A review of modulation techniques for hybrid multilevel inverter

This paper presents the overview of modulation methods for hybrid multilevel inverters. Modulation techniques consider modulation index with respect to amplitude and frequency which are to be defined. These modulation techniques can be applied to various multilevel inverters. Some techniques can be applied directly to multilevel inverters while some modifications are required in some techniques for various multilevel inverters. Therefore, a given modulation technique can synthesize several multilevel configurations, significantly increasing flexibility and decreasing total harmonic distortion (THD). The purpose of the modulation techniques presented here is to observe effect of different techniques on different multilevel inverter topology. This paper presents a survey of different modulation techniques for different multilevel inverter for different level output.