Flyback inverter using voltage sensorless MPPT for photovoltaic AC modules

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Abstract

A flyback inverter using voltage sensorless maximum power point tracking (MPPT) for photovoltaic (PV) AC modules is presented. PV AC modules for a power rating from 150 W to 300 W are generally required for their small size and low price because of the installation on the back side of PV modules. In the conventional MPPT technique for PV AC modules, sensors for detecting PV voltage and PV current are required to calculate the PV output power. However, system size and cost increase when the voltage sensor and current sensor are used because of the addition of the auxiliary circuit for the sensors. The proposed method uses only the current sensor to track the MPP point. Therefore, the proposed control method overcomes drawbacks of the conventional control method. Theoretical analysis, simulation, and experiment are performed to verify the proposed control method.

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Ryu, D. K., Choi, B. Y., Lee, S. R., Kim, Y. H., & Won, C. Y. (2014). Flyback inverter using voltage sensorless MPPT for photovoltaic AC modules. Journal of Power Electronics, 14(6), 1293–1302. https://doi.org/10.6113/JPE.2014.14.6.1293

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