Common Ground Nine-Level Boost Inverter for Grid-Connected PV Applications

The article discusses a nine-level switching capacitor-based common ground-type boost inverter for grid-connected photovoltaic applications. proposed structure’s direct connection between the negative terminal of input source and grid neutral eliminates leakage current. topology uses eleven switches, two diodes, three capacitors to produce double voltage with nine different levels. Self-balancing eliminate need sophisticated independent control algorithms. maximum stress on one equals voltage, while it is equal half other switched capacitors. various modes operation capacitance calculation are discussed in depth. A comprehensive comparison topologies has been conducted terms total component count, standing capacitor approximate cost demonstrate topology’s benefits. 400-W prototype constructed, experimental findings under operating situations reviewed.