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

A method for regulating a decentralized energy generating system with a plurality of inverters (IN), the infeed of which into a grid is determined by driving by means of a central control unit (PPC), the method comprising:

• receiving at the PPC a detected active power, reactive power and voltage amplitude at a grid connection point (PCC) of the energy generating system;
• and
• regulating, in a normal operating mode of the energy generating system, the reactive power and the active power to target values stipulated by a grid operator by virtue of the central control unit (PPC) dividing the stipulated target values into individual target stipulations for the plurality of inverters (IN) and communicating individual target stipulations to the inverters (IN);
• and
• selectively changing to a special operating mode of the energy generating system if the following three criteria are present at the grid connection point (PCC) in a stipulated time interval:
• a decrease in the voltage amplitude by more than a stipulated first threshold value;
• an active power increase by more than a stipulated second threshold value;
• and
• a reactive power change which does not exceed a stipulated third threshold value in the direction of an underexcitation,
• wherein, in the special operating mode, the central control unit (PPC) effects a reduction of the active power provided at the grid connection point (PCC) compared to the stipulated target values.