Testing the Advanced Single Phase Asymmetric
Cascaded Multilevel Inverter Topology using RES
Moloy Cgandra Dey, Shamima Akther, Priyangka Talukder, Afshana Begum and Md Moontasir Rashid
This paper works on developing a model of single phase asymmetrical cascaded multilevel inverter (MLI) which
couples’ renewable energy sources (RES) to the electrical or electronic loads of the AC powered transport system applications (e.g.,
Locomotives, Vehicles). MLI is the most important device as it is
the main adaptation stage between the source and the load. Researchers are now more focused on multilevel inverters because of
its numerous advantages. The prime benefit of a multilevel inverter is obtaining more output voltage levels using a smaller number
of DC sources. The proposed topology for this work is asymmetric and produces 31-Levels of output which consists of 12 IGBT
switches and 4 isolated dc voltage supplies V dc1 , V dc2 , V dc3 and V dc4
(Ratio of 2:4:8:16). The proposed topology has been processed by
using PWM (Pulse Width Modulation) technique. Fundamental switching frequency (50HZ) has been used to achieve better
quality of output voltage waveform with low harmonic distortion.
The proposed topology has been explicitly and thoroughly analyzed throughout the study to demonstrate its superiority over
alternative MLI topologies. Power loss analysis of the chosen MLI
topology is also shown. An adequate comparison is also carried
out between traditional and the proposed topologies. The comparative analysis shows that the chosen existing topology is better performed than others. According to the theoretical analysis
conducted, the maximum efficiency obtained is 92.91% along with
THD of 4.44% and TSV of 60 V dc . The accuracy of the proposed
topology is verified through simulating the entire model in MATLAB-Simulink software.