Common Ground based Transformer-less High Gain Basic Switched Boost Inverter

Abstract

The impedance source inverter has features of single-stage conversion, boosting capability, and shoot-through (ST) immunity. Hence, they are widely used and outperform the conventional voltage and current source inverters. It is a known fact that a leakage current flows in the network due to a common ground issue. This poses an electrical safety risk in solar photovoltaic systems. This paper proposes a common ground-based high gain basic switched boost inverter (SBI) topology. The topology includes a common ground from the source to the load that leads to leakage current elimination. It can buck/boost the input voltage to the desired voltage level. The detailed functioning of the proposed configuration and steady-state analysis are presented. The MATLAB Simulink software is used to assess the proposed SBI operation and analyze results. To validate the performance of the proposed SBI, the simulation results are compared with the values derived from the mathematical formulation. The results elucidate that the proposed inverter configuration has higher gain, Modulation index (MI), and less switching stress across switches as compared to a basic SBI.