Selective harmonic elimination for the modular multilevel converter

Abstract

This paper will analyze the power quality of multilevel voltage waveforms generated using three modulation strategies: i) a conventional nearest level control (NLC) strategy, ii) NLC with harmonic elimination, and iii) optimized selective harmonic elimination (OSHE). A uniform sampling frequency of the sinusoidal voltage is considered for NLC modulation. It is found in all selected experimental results that the power quality obtained employing OSHE is higher than the other two modulation techniques.