Title:
UNIDIRECTIONAL DIRECT CURRENT-DIRECT CURRENT AUTOTRANSFORMER, AND HIGH-LOW VOLTAGE SIDE FAULT ISOLATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/084120
Kind Code:
A1
Abstract:
A unidirectional direct current-direct current autotransformer for transmitting a direct-current power between two direct-current systems in a unidirectional mode. By means of optimized designs of a converter, a rectifier and an alternating-current link, defects whereby the converter has a large capacity, the alternating-current link has a large capacity, and running losses are high in the existing unidirectional direct current-alternating current-direct current conversion technique are improved. A voltage source type converter (11, 13) is used for controlling an alternating-current voltage of the unidirectional direct current-direct current autotransformer, thereby realizing controlling of a direct-current power transmitted from a low-voltage first direct-current system (7) to a high-voltage second direct-current system (8) or a direct-current power transmitted from the high-voltage second direct-current system to the low-voltage first direct-current system, and moreover, a bidirectional direct-current fault isolation capability is provided. Also provided is the corresponding direct-current fault isolation method for a high-low voltage side.
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Inventors:
LIN WEIXING (CN)
WEN JINYU (CN)
CHENG SHIJIE (CN)
WEN JINYU (CN)
CHENG SHIJIE (CN)
Application Number:
PCT/CN2015/096386
Publication Date:
May 26, 2017
Filing Date:
December 04, 2015
Export Citation:
Assignee:
UNIV HUAZHONG SCIENCE TECH (CN)
International Classes:
H02M3/335; H02H7/12; H02J1/10
Domestic Patent References:
| WO2014071598A1 | 2014-05-15 |
Foreign References:
| CN103762582A | 2014-04-30 | |||
| CN103959624A | 2014-07-30 |
Other References:
LIN, WEIXING ET AL.: "DC-DC Autotranformer Capable of Isolating DC Fault Currents", PROCEEDINGS OF THE CSEE, vol. 35, no. 4, 20 February 2015 (2015-02-20), pages 985 - 994, XP055383189, ISSN: 0258-8013
Attorney, Agent or Firm:
WUHAN DONGYU PATENT AGENCY (CN)
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