Improved performance of IPDPWM CHBMLI based DSTATCOM in a distribution network with induction furnace load

Cascaded H-bridge multilevel inverter (CHBMLI) is based on a series connection of several single-phase inverters which is helpful in raising the output voltage to the desired level. These are also modular in nature as each inverter can be seen as an individual module with similar circuit topology, control structure and modulation [1]. Every converter topology has different switching configurations to achieve the desired output signals. The converter switching needs to be controlled to follow a control reference and modulation strategies are in charge to define the switching control in the converter. The main goal of the modulation algorithm is to synthesize a control reference obtaining a pulse train with the same averaged value. In this work, in-phase disposition pulse width modulation (IPDPWM) and carrier phase-shifted pulse width modulation (CPSPWM) have been applied to CHB 5-level inverter based distribution static compensator (DSTATCOM) to improve the power quality level of a distribution network with induction furnace load [2].