Method for operating an internal combustion engine coupled with a generator

Method for operating an internal combustion engine (2) coupled to a generator (1) in the event of a grid fault in an electrical supply network (3) connected to the generator (1), in particular in the event of a dynamic grid voltage dip, wherein the internal combustion engine (2) comprises a turbocharger (4) which has a compressor (5) in an air supply line (6) of the internal combustion engine (2) and an exhaust gas turbine (7) coupled to the compressor (5) in an exhaust line (8) of the internal combustion engine (2), wherein at least one bypass valve (9, 10) is provided for bypassing the compressor (5) and/or for bypassing the exhaust gas turbine (7), wherein upon or after detection of the grid fault, the at least one bypass valve (9, 10) is actuated at least temporarily.