METHOD FOR OPERATING A BATTERY CONVERTER, BATTERY CONVERTER AND SYSTEM

A method for operating a battery converter in a system includes controlling an exchange power of the battery converter using a battery, which is connected to the battery converter, depending on a voltage of the intermediate circuit in accordance with a converter characteristic curve, identifying a decrease in the intermediate circuit voltage below a rectifying value of the permissible AC voltage of the grid connected to the inverter, and when the decrease is identified, temporarily shifting the converter characteristic curve so that a maximum discharging power of the battery converter is reached at a value of the intermediate circuit voltage that is above or at the rectifying value. A battery converter and a system having such a battery converter are also described.