US 11,677,247 B2
Regulating method for a decentralized energy generating system, and decentralized energy generating system
Daniel Premm, Kaufungen (DE); Cornelius Fuetterer, Gernrode (DE); and Oliver Glitza, Kassel (DE)
Assigned to SMA Solar Technology AG, Niestetal (DE)
Filed by SMA Solar Technology AG, Niestetal (DE)
Filed on Jan. 3, 2022, as Appl. No. 17/567,373.
Application 17/567,373 is a continuation of application No. 17/007,435, filed on Aug. 31, 2020, granted, now 11,217,997.
Application 17/007,435 is a continuation of application No. PCT/EP2019/054187, filed on Feb. 20, 2019.
Claims priority of application No. 10 2018 104 666.9 (DE), filed on Mar. 1, 2018.
Prior Publication US 2022/0140612 A1, May 5, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 3/38 (2006.01); H02J 3/16 (2006.01); H02J 3/46 (2006.01)
CPC H02J 3/381 (2013.01) [H02J 3/16 (2013.01); H02J 3/46 (2013.01); H02J 2300/20 (2020.01); H02J 2300/24 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A method for regulating a decentralized energy generating system with a plurality of inverters (IN), wherein a infeed of energy into a grid is determined by 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 decentralized energy generating system; and
regulating, in a normal operating mode of the decentralized energy generating system, the reactive power and the detective active power to target values; and
reducing, in a special operating mode of the decentralized energy generating system, an active power at the PCC when the following three criteria are satisfied at the PCC in a predetermined time interval:
a decrease in the voltage amplitude by more than a predetermined first threshold value;
an active power increase by more than a predetermined second threshold value; and
a reactive power change which does not exceed a predetermined third threshold value.