Title:
ARC FAULT DETECTION METHOD AND APPARATUS, AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/202078
Kind Code:
A9
Abstract:
An arc fault detection method and apparatus, and a device. The method comprises: acquiring a preset arc feature value, which is calculated on the basis of a collected direct current side signal of an inverter (S11); acquiring an initial feature threshold value (S12); according to the magnitude relationship between the preset arc feature value and the initial feature threshold value, determining whether a suspected arc occurs (S13); if so, performing a wave sealing operation on the inverter, and at least on the basis of an electric signal of the inverter after the wave sealing operation is performed thereon, determining an arc detection result corresponding to the suspected arc (S14), wherein the arc detection result comprises a real arc or a false arc; and on the basis of the arc detection result, adjusting an initial threshold value to obtain a target threshold value, and updating the initial feature threshold value to the target threshold value (S15). That is, in the method, the used initial feature threshold value can be adjusted according to the arc detection result of the actually detected suspected arc, such that the initial feature threshold value better conforms to an actual application environment, and the accuracy of the initial feature threshold value is improved, thereby improving the arc fault detection accuracy.
Inventors:
ZHANG RAN (CN)
LI HAITAO (CN)
ZHOU YINYIN (CN)
QI MENG (CN)
HUANG ZHIFENG (CN)
LI HAITAO (CN)
ZHOU YINYIN (CN)
QI MENG (CN)
HUANG ZHIFENG (CN)
Application Number:
PCT/CN2022/134752
Publication Date:
December 07, 2023
Filing Date:
November 28, 2022
Export Citation:
Assignee:
SUNGROW POWER SUPPLY CO LTD (CN)
International Classes:
G01R31/12; H02H7/26; H02S50/00
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)
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