Topological Analysis of Multilevel Inverter for Photovoltaic System

Abstract

-The multilevel concept is used to decrease the harmonic distortion in the output waveform without decreasing the inverter power output. This paper presents the important topologies of multilevel inverter like diode-clamped (neutral-point clamped), flying capacitor converter (FLC) and cascaded H-bridge with separate dc sources. This paper compares three different topologies of inverters with respect of power losses, Cost, weight and THD. A five level flying capacitor converter (FLC) and cascaded H-bridge inverter will be simulated with the implementation of PWM techniques and its effect on the harmonic spectrum will be analyzed. Each topology has their own features with corresponding advantages and disadvantages when used in a Renewable Energy Power system.