US 11,984,800 B2
Power supply system and control method for power supply system
Xinyu Yu, Shanghai (CN); Kai Xin, Shanghai (CN); and Junjie Li, Shanghai (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Mar. 11, 2022, as Appl. No. 17/693,221.
Claims priority of application No. 202110269739.2 (CN), filed on Mar. 12, 2021.
Prior Publication US 2022/0294336 A1, Sep. 15, 2022
Int. Cl. H02M 1/32 (2007.01); H02M 7/44 (2006.01); H02J 3/38 (2006.01)
CPC H02M 1/32 (2013.01) [H02M 7/44 (2013.01); H02J 3/381 (2013.01); H02J 2300/24 (2020.01)] 15 Claims
OG exemplary drawing
 
1. A power supply system, comprising:
a direct current voltage conversion apparatus;
an inverter; and
a diode;
wherein the direct current voltage conversion apparatus comprises a controller and a direct current voltage conversion circuit, wherein the controller is configured to control the direct current voltage conversion circuit to receive electric energy from a power generation module, perform direct current conversion, and output a voltage to the inverter through a direct current bus after performing direct current conversion;
wherein the inverter is configured to receive the output voltage of the direct current voltage conversion circuit through the direct current bus, convert direct current power into alternating current power, and supply power to a power grid after converting the direct current power into the alternating current power;
wherein the diode is connected in series to the direct current bus, wherein the diode is turned on based on the direct current voltage conversion circuit outputting electric energy, and is cut off based on the direct current voltage conversion circuit receiving electric energy;
wherein the controller is further configured to:
control the output voltage of the direct current voltage conversion circuit such that the diode is turned on; and
detect, based on the voltage on the direct current bus, whether high voltage ride-through occurs in the power supply system.