Analysis of Novel Multilevel Inverter with Nearest Level Technique for Medium Voltage Applications

Abstract

            This paper presents a analysis on novel multilevel inverter topology with reduced number of dc sources and power switches. Comparison is presented for recent and proposed multilevel inverter topology to prove the required number of power electronics components and blocking voltages. The presented topology is configured with less number of switches to show the output voltage with improved voltage THD harmonic profile and RMS value. The Nearest level modulation technique is introduced with different DC offset value to evaluate the voltage harmonic at the load. The validation is done for presented topology by using simulation software MATLAB/Simulink and laboratory based experimental test. Finally, the 11-level output voltage is discussed and superiority of presented topology is proved. This is widely used in naval application where renewable energy sources are converted from DC to AC using the proposed topology to power the propellers.