Title:
PROTECTION CIRCUIT FOR PREVENTING MISCONNECTION OF INPUT ENDS, AND PHOTOVOLTAIC POWER GENERATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/253155
Kind Code:
A1
Abstract:
A protection circuit for preventing misconnection of input ends and a photovoltaic power generation system. The protection circuit comprises: an input end, a misconnection detection unit (101), a mechanical linkage unit (102) and a switch unit (K). The input end is used to connect an output end of a direct current power supply (103); a first input end of the misconnection detection unit (101) is connected to a first port (A) of the input end, and a second input end of the misconnection detection unit (101) is connected to a second port (B) of the input end; the output end of the misconnection detection unit (101) is coupled to the mechanical linkage unit (102); the mechanical linkage unit (102) is connected to the switch unit (K); a first end of the switch unit (K) is used to connect the input end, and a second end of the switch unit (K) is used to connect a post-stage circuit; and the misconnection detection unit (101) is used to control, when the first port (A) and the second port (B) are connected incorrectly, the mechanical linkage unit (102) to maintain the first end of the switch unit (K) and the second end of the switch unit (K) in a disconnected state. The protection circuit can prevent circuits from being damaged from misconnection, when the positive electrode and the negative electrode of the power supply connected to the input end are misconnected.
Inventors:
ZHANG XIUFENG (CN)
ZHANG YANZHONG (CN)
YAN GUANGCHAO (CN)
ZHANG FANGPO (CN)
TIAN XIAOKANG (CN)
ZHANG YANZHONG (CN)
YAN GUANGCHAO (CN)
ZHANG FANGPO (CN)
TIAN XIAOKANG (CN)
Application Number:
PCT/CN2020/096083
Publication Date:
December 23, 2021
Filing Date:
June 15, 2020
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02H11/00
Foreign References:
| CN109546642A | 2019-03-29 | |||
| CN206340971U | 2017-07-18 | |||
| CN2896632Y | 2007-05-02 | |||
| CN103683263A | 2014-03-26 | |||
| CN110571847A | 2019-12-13 | |||
| CN206727902U | 2017-12-08 | |||
| CN206041486U | 2017-03-22 | |||
| JP2009050063A | 2009-03-05 |
Other References:
See also references of EP 4148931A4
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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