Abstract: Reduction of harmonics is an important issue of power electronic conversion systems. This paper introduces Sinusoidal Pulse Width Modulation technique (SPWM) to reduce harmonics in Flexible Power Electronic Transformer (FPET). The simulated FPET has enough flexibility to satisfy future needs of power electronic centralized systems. More harmonic waveforms of FPET in comparison to the similar circuit topologies proposed for multilevel Power Electronic Transformer. SPWM technique will be applied to FPET to reduce these harmonics and to control voltage for the improvement of quality of power supply. The models are designed in MATLAB/SIMULINK. SPWM technique is discussed here and applied with results to analyze less THD.

Keywords: DC Source, IGBT, INVERTER, CYCLOCONVERTER, LC-FILTER, SPWM, Bi-DIRECTIONAL POWER FLOW, HFIT.