Simulation and experiment of hybrid modulation strategy with common-mode voltage reduction for seven-level hybrid cascaded inverter

Since the development of renewable energy like solar, wind power, the multi-level topologies proved to be more able to apply and control the renewable energy systems. Although, the multi-level inverter generate a common-mode voltage less than the two-level inverter. The common-mode voltage problem still researchers study and solve. This paper will be presented a simple and flexible technique to reduce common-mode voltage for a seven level hybrid cascaded inverter topology. This multilevel inverter topology was established based on five levels H-bridge cascaded inverter. Within, two separated DC sources had the value ratio correlative E/2E. This method also reduces the switching loss and simple to implement in a common processor. Simulation results in Matlab/Simulink and experimental results with R-L load will be reported for validation.