| 摘要 |
In order to transmit electrical energy between a DC voltage system and an at least n-phase AC voltage system, a power converter (10) is provided and comprises an n-phase transformer (20) and a power converter circuit (12) with n MMC modules (30), wherein the number n is at least three. The MMC modules (30) are connected in series. The power converter (10) comprises decoupling capacitors (16) for supplying electrical energy to the transformer (20) and/or for removing electrical energy from the transformer (20). Each winding (21) of a first side (21s) of the transformer (20) forms a series circuit (17) with each of the decoupling capacitors (16), wherein each of the series circuits (17) is connected in parallel with each of the MMC modules (30). Operating methods (100, 200) for converting a DC voltage (UDC) into an at least three-phase AC voltage (U22, U22', U22'') and for converting an at least three-phase AC voltage (U22, U22', U22'') into a DC voltage (UDC) are also provided. |
