Converter assembly (GMMC) for connecting an AC grid via transformers (T1, T2) connected in parallel on the primary side, wherein the converter assembly (GMMC) provides a total DC voltage (VDC-G) for supplying electrical energy in the high-voltage range, with series-connected partial converters (TMMC-H, TMMC-F), the partial DC voltages (VDC-H, VDC-F) of which form the total DC voltage (VDC-G) and which each comprise three parallel-connected two-pole phase modules (PM-H, PM-F), each phase module (PM-H, PM-F) being formed from two series-connected converter modules (UM-H, UM-F) that are each connected to one another at a second connection point, which forms one of the phase connections (PA1, PA2, PA3), wherein in each case one transformer (T1, T2) can be connected to the phase connections (PA1, PA2, PA3) of a partial converter (TMMC-H, TMMC-F), wherein the two converter modules (UM-H, UM-F) of the phase modules (PM-H, PM-U) of a first partial converter (TMMC-H) are formed from series-connected unipolar sub-modules (SM-H) and those of a second partial converter (TMMC-F) are formed from series-connected bipolar sub-modules (SM-F), and the first and second partial converters (TMMC-H, TMMC-F) are connected to one another at a first connection point, and wherein the total converter (GMMC) has two drive units (AE-H, AE-F) to regulate the two partial converters (TMMC-H, TMMC-F), said drive units being configured to set a direct current (IDC-G) flowing through the partial converters (TMMC-H, TMMC-F) to a predetermined target value (SW-H, SW-F), one of the drive units being configured to reduce in each case at least the partial DC voltage (VDC-F) of the second partial converter (TMMC-F) when the direct current (IDC-G) exceeds the target value (SW-H, SW-F), the regulator further being configured to invert the partial DC voltage (VDC-F) of the second partial converter (TMMC-F) until the partial DC voltage (VDC-H) of the first partial converter (TMMC-H) is overcompensated for, the inversion of a voltage meaning the production of a voltage having the opposite arithmetic sign. with series-connected partial converters (TMMC-H, TMMC-F), the partial DC voltages (VDC-H, VDC-F) of which form the total DC voltage (VDC-G) and which each comprise three parallel-connected two-pole phase modules (PM-H, PM-F), each phase module (PM-H, PM-F) being formed from two series-connected converter modules (UM-H, UM-F) that are each connected to one another at a second connection point, which forms one of the phase connections (PA1, PA2, PA3), wherein in each case one transformer (T1, T2) can be connected to the phase connections (PA1, PA2, PA3) of a partial converter (TMMC-H, TMMC-F), wherein the two converter modules (UM-H, UM-F) of the phase modules (PM-H, PM-U) of a first partial converter (TMMC-H) are formed from series-connected unipolar sub-modules (SM-H) and those of a second partial converter (TMMC-F) are formed from series-connected bipolar sub-modules (SM-F), and the first and second partial converters (TMMC-H, TMMC-F) are connected to one another at a first connection point, and wherein the total converter (GMMC) has two drive units (AE-H, AE-F) to regulate the two partial converters (TMMC-H, TMMC-F), said drive units being configured to set a direct current (IDC-G) flowing through the partial converters (TMMC-H, TMMC-F) to a predetermined target value (SW-H, SW-F), one of the drive units being configured to reduce in each case at least the partial DC voltage (VDC-F) of the second partial converter (TMMC-F) when the direct current (IDC-G) exceeds the target value (SW-H, SW-F), the regulator further being configured to invert the partial DC voltage (VDC-F) of the second partial converter (TMMC-F) until the partial DC voltage (VDC-H) of the first partial converter (TMMC-H) is overcompensated for, the inversion of a voltage meaning the production of a voltage having the opposite arithmetic sign.