Title:
RAPID SHUTDOWN SYSTEM FOR PHOTOVOLTAIC GRID-CONNECTED POWER GENERATION
Document Type and Number:
WIPO Patent Application WO/2022/166928
Kind Code:
A1
Abstract:
Disclosed are a rapid shutdown system for photovoltaic grid-connected power generation, which system relates to the technical field of photovoltaic grid-connected power generation. The utility model mainly comprises a short circuit shutdown circuit configured on an output side of a photovoltaic assembly, and a direct-current bypass circuit configured on an output side of a photovoltaic string. By means of the short circuit shutdown circuit that mainly comprises a first switch member, a second switch member, an energy storage element, a first control module and a first auxiliary power source, when there is a short circuit, the connection between the photovoltaic assembly and the photovoltaic string is automatically disconnected, and after the connection is disconnected, re-connection can be performed only when short circuit detection is passed; and by means of the direct-current bypass circuit that comprises a third switch member and a resistor element, the short circuit shutdown circuit of each assembly is short-circuited or bucked, so as to realize rapid shutdown. The utility model can meet the safety regulation requirements of a photovoltaic system for rapid shutdown, and is low in cost and has a good reliability and safety.
Inventors:
SONG YUE (CN)
CHEN ZEXI (CN)
CHEN ZEXI (CN)
Application Number:
PCT/CN2022/075202
Publication Date:
August 11, 2022
Filing Date:
January 30, 2022
Export Citation:
Assignee:
SHENZHEN ZHONGXU NEW ENERGY CO LTD (CN)
International Classes:
H02J3/38; H02H3/06; H02H7/26; H02J3/32
Foreign References:
| CN215498289U | 2022-01-11 | |||
| CN111585307A | 2020-08-25 | |||
| CN109038669A | 2018-12-18 | |||
| CN203456934U | 2014-02-26 | |||
| CN108512245A | 2018-09-07 | |||
| US20180226890A1 | 2018-08-09 |
Attorney, Agent or Firm:
GUANGDONG SHIJI PATENT AGENCT COMPANY (CN)
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