Comparitive Study of Conventional Inverter Topologies for Stand-Alone PV System

Multilevel converters, generally, used in medium and high-power system applications, of any configurations, offer higher efficiency and lower THD. With the advance of renewable energy systems, particularly photovoltaic (PV) systems, there is always an ever-increasing need for highly efficient multilevel inverters to cater the AC loads. The present work aims at comparing the basic three inverter topologies [Diode clamped, Flying-Capacitor, Cascaded H-Bridge inverter] of five-level inverter for a stand-alone PV-system. The efficiency and harmonic distortion of these configuration are compared. The entire work is carried out in MATLAB Simulink Environment.