A New High Step-up Switched Capacitor Based Seven Level Grid-Tied Inverter

In this paper, a new switched capacitor based seven level grid-tied inverter is proposed. The proposed switched capacitor based inverter can generate a seven-level output voltage waveform using a single dc-source, eleven unidirectional power switches, and three capacitors. The used capacitors are charged from the input dc source by turning on appropriate switching states, directly. In order to highlight the advantages of the proposed inverter, the proposed topology is compared with some other presented topologies. This comparison indicates that the proposed inverter need lower number of the circuit elements and are most cost effective as compared to other compared topologies. The operation modes and the charging and discharging modes of the utilized capacitors of the proposed inverter are presented in detail. In order to verify the accurate performance of the proposed seven-level grid-tied inverter, the simulation results have been obtained by MATLAB/Simulink software and presented.