Multilevel converter with energy storage

A multilevel power converter comprising:

• at least one phase leg, the at least one phase leg comprising a plurality of cascaded chain link connected cells, each of the plurality of cascaded chain link connected cells comprising a capacitor and two semiconductor switches in series, each with an anti-parallel connected diode,
• wherein the plurality of cascaded chain link connected cells comprises first and second cells forming a mirrored cell-pair such that the two semiconductor switches of each of the first and second cells are all connected in series with each other, and
• wherein the converter further comprises a first energy storage connected such as to allow the first energy storage to connect over either one or both of the cell capacitors of the first and second cells by means of switches.