A Novel Nine-Level Common Ground Type Switched Capacitor Boosting Multilevel Inverter for Renewable Energy Applications

Abstract

This article introduces a nine-level common ground switched capacitor multilevel inverter design (9L CG SCMLI) that can self-balance its voltage and enhance its voltage by a factor of four. The suggested inverter design has a single direct current supply, three capacitors, three diodes, and nine switches. The proposed topology gets rid of ground leakage current with its common ground characteristic. Many metrics, including component count, total voltage stress, cost function, and efficiency, have been used to assess the suggested topology. The components can withstand voltage stresses up to the peak output voltage, or even lower. Switching pulses for the suggested topology is governed by the level-shifted pulse width modulation technique. The efficiency of the suggested switched capacitor multilevel inverter (SCMLI) was tested under several loading and modulation index circumstances through power loss analysis using piecewise linear electrical circuit simulation (PLECS) software. The findings demonstrate that the suggested SCMLI attains a maximum efficiency of 97.99%. In addition, a reliability study is conducted to determine the expected lifespan of the suggested SCMLI. The findings of the simulation are validated through an experimental prototype under various scenarios.

Cite this article as: M. Tufail, M. M. Shadab, M. Zaid and A. Sarwar, “A novel nine-level common ground type switched capacitor boosting multilevel inverter for renewable energy applications,” Electrica, 2026, 26, 0273, doi: 10.5152/electrica.2026.25273.