Title: Design, Engineering and Optimization of a Grid-Tie Multicell Inverter for Energy Storage Applications,
Abstract: Multilevel converters have found many applications within renewable energy
systems thanks to their unique capability of generating multiple voltage
levels. However, these converters need multiple DC sources and the voltage
balancing over capacitors for these systems is cumbersome. In this work, a new
grid-tie multicell inverter with high level of safety has been designed,
engineered and optimized for integrating energy storage devices to the electric
grid. The multilevel converter proposed in this work is capable of maintaining
the flying capacitors voltage in the desired value. The solar cells are the
primary energy sources for proposed inverter where the maximum power density is
obtained. Finally, the performance of the inverter and its control method
simulated using PSCAD/EMTDC software package and good agreement achieved with
experimental data.