Title:
POWER CONVERSION CIRCUIT, ELECTRIC POWER TRANSMISSION SYSTEM, AND PHOTOVOLTAIC EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2022/021404
Kind Code:
A1
Abstract:
Embodiments of the present application provide a power conversion circuit, an electric power transmission system, and photovoltaic equipment. The power conversion circuit comprises: a first bridge arm comprising a first upper bridge arm and a first lower bridge arm, the first upper bridge arm comprising a switching device connected to a positive input end and an output end, the first lower bridge arm comprising a switching device connected between the output end and a negative input end, and each switching device comprising a switching tube and a first diode connected in anti-parallel to the switching tube; and unidirectional conducting devices respectively connected in parallel to one or both of the first upper bridge arm and the first lower bridge arm, the conducting direction of the unidirectional conducting devices being the same as the conducting direction of the first diodes of the first bridge arm, so as to shunt abnormal current flowing through the first diodes at least when a fault occurs. The present application improves the ability of the circuit to withstand current exceeding a set threshold, reduces the risk of device damage, is high in safety and reliability and simple in structure, and has less impact on the original circuit structure. Moreover, the present application allows for a wider response speed range for fault protection apparatuses.
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Inventors:
GAO YONGBING (CN)
CHEN DONG (CN)
SHI LEI (CN)
CHEN DONG (CN)
SHI LEI (CN)
Application Number:
PCT/CN2020/106375
Publication Date:
February 03, 2022
Filing Date:
July 31, 2020
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02H7/12; H02H9/02; H02H9/08
Foreign References:
| CN109245550A | 2019-01-18 | |||
| CN102545257A | 2012-07-04 | |||
| CN106329899A | 2017-01-11 | |||
| JPH02164218A | 1990-06-25 | |||
| US20120319733A1 | 2012-12-20 |
Attorney, Agent or Firm:
E-TONE INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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