Development of high-gain high-efficiency grid-connected inverter for PV Module

This paper proposes a high gain and high efficiency power conditioning system for grid connected PV module. The system consists of a one module of PV, boost converter with high gain transformation ratio, and single-phase H-bridge inverter. The system is suitable for using less number of PV modules or using only one PV module for the grid connection applications which called ac modules. Since the controller will disconnect the whole string of PV modules in case of one PV module is affected by, for example, the shadow. As a result, the proposed system can avoid this phenomenon which results in increasing the whole system efficiency. The paper also proposes an accurate PV cell model which considers the environmental conditions such as temperature and shadow effects. A modified maximum power point tracking (MPPT) algorithm based on the conductance MPPT will be proposed. Additionally, the system will be connected to the utility grid at unity power factor. The proposed system have been studied, analyzed, and simulated for the validation. Also some selected of the experimental results have been provided.