Modeling and simulation of cascaded H-bridge multilevel inverter with active front end

摘要

The paper presents detailed modeling and simulation of cascaded H-bridge multilevel inverter with active front end (AFE). The purpose of the AFE is to balance the DC bus voltage and put the returning power back to the source instead of the breaking chopper and the capacitor. A simulation model has been built to demonstrate the inverter system and the simulation result validate the proposed control method.