New Approach of Multi-Cell Stacked Cell Inverter for Solar Photovoltaic System

In this paper, a new inverter topology dedicated to isolated or grid-connected PV systems is proposed. This inverter is based on the structures of a stacked multi-cell converter (SMC) and an H-bridge. This new topology has allowed the voltage stresses of the converter to be distributed among several switching cells. Secondly, divide the input voltage into several fractions to reduce the number of power semiconductors to be switched. In this contribution, the general topology of this micro-inverter has been described and the simulation tests developed to validate its operation have been presented. Finally, we discussed the simulation results, the efficiency of this topology and the feasibility of its use in a grid-connected photovoltaic production system.

层叠式多单元逆变器浮动电容器电压平衡控制方法

层叠式多单元逆变器是近年来提出的一种新的多重拓扑结构的逆变器,非常适用于高性能、高电压系统中。但其存在浮动电容器的电压失配问题,尤其在低开关频率时尤为显著。基于层叠式多单元逆变器(SMC)电路,提出了一种平衡浮动电容器电压的控制方法,以保证开关电压的均匀分布,同时改进输出电压和电流频谱。采用正弦脉冲模拟技术被用于证实了控制方法的可行性。