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Title:
PHOTOVOLTAIC MODULE ABNORMALITY DETECTION METHOD AND SYSTEM, AND PHOTOVOLTAIC SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/137009
Kind Code:
A1
Abstract:
A photovoltaic module abnormality detection method and system, and a photovoltaic system. The method comprises: determining sampling points and a preset target current value and a preset target voltage value at each sampling point (S11); performing closed-loop control on a photovoltaic module according to the preset target current value and the preset target voltage value at each sampling point in sequence (S12); collecting output current and an output voltage of each battery string in the photovoltaic module at each sampling point (S13); and determining whether the output current of each battery string at each sampling point is within a current tolerance range based on the preset target current value at each sampling point and whether each sampling voltage is within a voltage tolerance range based on the present target voltage value at each sampling point; if yes, determining that the battery string is normal, or otherwise, determining that the battery string is abnormal (S14). The system has low costs, and can find an abnormal battery string in the photovoltaic module in time so that a corresponding response measure can be taken in time, thereby facilitating improving the energy conversion efficiency and the safety performance of the photovoltaic module.

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Inventors:
ZHANG HUIZHEN (CN)
LIN ZHENHUANG (CN)
HUANG KAILUN (CN)
Application Number:
PCT/CN2018/101514
Publication Date:
July 18, 2019
Filing Date:
August 21, 2018
Export Citation:
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Assignee:
KEHUA HENGSHENG CO LTD (CN)
ZHANGZHOU KEHUA TECHNOLOGY CO LTD (CN)
International Classes:
H02S50/10
Domestic Patent References:
WO2013115236A12013-08-08
Foreign References:
CN108306616A2018-07-20
CN104506135A2015-04-08
CN102291052A2011-12-21
JP2015068690A2015-04-13
Attorney, Agent or Firm:
SHIJIAZHUANG GOWELL INTELLECTUAL PROPERTY LAW FIRM (CN)
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