Modeling hybrid modulation strategy with nearest leveled vector switchingpattern in space vector control technique for multilevel inverters

Abstract

The multilevel inverter's impact in the area of power electronics is augmented because of its nimble nature.This paper presents an efficient switching pattern for multilevel inverters using the nearest leveled vector (NLV) strategythrough a space vector control (SVC) technique. The objective is to reduce the total harmonic distortions by generating anoptimal switching sequence with the newly introduced NLV-SVC for multilevel inverters. The proposed NLV modulationis applied for an asymmetrical multilevel inverter, which has a high number of levels with reduced switch count, sources,and lower switching losses. The effectiveness of the proposed method is veri ed on a 27-level 3-cell asymmetrical multilevelinverter. The efficacy of the proposed method in terms of total harmonic distortions is compared with the existing nearestvector control (NVC) modulation strategy. Implementation and experimental veri cation of the proposed NLV-SVCmodulation strategy for an asymmetrical cascaded H-bridge multilevel inverter is presented for real-time validation withthe comparison of the NVC modulation strategy.