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H.Terai,S.Sumiyoshi,T.Kitaizumi,H.Omori,K.Ogura,S.Chandhaket,M.Nakaoka 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10
The utility interactive sinewave modulated inverter for the solar photovoltaic (PV) power conversion and conditioning with a new high frequency pulse modulated link is presented for domestic residential applications. As compared with the conventional full-bridge hard switching PWM inverter with a high frequency AC link, the simplest single-ended quasi-resonant soft switching sinewave modulated inverter with a duty cycle pulse control is implemented, resulting in size and weight reduction and low-cost. This paper presents a prototype circuit of the single-ended zero voltage soft switching sinewave inverter for solar power conditioner and its operating principle. In addition, this paper proposes a control system to deliver high quality output current. Major design of each component and the power loss analysis under actual power processing is also discussed from an experimental point of view. A newly developed interactive sinewave power processor which has 92.5% efficiency at 4kW output is demonstrated. It is designed 540mm-300mm-125mm in size, and 20kg in weight<br/> Index Terms- A quasi-resonant inverter, Zero voltage soft switching, Photovoltaic power conversion system, Utility interactive power generator, High frequency transformer link.<br/>