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Introducing high gain three-phase single-source switched-capacitor (3PS3C) MLI with FCS-MPC for grid-connected PV applications.

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Title: Introducing high gain three-phase single-source switched-capacitor (3PS3C) MLI with FCS-MPC for grid-connected PV applications.
Authors: Yadav, Pankaj Kumar1 (AUTHOR) pnkjkumrydv@gmail.com, Vemuganti, Hari Priya1 (AUTHOR), Biswal, Monalisa1 (AUTHOR)
Source: International Journal of Electronics. Mar2026, Vol. 113 Issue 3, p597-619. 23p.
Subjects: Electric inverters, Simulink (Computer software), Proof of concept, Power capacitors, Capacitor switching
Abstract: The increasing demand for cost-effective and efficient inverters in grid-connected photovoltaic (PV) applications emphasises the need for a three-phase transformerless boost inverter with single/minimised dc source. Although switched capacitor (SC)/series parallel switched capacitor (SPSC) are effective, they face issues like high inrush currents and lack of common dc-link in three-phase applications. Thus, this paper proposes an advanced solution: a single-stage high gain three-phase single-source switched-capacitor (3PS3C) multilevel inverter (MLI) with suppressed inrush charging current by an optimal inductor for grid-integrated PV applications. It ensures self-balancing of dc-link capacitors without a prerequisite using finite control set model predictive control (FCS-MPC). The design achieves four-time voltage boost, minimised total standing voltage (TSV) and complete utilisation of the source. FCS-MPC provides robust performance with reduced computational burden. The proposed inverter is validated through MATLAB/Simulink, hardware prototype and real-time OPAL-RT simulator. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The increasing demand for cost-effective and efficient inverters in grid-connected photovoltaic (PV) applications emphasises the need for a three-phase transformerless boost inverter with single/minimised dc source. Although switched capacitor (SC)/series parallel switched capacitor (SPSC) are effective, they face issues like high inrush currents and lack of common dc-link in three-phase applications. Thus, this paper proposes an advanced solution: a single-stage high gain three-phase single-source switched-capacitor (3PS3C) multilevel inverter (MLI) with suppressed inrush charging current by an optimal inductor for grid-integrated PV applications. It ensures self-balancing of dc-link capacitors without a prerequisite using finite control set model predictive control (FCS-MPC). The design achieves four-time voltage boost, minimised total standing voltage (TSV) and complete utilisation of the source. FCS-MPC provides robust performance with reduced computational burden. The proposed inverter is validated through MATLAB/Simulink, hardware prototype and real-time OPAL-RT simulator. [ABSTRACT FROM AUTHOR]
ISSN:00207217
DOI:10.1080/00207217.2025.2545023