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Flyback Inverter Using Voltage Sensorless MPPT for Photovoltaic AC Modules
류동근,최봉연,이순령,김영호,원충연 전력전자학회 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.6
A flyback inverter using voltage sensorless maximum power point tracking (MPPT) for photovoltaic (PV) AC modules ispresented. PV AC modules for a power rating from 150 W to 300 W are generally required for their small size and low pricebecause of the installation on the back side of PV modules. In the conventional MPPT technique for PV AC modules, sensors fordetecting PV voltage and PV current are required to calculate the PV output power. However, system size and cost increase whenthe voltage sensor and current sensor are used because of the addition of the auxiliary circuit for the sensors. The proposed methoduses only the current sensor to track the MPP point. Therefore, the proposed control method overcomes drawbacks of theconventional control method. Theoretical analysis, simulation, and experiment are performed to verify the proposed control method.