Comparison of Different Modulation Techniques in
Single Phase Modular Multilevel Converter
Journal:
GRENZE International Journal of Engineering and Technology
Authors:
Flavia Johnson K
Volume:
3
Issue:
2Special Issue
Grenze ID:
01.GIJET.3.2Special Issue
Pages:
102-107
Abstract
The concept of modular multilevel converter is to achieve high power
semiconductor switches with several lower voltage dc sources to perform the power
conversion. Voltage levels in modular multilevel converter are used in High voltage
applications and electric drives. The project focuses on the comparison of modulation
techniques in single phase modular multilevel converter. The carrier based modulation
technique is compared with staircase modulation technique. Level shift carrier based
modulation technique is used for comparison with staircase modulation technique. The
performance of both modulation techniques is compared by total harmonic distortion in
MATLAB/SIMULINK. Simulation results for modular multilevel converter are done with
seven sub modules in upper arm and lower arm. The level shift modulation technique has
lesser percentage of total harmonic distortion.