Analysis and Simulation of Novel Multi level Inverter Topology for Grid Interconnection of PV Systems

Abstract

Photovoltaic energy is a wide kind of green energy, because photo voltaic solar are pollution free, easily erectable, and limitless.  Photovoltaic  systems  are  mostly  used  as  they  are  light,  clean  and  easily  installable.  Normally  PV  cells  converts  sunlight  into  electricity  in  the  form  of  dc A high performance on these systems is needed to make the most of energy produced by solar cells. Also, there must be a constant adaptation due to the continuous variation of power production. : In any PV based system, the inverter is a critical component responsible for the control of electricity flow between the dc source, and loads or grid. This paper presents a solar PV generation system integrated to the grid. the comparative operation of inverter topologies which are the conventional two level  inverters and multilevel inverter topology to reduce total harmonic distortions in grid voltage and electromagnetic  interference. Unique features of multi-level converters have recently nominated them as significant alternatives for solid-state power converting units, even in the low and medium power range. The fact that multilevel converters need several DC sources in the DC side makes them attractive for photovoltaic (PV) applications. This project presents a new control strategy to control cascaded multilevel converters in a multi-string configuration for single phase grid connected system. In extension the proposed concept can be implemented for new multilevel inverter concept by using MATLAB/SIMULATION software.