A generalized transformerless switched-capacitor inverter for photovoltaic application

A new common ground transformerless inverter topology based on the switched-capacitor concept has been introduced in the proposed article. In the proposed design, ten switches, two capacitors, and a single DC source are used to enhance the output voltage to double that of the supply voltage by using a single DC source. The technique of common ground connection, in which the negative terminal of the photovoltaic modules is directly connected to the neutral point of the utility grid, is used to prevent leakage current. Furthermore, the topology description, the operating principle of the various states, and the computation of capacitance are all thoroughly investigated. To ensure that the proposed topology executes smoothly at all times, a level shift pulse width modulation technique is adopted. As an additional benefit of the suggested topology, detailed comparison evaluations are offered to highlight the advantages of the proposed topology. The proposed work has been carried out to establish the practicality of the proposed topology by modeling and conducting experimental tests on a five-level structure.