Title:
ISOLATED LOW-VOLTAGE DIRECT-CURRENT SWITCHING CIRCUIT AND CIRCUIT SWITCHING APPARATUS, AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2022/088738
Kind Code:
A1
Abstract:
Disclosed are an isolated low-voltage direct-current switching circuit and circuit switching apparatus, and a control method. The circuit comprises: a grid-side positive pole direct-current switch, a grid-side neutral line direct-current switch, a grid-side negative pole direct-current switch, a load-side positive pole direct-current switch, a load-side negative pole direct-current switch, a load-side rectifier diode, a load-side rectifier diode, a load-side rectifier diode, a load-side rectifier diode, a grid-side positive pole switch transistor, a grid-side positive pole switch transistor, a grid-side positive pole switch transistor, a grid-side positive pole switch transistor, a grid-side negative pole switch transistor, a grid-side negative pole switch transistor, a grid-side negative pole switch transistor, a grid-side negative pole switch transistor and a three-winding transformer. By means of the present invention, a low-voltage direct-current bipolar power supply system supplies power to a high-reliability load; when a positive pole in the low-voltage bipolar power supply system fails and loses power, the circuit switching apparatus provided in the present invention can switch the load to a negative pole for power supply; and when the negative pole in the low-voltage bipolar power supply system fails and loses power, the circuit switching apparatus provided in the present invention can switch the load to the positive pole for power supply.
Inventors:
SUN TIANKUI (CN)
SU WEI (CN)
SHI MINGMING (CN)
YANG JINGGANG (CN)
ZHUANG SHUYI (CN)
LIU LIGUO (CN)
HUANG QIFENG (CN)
GAO LEI (CN)
XIAO XIAOLONG (CN)
YUAN YUBO (CN)
YUAN XIAODONG (CN)
LIU JIAN (CN)
CHEN SHU (CN)
SU WEI (CN)
SHI MINGMING (CN)
YANG JINGGANG (CN)
ZHUANG SHUYI (CN)
LIU LIGUO (CN)
HUANG QIFENG (CN)
GAO LEI (CN)
XIAO XIAOLONG (CN)
YUAN YUBO (CN)
YUAN XIAODONG (CN)
LIU JIAN (CN)
CHEN SHU (CN)
Application Number:
PCT/CN2021/104272
Publication Date:
May 05, 2022
Filing Date:
July 02, 2021
Export Citation:
Assignee:
STATE GRID JIANGSU ELECTRIC POWER CO RES INST (CN)
JIANGSU ELECTRIC POWER RES INST CO LTD (CN)
JIANGSU ELECTRIC POWER RES INST CO LTD (CN)
International Classes:
H02M3/335
Foreign References:
| CN112187060A | 2021-01-05 | |||
| CN110350797A | 2019-10-18 | |||
| CN111052588A | 2020-04-21 | |||
| CN202135054U | 2012-02-01 | |||
| CN202840962U | 2013-03-27 | |||
| CN106451523A | 2017-02-22 | |||
| US20080049458A1 | 2008-02-28 |
Other References:
HENRIQUE R.MAMEDE ET AL.: "A New DC-DC Power Converter Derived from the TAB for Bipolar DC Microgrids", 2015 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION, 24 September 2015 (2015-09-24), pages 6217 - 6222, XP032801421, ISSN: 2329-3748, DOI: 10.1109/ECCE.2015.7310532
Attorney, Agent or Firm:
CENTRAL SOUTH WELL INTELLECTUAL PROPERTY OFFICE. (CN)
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