Title:
GRID-CONNECTION CONTROL METHOD FOR ENERGY STORAGE APPARATUS, AND UNIT, SYSTEM AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2024/092557
Kind Code:
A1
Abstract:
The present application relates to the technical field of energy storage. Provided are a grid-connection control method for an energy storage apparatus, and an energy storage control unit, an energy storage system and a storage medium. The method comprises: in a state where a main energy transmission line is disconnected from a direct-current bus, sequentially controlling energy storage units of energy storage sub-modules to connect to corresponding grading capacitors, such that the energy storage units pre-charge the corresponding grading capacitors (201); and when the grading capacitors of the energy storage sub-modules meet a grading capacitor pre-charging completion condition, controlling the main energy transmission line to connect to the direct-current bus (202). The method can effectively reduce an instantaneous impulse current and an instantaneous impulse voltage, which are generated during a grid-connection process, such that the charging process is more stable, smooth grid-connection can be ensured, and the reliability and safety of grid connection of an energy storage apparatus are improved.
Inventors:
LU YANHUA (CN)
YU DONGXU (CN)
LUO BINGTUAN (CN)
YU DONGXU (CN)
LUO BINGTUAN (CN)
Application Number:
PCT/CN2022/129263
Publication Date:
May 10, 2024
Filing Date:
November 02, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX FUTURE ENERGY RES INSTITUTE SHANGHAI LIMITED (CN)
International Classes:
H02J3/38
Foreign References:
| CN112542893A | 2021-03-23 | |||
| CN114597954A | 2022-06-07 | |||
| CN109327050A | 2019-02-12 | |||
| CN111181207A | 2020-05-19 | |||
| US20160241070A1 | 2016-08-18 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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