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승강압초퍼와 부분공진 인버터를 이용한 계통연계형 태양광 발전시스템
고강훈(K.H.Koh),이현우(H.W.Lee),김영철(Y.C.Kim),정명웅(M.W.-Jung),홍두성(D.S.Hong) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
In a utility interactive photovoltaic system, a PWM inverter is used for the connection between the photovoltaic arrays and the utility The DC current becomes pulsated when the conventional inverter system operates in the continuous current mode and DC current pulsation causes the distortion of the AC current waveform. This paper presents the reduced pulsation of DC input current by operating the inverter with buck-boost chopper in the discontinuous conduction mode. The DC<br/> current which contains harmonics component is analyzed by means of separating into two terms of a ripple component and a direct component. The constant DC current without pulsation is supplied from photovoltaic array to the inverter. The proposes inverter system provide a sinusoidal AC current for domestic loads and the utility lme with unity power factor.