Analysis of an efficient cascaded inverter with different loads

Multilevel inverter is a very popular converter in many areas including renewable energy integration, HVDC systems, FACTS devices, industrial drives and numerous other power system and power electronic applications. It has many advantages like low power loss, lesser harmonics, low electromagnetic interference, reduced stress on switches etc. Many configurations have been developed over the last few decades like the neutral clamped inverter, flying capacitor inverter, advanced H bridge inverter etc. New configurations capable of reducing the number of switches and increasing the efficiency of inverter are always welcome. This paper considers an efficient topology with reduced number of switches and evaluates harmonic limiting capability. The control used is sinusoidal pulse width modulation. Simulation platform is MATLAB-Simulink. Total harmonics distortion (THD) values are calculated to find out the harmonic limiting capability.