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Title:
PHOTOVOLTAIC SYSTEM DIRECT-CURRENT ARC FAULT DETECTION METHOD, APPARATUS AND DEVICE, AND MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/231404
Kind Code:
A1
Abstract:
Disclosed in the present invention are a photovoltaic system direct-current arc fault detection method, apparatus and device, and a computer readable storage medium. The method comprises: detecting whether an optimizer control apparatus and a power optimizer in a photovoltaic system are in a communication state; if it is determined that the optimizer control apparatus and the power optimizer are not in the communication state, acquiring a direct-current side alternating-current signal of an inverter in the photovoltaic system; extracting a signal feature of a preset arc detection frequency band in the direct-current side alternating-current signal as a first arc signal feature; and analyzing according to the first arc signal feature to obtain a direct-current arc fault detection result of the photovoltaic system. According to the present invention, direct-current arc fault detection is performed by using gaps in power optimizer communication; thus, the impact of power optimizer communication on arc detection is avoided while functions of the power optimizer and the arc detection are compatible, and the false detection rate of arc detection is reduced.

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Inventors:
ZHANG RAN (CN)
HUANG ZHIFENG (CN)
LI HAITAO (CN)
HE YI (CN)
PAN NIAN’AN (CN)
YU YANFEI (CN)
Application Number:
PCT/CN2022/142444
Publication Date:
December 07, 2023
Filing Date:
December 27, 2022
Export Citation:
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Assignee:
SUNGROW POWER SUPPLY CO LTD (CN)
International Classes:
H02S50/00; G01R31/12
Foreign References:
CN114696742A2022-07-01
CN115021676A2022-09-06
CN106154120A2016-11-23
CN112088475A2020-12-15
CN109600115A2019-04-09
US20120318320A12012-12-20
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)
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