Design of a novel reliable 9-level switched capacitor-based inverter with low voltage stress on the devices for renewable energy applications

Innovative researchers have unveiled a new design for a nine-level switched capacitor-based inverter that boasts exceptional reliability and low voltage stress on its components, making it ideal for integrating low-voltage renewable energy sources like solar panels and fuel cells. This groundbreaking inverter design employs a modular structure, enabling easy scalability to higher voltage levels, streamlined hardware implementation, and simplified maintenance.

The standout feature of this modular layout is the minimal voltage stress experienced by the switches, which ensures that the stress values remain significantly lower than the peak output voltage. This unique characteristic allows for the use of switches with lower power ratings, thereby reducing overall system costs and power losses.

A noteworthy aspect of the proposed inverter is that the voltages within the switched capacitor circuits exhibit inherent self-voltage balancing, eliminating the need for complex control mechanisms and additional circuitry. To assess the performance of this novel topology, a thorough reliability analysis was carried out. The efficacy of the proposed inverter was verified through both simulation using MATLAB/Simulink and hardware prototyping with a dSPACE Controller.

The maximum efficiency achieved was an impressive 98.4%, confirming its suitability for renewable energy applications.

The research team, consisting of Satya Venkata Kishore Pulavarthi, Chavvakula Naveen Kumar, Katta Bharath, Ch. N. Narasimha Rao, S. Yuvaraja, D. Anil Kumar, and P. Lakshmi Narayana, conducted this study without any financial assistance from external organizations. Their findings, published in the scientific journal "Scientific Reports," are licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, ensuring proper attribution and appropriate usage of the material.