Looking for a way to improve solar PV grid connections and eliminate leakage current? This paper proposes an integrated common ground-based grid-connected current-fed switched inverter designed to address issues associated with galvanic isolation in solar PV systems. The design utilizes a common ground between the DC source and the AC grid, effectively eliminating leakage current and improving immunity to common-mode voltage variations. The inverter also utilizes a shoot-through state to boost input voltage and achieve the rated AC output voltage. Compared to other common ground-based inverters, this design uses fewer passive reactive elements and active switches. This leads to a reduction in system size, cost, and associated power loss. With its continuous input current and buck-boost capabilities, the proposed inverter is particularly suited for solar PV applications. Steady-state analysis and simulation results validate the inverter’s performance, highlighting its potential for efficient and reliable grid integration.
This paper exploring inverter design aligns with the International Journal of Circuit Theory and Applications' focus on advances in electrical engineering and circuit theory. The research contributes to the journal’s scope by proposing a novel solution to address issues in solar PV grid-connected systems, an area of increasing importance. The study's emphasis on improving efficiency and reducing system complexity is consistent with the journal's goal of showcasing innovative applications of circuit theory.