US 12,267,041 B2
Power electronic device on direct-current side of photovoltaic system, and test system and control method therefor
Yu Yang, Hefei (CN); Qiaodi Chen, Hefei (CN); Yuqi Peng, Hefei (CN); and Jun Xu, Hefei (CN)
Assigned to Sungrow Power Supply Co., Ltd., Hefei (CN)
Appl. No. 17/921,950
Filed by Sungrow Power Supply Co., Ltd., Hefei (CN)
PCT Filed Oct. 30, 2020, PCT No. PCT/CN2020/125107
§ 371(c)(1), (2) Date Oct. 27, 2022,
PCT Pub. No. WO2022/032884, PCT Pub. Date Feb. 17, 2022.
Claims priority of application No. 202010806655.3 (CN), filed on Aug. 12, 2020.
Prior Publication US 2023/0179146 A1, Jun. 8, 2023
Int. Cl. H02S 50/10 (2014.01); H02J 1/10 (2006.01)
CPC H02S 50/10 (2014.12) [H02J 1/102 (2013.01); H02J 2300/24 (2020.01)] 14 Claims
OG exemplary drawing
 
1. A power electronic device on a direct-current side of a photovoltaic system, wherein the power electronic device is configured to:
detect a fluctuation of an electrical signal parameter at an input terminal of the power electronic device; and
switch, in response to the fluctuation meeting a preset condition, from a limited output state to a non-limited output state, wherein
the fluctuation of the electrical signal parameter at the input terminal of the power electronic device is generated by disturbance applied to the input terminal of the power electronic device by a direct-current power supply with disturbance output.