US 12,413,067 B2
Rapid turnoff method, photovoltaic assembly turnoff device, and photovoltaic system
Yu Yang, Hefei (CN); Yanfei Yu, Hefei (CN); Xinyu Wang, Hefei (CN); and Jun Xu, Hefei (CN)
Assigned to Sungrow Power Supply Co., Ltd., Hefei (CN)
Appl. No. 17/915,396
Filed by Sungrow Power Supply Co., Ltd., Hefei (CN)
PCT Filed Mar. 8, 2021, PCT No. PCT/CN2021/079465
§ 371(c)(1), (2) Date Sep. 28, 2022,
PCT Pub. No. WO2021/208632, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 202010297765.1 (CN), filed on Apr. 16, 2020.
Prior Publication US 2023/0126969 A1, Apr. 27, 2023
Int. Cl. H02H 7/20 (2006.01); H02H 1/00 (2006.01)
CPC H02H 7/20 (2013.01) [H02H 1/0007 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A rapid shutdown method, comprising:
receiving a starting signal by a shutdown device in a photovoltaic system, wherein the shutdown device is for a photovoltaic module;
controlling, by the shutdown device, the shutdown device to be turned on, wherein the shutdown device being on enables the photovoltaic module connected to the shutdown device to output power;
determining, by the shutdown device, whether there is a fault in an inverter channel of the photovoltaic system through detecting a status parameter of the shutdown device, wherein the inverter channel corresponds to the shutdown device;
controlling, by the shutdown device, the shutdown device to be turned off in response to there being the fault in the inverter channel, wherein the shutdown device being off stops the photovoltaic module connected to the shutdown device outputting power; and
maintaining, by the shutdown device, the shutdown device being on, in response to there being no fault in the inverter channel;
wherein determining, by the shutdown device, whether there is the fault in the inverter channel in the photovoltaic system comprises:
determining, by the shutdown device, whether the status parameter is subject to dynamic variations;
determining, by the shutdown device, that there is no fault in the inverter channel in response to the status parameter being subject to the dynamic variations; and
determining, by the shutdown device, that there is the fault in the inverter channel in response to the status parameter being not subject to dynamic variations.