The German grid code requires a specific export control called “Einspeisebegrenzung”.

The grid operator can specify the connected load feed-in. If the connected load exceeds, the generating unit must reduce its output and, in addition, the generating unit is disconnected from the grid if the limit values exceed the specification.

Reconnection takes place according to the same criteria as after a grid failure (grid voltage/frequency in the range and grid settling time has expired).

Please find attached a more detailed pdf description on how to solve it.