Title:
PHOTOVOLTAIC SYSTEM, AND CIRCUIT PROTECTION METHOD FOR PHOTOVOLTAIC SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/067317
Kind Code:
A1
Abstract:
A photovoltaic system (10), and a circuit protection method for the photovoltaic system (10). The photovoltaic system (10) comprises an active protection switch (103), a direct current-direct current conversion circuit (106) and a controller (109), wherein one end of the active protection switch (103) is connected to a photovoltaic assembly, the other end thereof is connected to an input end of the direct current-direct current conversion circuit (106), and an output end of the direct current-direct current conversion circuit (106) is connected to a load; and the controller (109) is used for: when the reverse current of a photovoltaic unit (101) is greater than or equal to a current threshold value, issuing, to the active protection switch (103) and according to the input voltage of the direct current-direct current conversion circuit (106), a disconnection instruction for triggering the disconnection of the active protection switch (103), and when the active protection switch (103) is not effectively disconnected within a preset duration after the disconnection instruction is issued to the active protection switch (103), adjusting the input voltage of the direct current-direct current conversion circuit (106) to be less than or equal to a first voltage threshold value. The safety and reliability of the photovoltaic system (10) can be improved.
Inventors:
QI XIN (CN)
XU ZHIWU (CN)
ZHANG XIUFENG (CN)
XU ZHIWU (CN)
ZHANG XIUFENG (CN)
Application Number:
PCT/CN2023/120195
Publication Date:
April 04, 2024
Filing Date:
September 20, 2023
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02H7/00; H02H7/20; H02S40/30
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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