A new single input common ground seven level triple boost switched capacitor based inverter

This paper proposes a new 7-L switched capacitor-based inverter suitable for use in photovoltaic applications. Most conventional inverters not only can't enhance the input voltage level with a single input source, but also require an isolated input source due to the problems of leakage current of solar panels. Therefore, the presented converter is employed to increase the voltage level of the input with switched capacitor cells; consequently, the seven-level inverter can be achieved with a single input source. Additionally, the proposed topology, due to the common ground between the input source and the load, reduces the differential mode and common mode voltages, thereby decreasing the leakage current of solar panels. Otherwise, this current increases the harmonic content of the output waveform, and necessitates a larger output filter size. To verify the accuracy of the claims, a 300 W laboratory prototype of the proposed inverter is tested, and simulation results carried out in PSCAD/EMTDC are provided as well. The overall theoretical efficiency is about 97.44%. Finally, the proposed inverter is compared with other states of the art.