Photovoltaic multi-level inverters technology

In this paper three main types of multi-level inverters are reviewed (diode-clamped, flying capacitor, and cascaded H-Bridge inverters). Different multi-level inverter topologies which are currently available on the market as far as components for the electrical integration of PV systems are also concerned. The new trends of all of these topologies are seeking to reduce the cost, the size of the inverter and the losses by reducing the number of the switches and capacitors and keeping the output voltage steps high enough at least to be similar to the previous topologies.