Reversing Voltage Nine Level Inverter Topology with Universal Control Scheme

Abstract

Multilevel inverters have been widely accepted for high-power high-voltage applications. A reversing voltage nine level inverter with Universal Control Scheme is presented in this paper. This topology compensates for the disadvantages of conventional multilevel inverters. The multilevel inverter configuration was subjected to R load and the output voltages are synthesized. Universal Control Scheme is developed such a way that it can be applied to all multilevel inverter topologies and also all the modulation schemes can be employed. Alternate Phase Opposition Disposition (APOD) SPWM modulation scheme is employed for the generation of gate signals to power switches. An LC filter is modelled to obtain pure sine wave output and is given to load. THD for the output voltage is measured and is found to be reduced by 45 percentage with LC filter. Simulation has been carried out to study the performance of the proposed topology in MATLAB/Simulink R2010a environment.