US 12,003,109 B2
Direct-current coupling hydrogen production system and control method therefor
Yu Gu, Hefei (CN); Jiangsong Li, Hefei (CN); Jian Guo, Hefei (CN); and Jun Xu, Hefei (CN)
Assigned to Sungrow Power Supply Co., Ltd., Hefei (CN)
Appl. No. 17/792,693
Filed by Sungrow Power Supply Co., Ltd., Hefei (CN)
PCT Filed Mar. 8, 2021, PCT No. PCT/CN2021/079471
§ 371(c)(1), (2) Date Jul. 13, 2022,
PCT Pub. No. WO2021/248946, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 202010533744.5 (CN), filed on Jun. 12, 2020.
Prior Publication US 2023/0041986 A1, Feb. 9, 2023
Int. Cl. H02J 3/00 (2006.01); H02J 3/38 (2006.01)
CPC H02J 3/381 (2013.01) [H02J 2300/24 (2020.01); H02J 2300/28 (2020.01)] 15 Claims
OG exemplary drawing
 
1. A direct-current coupling hydrogen production system, comprising: at least one electricity generation system and a plurality of hydrogen production electrolyzer systems, wherein
the at least one electricity generation system each comprises: a controller, N renewable energy systems, a plurality of conversion systems and a power switching unit, and N is an integer greater than 1;
the plurality of conversion systems and the power switching unit each are arranged on an electrical energy transmission path from the N renewable energy systems to M hydrogen production electrolyzer systems, and M is an integer greater than 1;
the power switching unit comprises N input ports and M output ports; and
the controller is configured to:
acquire a maximum power point tracking MPPT value of each of the conversion systems;
determine a to-be-operated hydrogen production electrolyzer system among the M hydrogen production electrolyzer systems based on all the MPPT values and a minimum startup electrical parameter of a hydrogen production electrolyzer system; and
control the power switching unit to supply electrical energy to the to-be-operated hydrogen production electrolyzer system for hydrogen production, so that electrical energy received by each to-be-operated hydrogen production electrolyzer system is sufficient for hydrogen production, and all the to-be-operated hydrogen production electrolyzer system operates independently.