Abstract: This work presents the design, analysis, and development of switched-capacitor-based common-ground multilevel inverter topologies for renewable energy applications. The proposed inverter topologies achieve simultaneous voltage boosting and multilevel voltage synthesis without the use of magnetic components, while effectively eliminating leakage current in transformerless photovoltaic systems through the common-ground feature. Inverter topologies with different voltage gains and output voltage levels are developed to achieve improved voltage gain, reduced component count, lower device voltage stress, and enhanced power density. A comprehensive comparative analysis with existing topologies is carried out in terms of voltage gain, component count, capacitor requirements, total standing voltage, average number of conducting devices, maximum blocking voltage, and cost factor. The performance of the proposed inverter topologies is validated through simulation and experimental investigations under both standalone and grid-connected operating conditions. The results demonstrate high voltage gain, inherent capacitor self-balancing capability, reduced voltage stress, and low total standing voltage. The proposed topologies provide compact, efficient, and cost-effective solutions for transformerless grid-connected photovoltaic applications.

Event Details
Title: Design and Topological Development of Switched-Capacitor-Based Multilevel Inverters for Renewable Energy Applications(PhD viva voce)
Date: July 01, 2026 at 12:00 PM
Venue: Google Meet (https://meet.google.com/cpm-qwna-udk)
Speaker: Mr. Ajit Kumar Upadhiya (EE20D750)
Guide: Dr. Lakshminarasamma N
Type: PHD seminar

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