US 12,438,371 B2
Power supply system and grid connection control method
Fei Xu, Shenzhen (CN); Xinyu Yu, Shanghai (CN); Kai Xin, Shanghai (CN); and Shuchao Wang, Shanghai (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Apr. 3, 2024, as Appl. No. 18/625,478.
Application 18/625,478 is a continuation of application No. PCT/CN2023/100649, filed on Jun. 16, 2023.
Claims priority of application No. 202210887844.7 (CN), filed on Jul. 26, 2022.
Prior Publication US 2024/0250534 A1, Jul. 25, 2024
Int. Cl. H02J 3/16 (2006.01); H02J 3/46 (2006.01); H02M 7/44 (2006.01)
CPC H02J 3/16 (2013.01) [H02J 3/46 (2013.01); H02M 7/44 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power supply system, comprising:
a power supply,
an inverter,
a transformer,
a power station collection module, and
an inverter collection control circuit;
the power supply is connected to the transformer through the inverter, the transformer is connected to a power grid at a grid connection point, one end of the power station collection module is connected to the grid connection point, the other end of the power station collection module is connected to a first end of the inverter collection control circuit, a second end of the inverter collection control circuit is connected between the inverter and the transformer, and a third end of the inverter collection control circuit is connected to the inverter;
the power station collection module is configured to obtain an amplitude value and a frequency of a grid connection voltage at the grid connection point, and obtain a power station power adjustment signal based on the amplitude value and the frequency of the grid connection voltage; and
the inverter collection control circuit is configured to obtain an amplitude value and a frequency of an output voltage of the inverter, obtain an inverter power adjustment signal based on the amplitude value and the frequency of the output voltage, and control, based on the power station power adjustment signal and the inverter power adjustment signal, the inverter to output a target output power.