A Novel Common-Ground Multisource Inverter
Deepak Singh, N. Sandeep
Abstract
This letter proposes a novel switched-capacitor (SC) multisource boosting multilevel inverter featuring common ground connection for photovoltaic (PV)-dominated high-frequency ac applications. The proposed topology requires only eight switches, two diodes, and two SCs for generating a nine-level output voltage. The proposed topology has the ability to accommodate two PV sources while ensuring near zero ground leakage current. With the series/parallel technique, the SCs are self-voltage balanced, achieving sensor-less operation. The devised structure has the lowest conduction losses due to reduced number of conducting devices at each level. Furthermore, switching losses are reduced since fewer devices transit at any level as compared to the state-of-the-art topologies. A comprehensive comparative assessment of the proposed topology is carried out and included to highlight its beneficial features against the counterparts. The experimental evaluation of the proposed inverter topology is carried out and the results are presented to validate its feasibility and operability.