Title:
SWITCHING CIRCUIT AND CIRCUIT SWITCHING APPARATUS FOR LOW-VOLTAGE BIPOLAR POWER SUPPLY SYSTEM, AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2022/088739
Kind Code:
A1
Abstract:
Disclosed are a switching circuit and circuit switching apparatus for a low-voltage bipolar power supply system, 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 positive pole thyristor, a neutral line positive diode, a negative pole thyristor, a neutral line negative diode, a voltage stability control apparatus and a super capacitor. By means of the circuit switching apparatus provided in the present invention, a low-voltage direct-current bipolar power supply system supplies power to a high-reliability load; when an electrode connected to the load 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 other pole for power supply; the circuit switching apparatus provided in the present invention uses thyristors to control circuit switching, such that there is no direct-current electric arc during the circuit switching process; and the circuit switching apparatus provided in the present invention uses a non-isolated structure, such that the cost of the apparatus can be effectively reduced.
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Inventors:
SUN TIANKUI (CN)
XIAO XIAOLONG (CN)
SHI MINGMING (CN)
YANG JINGGANG (CN)
ZHUANG SHUYI (CN)
LIU LIGUO (CN)
HUANG QIFENG (CN)
SU WEI (CN)
YUAN YUBO (CN)
YUAN XIAODONG (CN)
GAO LEI (CN)
LIU JIAN (CN)
CHEN SHU (CN)
XIAO XIAOLONG (CN)
SHI MINGMING (CN)
YANG JINGGANG (CN)
ZHUANG SHUYI (CN)
LIU LIGUO (CN)
HUANG QIFENG (CN)
SU WEI (CN)
YUAN YUBO (CN)
YUAN XIAODONG (CN)
GAO LEI (CN)
LIU JIAN (CN)
CHEN SHU (CN)
Application Number:
PCT/CN2021/104274
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:
H02J1/08
Foreign References:
| CN112186732A | 2021-01-05 | |||
| CN105449742A | 2016-03-30 | |||
| CN103972914A | 2014-08-06 | |||
| CN111181148A | 2020-05-19 | |||
| JPH09172787A | 1997-06-30 |
Other References:
JIANQUAN LIAO, NIANCHENG ZHOU, QIANGGANG WANG: "Analysis and Suppression of Unbalanced Voltage in Radiant Bipolar DC Distribution Network", PROCEEDINGS OF THE CSEE, ZHONGGUO DIANJI GONGCHENG XUEHUI, CN, vol. 39, no. 18, 20 September 2019 (2019-09-20), CN , pages 1 - 10, XP055927022, ISSN: 0258-8013, DOI: 10.13334/j.0258-8013.pcsee.182086
Attorney, Agent or Firm:
CENTRAL SOUTH WELL INTELLECTUAL PROPERTY OFFICE. (CN)
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