US 12,009,783 B2
Fault detection method, fault detection apparatus for photovoltaic module and computer-readable storage medium
Jianqiang Wang, Shanghai (CN); Song Wan, Shanghai (CN); Yanzhong Zhang, Shanghai (CN); Yongbing Gao, Shanghai (CN); and Xinyu Yu, Shanghai (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Sep. 13, 2021, as Appl. No. 17/473,534.
Application 17/473,534 is a continuation of application No. PCT/CN2020/094424, filed on Jun. 4, 2020.
Claims priority of application No. 201910919753.5 (CN), filed on Sep. 26, 2019.
Prior Publication US 2021/0408968 A1, Dec. 30, 2021
Int. Cl. H02H 7/00 (2006.01); H02H 1/00 (2006.01); H02H 7/20 (2006.01); H02S 50/15 (2014.01)
CPC H02S 50/15 (2014.12) [H02H 1/0007 (2013.01); H02H 7/20 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A fault detection method for a photovoltaic module, comprising:
capturing an image of the photovoltaic module in a light emitting state; and
performing detection on the photovoltaic module based on the image when a signal-to-noise ratio of the image is maximized, to identify a fault type of the photovoltaic module;
wherein the photovoltaic module emits light in response to action of power supply equipment;
wherein the fault detection method further comprises:
determining whether the signal-to-noise ratio of the image is maximized; and
when the signal-to-noise ratio of the image is not maximized, sending an adjustment instruction to a power supply equipment to adjust a power supply parameter of the power supply equipment until the signal-to-noise ratio of the image is maximized;
wherein the sending an adjustment instruction to the power supply equipment to adjust a power supply parameter of the power supply equipment comprises: sending the adjustment instruction to the power supply equipment, so that the power supply equipment adjusts the power supply parameter based on a preset curve or a reference curve; and wherein the power supply parameter comprises a current parameter, a voltage parameter, or a power parameter; and corresponding to the power supply parameter, the preset curve is a preset current curve, a preset voltage curve, or a preset power curve; and corresponding to the power supply parameter, the reference curve comprises a current-voltage reference curve, a power-voltage reference curve, or a power-current reference curve.