The Modular multilevel converter has become an attractive option for dc/ac conversion in many

power system applications in particular for HVDC transmission, due to its parallel arrangement of

phase legs the MMC is known to be wye configured architecture. In this modular converter

application used then of conventional converter the delta configured MMC enable by series-stacking

phase legs is on alternative realization to wye configured MMC and has significantly different

characterized. MMC enable greater flexibility in converter voltage/current scaling for given set submodule

and may be applying option for dc/ac application requiring a power tap-off a high

voltage dc rail.-The Modular multilevel converter has become an attractive option for dc/ac conversion in many

power system applications in particular for HVDC transmission, due to its parallel arrangement of

phase legs the MMC is known to be wye configured architecture. In this modular converter

application used then of conventional converter the delta configured MMC enable by series-stacking

phase legs is on alternative realization to wye configured MMC and has significantly different

characterized. MMC enable greater flexibility in converter voltage/current scaling for given set submodule

and may be applying option for dc/ac application requiring a power tap-off　a high

voltage dc rail.