US 12,438,364 B2
Method for operating an energy supply system, device for exchanging electrical power in an energy supply system, and energy supply system
Marcel Kratochvil, Kassel (DE); and Alexander Unru, Baunatal (DE)
Assigned to SMA Solar Technology AG, Niestetal (DE)
Filed by SMA Solar Technology AG, Niestetal (DE)
Filed on Dec. 20, 2023, as Appl. No. 18/389,971.
Application 18/389,971 is a continuation of application No. PCT/EP2022/066688, filed on Jun. 20, 2022.
Claims priority of application No. 10 2021 116 418.4 (DE), filed on Jun. 24, 2021.
Prior Publication US 2024/0162705 A1, May 16, 2024
Int. Cl. H02J 1/00 (2006.01); H02J 3/38 (2006.01); H02J 5/00 (2016.01)
CPC H02J 1/002 (2020.01) [H02J 3/38 (2013.01); H02J 5/00 (2013.01); H02J 2300/26 (2020.01)] 17 Claims
OG exemplary drawing
 
1. A method for operating an energy supply system having at least one energy generation unit, comprising:
exchanging power between a first DC unit and an AC bus using a first power converter, wherein a first DC power of the first DC unit is converted into a first AC power using the first power converter and vice versa,
exchanging power between a second DC unit and the AC bus using a second power converter, wherein a second DC power of the second DC unit is converted into a second AC power using the second power converter and vice versa,
combining the first AC power and the second AC power into an AC bus power of the AC bus,
transmitting the AC bus power using a transformer,
exchanging power between the AC bus and a DC grid using a third power converter, wherein the AC bus power transmitted by the transformer is converted using the third power converter into a DC grid power and vice versa,
wherein at least the first DC unit comprises an energy generation unit comprising at least one PV generator,
wherein a frequency and an amplitude of an AC voltage or of an AC current on the AC bus are set, wherein the third power converter sets the frequency on the AC bus as a function of the DC grid power and, for setting the AC voltage or the AC current, sets the DC grid power as a function of the AC bus power.