US 11,851,776 B2
Electrolysis device having a converter and method for providing instantaneous reserve power for an AC voltage grid
Andreas Falk, Kassel (DE); and Christian Hardt, Kassel (DE)
Assigned to SMA Solar Technology AG, Niestetal (DE)
Filed by SMA Solar Technology AG, Niestetal (DE)
Filed on Jun. 23, 2021, as Appl. No. 17/355,565.
Application 17/355,565 is a continuation of application No. PCT/EP2019/083382, filed on Dec. 3, 2019.
Claims priority of application No. 10 2018 133 641.1 (DE), filed on Dec. 27, 2018.
Prior Publication US 2021/0317588 A1, Oct. 14, 2021
Int. Cl. C25B 15/02 (2021.01); C25B 9/65 (2021.01); H02M 3/04 (2006.01)
CPC C25B 15/02 (2013.01) [C25B 9/65 (2021.01); H02M 3/04 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for operating an electrolysis device having a converter, which is connected, on an AC voltage side, to an AC voltage grid via a decoupling inductance and draws an AC active power from the AC voltage grid, and an electrolyzer, which is connected to the converter on a DC voltage side, comprising:
operating the electrolysis device, when a grid frequency corresponds to a nominal frequency of the AC voltage grid and is substantially constant over a time period, with an electrical power which is between 50% and 100% of a nominal power of the electrolyzer; and
operating the converter in a voltage-impressing manner, such that the AC active power drawn from the AC voltage grid is changed on the basis of a change and/or a rate of change of the grid frequency in the AC voltage grid.