Recent trends and review onswitched‐capacitor‐basedsingle‐stageboost multilevel inverter

Abstract

Summary Multilevel inverters are very popular in renewable energy applications. These inverters produce output voltages close to sinusoidal and have lower harmonics as compared to the conventional two‐level inverters as it also helps in reducing the size of the filter, thus makes the circuitry less complicated. In conventional multilevel inverter topologies, the number of devices increases with the increase of the number of output voltage levels, which in turn makes circuitry bulky and costly. Further, the boosting feature of the input voltage is also necessary for the application of multilevel inverters with renewable energy. Therefore, to reduce the count of devices, losses, and rating of devices, various switched‐capacitor multilevel inverter topologies are proposed. Switched‐capacitor multilevel inverter topologies (SCMLIs) can generate multiple voltage levels along with high voltage gain with a minimum number of devices. This paper gives a detailed overview of the recently introduced SCMLIs. The different SCMLIs have been categorized based on the number of levels and voltage gains. A detailed comparison has been introduced in this paper. Finally, few SCMLI topologies have been experimentally validated using the experimental results.

Multilevel Inverter: A Survey on Classical and Advanced Topologies, Control Schemes, Applications to Power System and Future Prospects

“…(ii) asymmetric type based on the use of unequal DC sources [69,70,[81][82][83][84][85]; (iii) having inherent negative level [68][69][70][81][82][83][84][85]; (iv) without inherent negative level [72][73][74][75][76][77][78][79][80]; (v) use of capacitors links with single sources [81][82][83][84][85][86]; (vi) regenerative configuration for operation as both an inverter and a rectifier [73][74][75] and (vii) hybrid approach of NPC, FC and CHB [84][85][86][87].…”

Analysis and implementation of a new asymmetric double H‐bridge multilevel inverter

“…Similarly, some other reduced switch countbased topologies have been reported in other works [11][12][13][14][15][16][17][18] ; however, in all these topologies, at least two switches need to withstand the maximum output voltage. In other studies, [19][20][21] several reduced switch count-based inverter topologies have been presented. In Siddiquie et al, 19 the switched-capacitor-based concept has been used; however, the use of capacitor reduces the high power application due to the requirement of high-value capacitor.…”

“…In Siddiquie et al, 19 the switched-capacitor-based concept has been used; however, the use of capacitor reduces the high power application due to the requirement of high-value capacitor. In Bana et al and Kumari et al, 20,21 a detailed review of reduced switch count-based topologies has been provided.…”

Operation, analysis, and implementation of a reduced device count asymmetrical multilevel inverter

“…Till now, many new MLI topologies have been reported by the investigators working in this area. Some of them are discussed in previous works 4–6 . Samadaei et al have discussed novel modules for asymmetrical MLIs in literature 7,8 .…”