Variation of output voltage thd for r and rl loads for an efficient developed cascaded multilevel configuration with less number of switches

Multilevel inverter is a very popular in various fields like FACTS devices,HVDC systems, industrial drives,photovoltaic systems etc. It has a large number of advantages like low stress on switches,lower harmonics,low switching losses etc. There are different topologies available like neutral point or diode clamped inverter, flying capacitor inverter etc. each having numerous disadvantages and advantages. The efficiency of this inverter is greatly improved by minimising the number of switches of the configuration used. The paper takes into account a developed cascaded topology to reduce the number of switches and reduce the harmonics. To find the effectiveness of the developed cascaded topology in improvement of efficiency, a simulative study is done to evaluate the effect of topology with increasing voltage levels for R and RL loads.The configuration provides better harmonics with increasing levels for both kinds of loads. Simulations are done in MATLAB-Simulink.