| Abstract |
This paper proposes a harmonic balancing based approach to deal with the equalization process of thecapacitors stored energies in the six legs of a three-phase Multi Modular Converter (MMC) serving as theactive interface between an AC grid and a HVDC link. Indeed, the harmonic balancing control, applied tothe converter energies status variables written in a special form by exploiting the Space Vector/ZeroComponent and Common/Differential Mode decompositions, allows to highlight all the viable controllableinteractions able to constrain the MMC stored energies to the desired balanced status. The conceived voltagecontrol strategy is validated by an extensive numerical simulation. |
