Flyback inverter using voltage sensorless MPPT for AC module systems

This paper presents a flyback inverter using voltage sensorless maximum power point tracking (MPPT) for AC module systems. In conventional MPPT technique, a PV voltage and PV current are required to calculate the PV output power for the MPPT operation. A proposed method only used for the PV current detection sensor to perform MPPT. When the PV current is sensed, proposed method calculates the electric charge quantity for MPPT control, which is essential to real systems. So, the perturbation and observation (P&O) MPPT is operated with PV current and the calculated electric charge quantity. Detailed analysis and the flowchart of the algorithm for the proposed scheme are included. The effectiveness of the proposed system is verified thorough PSIM simulation and experiments on a 200[W] prototype.