Performance comparison between Fuzzy Logic based 3*2 and 5*2 Multicell converter

This paper provides the analysis of Multicell converter at different levels which decreases the THD with increase in levels. This topology called SMC (Stacked Multicell Converter) consists of a hybrid association of commutation cell making possible to share the voltage constraint on several switches, and also to improve the output waveforms of the converter in terms of number of levels and switching frequency. PWM technique is used to control the rms voltage at the output. A closed loop control is proposed using MATLAB Fuzzy Logic Toolbox, to control the rms voltage at the output. A complete fuzzy inference process to control the converter is shown. The Fuzzy Controller for 3×2 and 5×2 multicell converter is compared and it has been found that 5×2 multicell converter has good voltage constraint sharing feature than its 3×2 counterpart with reduced number of switches.