<p>Self-balanced switched-capacitor multilevel inverters (SCMLIs) are promising for solar and wind energy conversion systems, as they enhance power control capability while reducing system complexity and cost. This paper presents a new asymmetric dual-source SCMLI topology with a quinary ratio that produces a 25-level output voltage while inherently maintaining capacitor voltage balance without requiring voltage-balancing algorithms. The proposed SCMLI employs two asymmetrical sources, two capacitors, two diodes, and twelve power semiconductor switches (PSS), where a series–parallel charging–discharging mechanism is utilized to obtain the required voltage levels. A comparative analysis is performed against recently developed 25-level MLI topologies in terms of per unit total standing voltage (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">${\text{T}\text{S}\text{V}}_{\text{p}.\text{u}.}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>TSV</mtext> <mrow> <mtext>p</mtext> <mo>.</mo> <mtext>u</mtext> <mo>.</mo> </mrow> </msub> </math></EquationSource> </InlineEquation>), voltage gain, cost factor, efficiency, and the number of DC voltage sources, diodes, capacitors, gate-drivers, and PSS. The proposed topology achieves a twofold voltage-gain and a <InlineEquation ID="IEq2"> <EquationSource Format="TEX">${\text{T}\text{S}\text{V}}_{\text{p}.\text{u}.}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>TSV</mtext> <mrow> <mtext>p</mtext> <mo>.</mo> <mtext>u</mtext> <mo>.</mo> </mrow> </msub> </math></EquationSource> </InlineEquation> of 5. Simulation studies are conducted in the MATLAB/Simulink environment using the in-phase disposition pulse-width modulation (IPD-PWM) technique, and losses are analyzed using the Piecewise Linear Electrical Circuit Simulation (PLECS) software. Moreover, the proposed SCMLI is validated in real-time through hardware emulation using the Typhoon HIL604 platform. Results from both simulation and real-time testing demonstrate the enhanced efficiency and practical viability of the proposed topology compared to existing multilevel inverter designs.</p>

Self-balanced switched-capacitor multilevel inverter with quinary ratio of asymmetry featuring voltage boosting capability

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发表日期：

2026年8月4日

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Mohit Jain,
A. N. Tiwari,
A. K. Pandey,
S. M. Tripathi

摘要

Self-balanced switched-capacitor multilevel inverters (SCMLIs) are promising for solar and wind energy conversion systems, as they enhance power control capability while reducing system complexity and cost. This paper presents a new asymmetric dual-source SCMLI topology with a quinary ratio that produces a 25-level output voltage while inherently maintaining capacitor voltage balance without requiring voltage-balancing algorithms. The proposed SCMLI employs two asymmetrical sources, two capacitors, two diodes, and twelve power semiconductor switches (PSS), where a series–parallel charging–discharging mechanism is utilized to obtain the required voltage levels. A comparative analysis is performed against recently developed 25-level MLI topologies in terms of per unit total standing voltage ( ${\text{T}\text{S}\text{V}}_{\text{p}.\text{u}.}$ ${TSV}_{p . u .}$ ), voltage gain, cost factor, efficiency, and the number of DC voltage sources, diodes, capacitors, gate-drivers, and PSS. The proposed topology achieves a twofold voltage-gain and a ${\text{T}\text{S}\text{V}}_{\text{p}.\text{u}.}$ ${TSV}_{p . u .}$ of 5. Simulation studies are conducted in the MATLAB/Simulink environment using the in-phase disposition pulse-width modulation (IPD-PWM) technique, and losses are analyzed using the Piecewise Linear Electrical Circuit Simulation (PLECS) software. Moreover, the proposed SCMLI is validated in real-time through hardware emulation using the Typhoon HIL604 platform. Results from both simulation and real-time testing demonstrate the enhanced efficiency and practical viability of the proposed topology compared to existing multilevel inverter designs.