Real-time implementation of three phase 27-level multilevel inverter with DC carrier PWM technique

Nowadays the asymmetrical cascaded Multi-Level Inverter (MLI) concepts are predominantly investigated. This paper deals with the multi constant dc carrier modulation strategy for 3Φ 27 level Trinary Hybrid MLI (THMLI). The suitability and qualities of the modulation strategy is investigated by simulation using MATLAB/Simulink and also implemented in real time using dSPACE real time interface controller. The proposed task focuses on the reduction of harmonics content in output phase voltages and line voltages of the 3Φ THMLI. The viability of the multi constant dc carrier technique on the MLI has also been presented.