| 摘要 |
In order to operate a transformerless inverter (1), which is connected on the input side to a generator and on the output side to a polyphase AC grid (3), has a polyphase inverter bridge (5), and comprises a switch (35, 36) between a center point (12) of the input-side DC link (4) and a connection (32) for a neutral conductor (33) of a polyphase AC grid (3), when first operating conditions are present, electric power is fed into the AC grid (3) from the DC link (4) when the switch (35, 36) with the inverter bridge (5) is closed. During a transition from the first operating conditions to second operating conditions which differ from the first operating conditions, the switch (35, 36) is opened, while during a transition from the second operating conditions to the first operating conditions, the switch (35, 36) is closed. When the second operating conditions are present, electric power is fed into the AC grid (3) from the DC link (4) when the switch (35, 36) with the inverter bridge (5) is open. |
