Indonesia Conference Directory

One of attractive solution for PV ac-module is flyback-type micro inverter since it has a number of advantages include simple control, stable current injection and potentially low-priced technique. However, the typical flyback-type micro inverter would produce high voltage ripple in the DC-link. As a concequence, a high total harmonic distortion would likely be expected in the system. Therefore, a technique for minimising the total harmonic distortion within standard level is required. Generally, adding capacitor in the DC-link is usually considered as the solution to reduce the voltage ripple. This technique is not a cost-effective solution. Furthermore, the dimension of the inverter package will be bigger to have more space for additional capacitors. This paper proposes a control method to reduce harmonic level for flyback-type micro-inverter using Maximum Power Point Tracker (MPPT). The MPPT technique decribed in this paper used perturb and observe (P&O) method. This method is simple and yet highly efficient. Several experiments have been carried out to examine the effectiveness of the proposed method. The results show that the proposed method can reduce the harmonic level significantly. Moreover, the method can reduce the capacitance used in the DC-link of the flyback inverter.