Title:
GRID CONNECTION CONTROL METHOD, APPARATUS, AND SYSTEM FOR ENERGY STORAGE APPARATUS, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2024/092411
Kind Code:
A1
Abstract:
Embodiments of the present application relate to the technical field of energy storage, and provided thereby are a grid connection control method for an energy storage apparatus, an energy storage control unit, an energy storage apparatus, an energy storage system, and a storage medium. The method comprises: when grid connection is started, controlling a main energy transmission line to be connected to a direct-current bus and controlling energy storage units to be disconnected from corresponding rectifier circuits, such that a power system pre-charges grading capacitors; and when it is determined that a pre-charging completion condition of each grading capacitor is satisfied, according to a first control policy, controlling the energy storage unit of an energy storage sub-module to be in communication with the corresponding rectifier circuit to perform pre-charging processing, and when it is determined that an energy storage charging condition is satisfied, according to a second control policy, controlling the energy storage unit of each energy storage sub-module to be in communication with the corresponding rectifier circuit to perform charging processing. The embodiments of the present application can effectively reduce instantaneous impulse currents and voltage generated during a grid connection process, so that a charging process is more stable, smooth grid connection can be ensured, and the reliability and safety of grid connection can be improved.
Inventors:
LU YANHUA (CN)
YU DONGXU (CN)
LUO BINGTUAN (CN)
YU DONGXU (CN)
LUO BINGTUAN (CN)
Application Number:
PCT/CN2022/128634
Publication Date:
May 10, 2024
Filing Date:
October 31, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX FUTURE ENERGY RES INSTITUTE SHANGHAI LIMITED (CN)
International Classes:
H02J3/32
Foreign References:
| CN108306320A | 2018-07-20 | |||
| CN104467016A | 2015-03-25 | |||
| CN104300777A | 2015-01-21 | |||
| US20120200162A1 | 2012-08-09 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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