Title:
PHOTOVOLTAIC SYSTEM, DIRECT-CURRENT COMBINER BOX AND FAULT ISOLATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/174402
Kind Code:
A1
Abstract:
Disclosed in the present application are a photovoltaic system, a direct-current combiner box and a fault isolation method. The photovoltaic system comprises a fault isolation circuit and a DC/DC conversion circuit, wherein a first end of the fault isolation circuit is connected to N photovoltaic module strings, and a second end of the fault isolation circuit is connected to an input end of the DC/DC conversion circuit; the fault isolation circuit comprises switches of multiple poles, and each group of photovoltaic module strings among the N photovoltaic module strings is connected to an input end of a power conversion circuit by means of switches of the same pole among the switches of multiple poles; each group of photovoltaic module strings comprises at least two photovoltaic module strings; and when a reverse connection fault is present in the N photovoltaic module strings, the switches of multiple poles are disconnected. Therefore, the complexity of a hardware structure is reduced, and the costs of the fault isolation circuit are reduced.
Inventors:
ZHANG FANGPO (CN)
LIN TIANSAN (CN)
ZHANG XIUFENG (CN)
ZHAN JINXIANG (CN)
LIN TIANSAN (CN)
ZHANG XIUFENG (CN)
ZHAN JINXIANG (CN)
Application Number:
PCT/CN2021/076962
Publication Date:
August 25, 2022
Filing Date:
February 20, 2021
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02S40/32; H02H11/00
Foreign References:
| CN205961056U | 2017-02-15 | |||
| CN206117592U | 2017-04-19 | |||
| CN110729714A | 2020-01-24 | |||
| CN110571847A | 2019-12-13 | |||
| CN105977952A | 2016-09-28 | |||
| US20180248359A1 | 2018-08-30 |
Other References:
See also references of EP 4287503A4
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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