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<p>Multilevel inverters (MLIs) are increasingly becoming a critical component in renewable energy applications considering their capacity to yield high-quality power output with minimal harmonic distortion and voltage stress. Single-phase MLIs are a critical component in the advancement of renewable energy systems. They promise high-quality power conversion with a reduced component count and enhanced efficiency. They are a lucrative choice for integration into the global energy infrastructure. A single-phase reduced switch 21-level Asymmetric MLI (Rs21AMLI) for non-conventional energy systems is described in this paper. The proposed Rs21AMLI develops a 21-level output voltage using 9 switches, 4 DC voltage sources and one diode. It promises a very low component count per level factor and cost-effectiveness index, relative to other 21-level MLI topologies. The theoretical analysis of Rs21AMLI provided in this paper is verified and affirmed by the simulation and hardware results. A laboratory setup of 300&#xa0;V, 6A Rs21AMLI with <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="202_2024_2936_Article_IEq1.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="80" /> </InlineMediaObject> <EquationSource Format="TEX">\(50\Omega ,50\,{\rm mH}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>50</mn> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mn>50</mn> <mspace width="0.166667em" /> <mi mathvariant="normal">mH</mi> </mrow> </math></EquationSource> </InlineEquation> RL Load is implemented to demonstrate a 21-level voltage with a minimum harmonic distortion of 4.3% and a maximum efficiency of 97.5%. Modeling of power loss and efficiency of the Rs21AMLI is provided in this paper. A comprehensive comparison of the developed Rs21AMLI with existing 21-level MLIs is also provided to emphasize the advantages of the suggested topology. The Rs21AMLI comparatively has a very low component count per level factor of 1.095, and a very low value of cost-effectiveness index. As a result, it can serve as an interface for a variety of power conversion applications.</p>

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A single-phase reduced switch 21-level asymmetrical multilevel inverter topology for renewable energy systems

  • 期刊论文

  • 发表日期：

    2024年12月31日

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  • V. Aishwarya

摘要

Multilevel inverters (MLIs) are increasingly becoming a critical component in renewable energy applications considering their capacity to yield high-quality power output with minimal harmonic distortion and voltage stress. Single-phase MLIs are a critical component in the advancement of renewable energy systems. They promise high-quality power conversion with a reduced component count and enhanced efficiency. They are a lucrative choice for integration into the global energy infrastructure. A single-phase reduced switch 21-level Asymmetric MLI (Rs21AMLI) for non-conventional energy systems is described in this paper. The proposed Rs21AMLI develops a 21-level output voltage using 9 switches, 4 DC voltage sources and one diode. It promises a very low component count per level factor and cost-effectiveness index, relative to other 21-level MLI topologies. The theoretical analysis of Rs21AMLI provided in this paper is verified and affirmed by the simulation and hardware results. A laboratory setup of 300 V, 6A Rs21AMLI with \(50\Omega ,50\,{\rm mH}\) 50 Ω , 50 mH RL Load is implemented to demonstrate a 21-level voltage with a minimum harmonic distortion of 4.3% and a maximum efficiency of 97.5%. Modeling of power loss and efficiency of the Rs21AMLI is provided in this paper. A comprehensive comparison of the developed Rs21AMLI with existing 21-level MLIs is also provided to emphasize the advantages of the suggested topology. The Rs21AMLI comparatively has a very low component count per level factor of 1.095, and a very low value of cost-effectiveness index. As a result, it can serve as an interface for a variety of power conversion applications.