하(Gyu-Ha Choe) 전력전자학회 2013 전력전자학회 논문지 Vol.18 No.4
This paper presents a improved control technique to overcome disadvantage when the inductor current of boost converter in PV system becomes DCM(Discontinuous Conduction Mode) due to the low insolation. MPPT(Maximum Power Point Tracking) output reference voltage could not be exactly followed by conventional dual-loop PI control method used typically because of the error between the actual current and measured current. Therefore, in this paper, Hybrid controller that changes the control method in DCM and CCM(Continuous Conduction Mode), and single state feedback controller are used to compensate that problem. The proposed control technique was verified by simulation using PSIM 9.0 and experiments.