Regulating method for a decentralized energy generating system, and decentralized energy generating system

The invention relates to a method for regulating a decentralized energy generating system with a plurality of inverters (IN), the feed-in of which into a grid (2) is determined by being actuated by a central control unit (PPC). The central control unit (PPC) detects the active power, the reactive power, and the voltage amplitude at a grid connection point (PCC) of the energy generating system (1). In a normal operating mode of the energy generating system (1), the central control unit (PPC) regulates the reactive power and the active power to target values specified by a grid operator in that the central control unit (PPC) divides the specified target values into individual target settings for the plurality of converters (IN) and communicates the individual target settings to the converters (IN). A switchover to a special operating mode of the energy generating system is carried out if the three following criteria are present at the grid connection point (PCC) in a specified time interval: - a lowering of the voltage amplitude by more than a specified first threshold; - an active power increase by more than a specified second threshold; and - a reactive power change which does not exceed a specified third threshold in the direction of an under-excitation. In the special operating mode, the central control unit (PPC) produces a reduction of the active power provided at the network connection point (PCC) compared to the specified target values. The invention likewise relates to a corresponding decentralized energy generating system (1).