Title:
MEDIUM-HIGH VOLTAGE BIDIRECTIONAL ALL-SOLID-STATE DIRECT-CURRENT CIRCUIT BREAKER AND HIGH-POTENTIAL ENERGY SUPPLY APPARATUS THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/115101
Kind Code:
A1
Abstract:
The present invention provides a medium-high voltage bidirectional all-solid-state direct-current circuit breaker and a high-potential energy supply apparatus thereof. The medium-high voltage bidirectional all-solid-state direct-current circuit breaker has a high-current cutout ability, does not greatly increase the system cost, and can realize bidirectional through-flow. The present invention relates to the field of direct-current medium-high voltage electric appliances. The medium-high voltage bidirectional all-solid-state direct-current circuit breaker comprises a mechanical isolation switch, a current-limiting inductor, a rated current path branch, and a fault current cutout branch, wherein the rated current path branch is connected in parallel to the fault current cutout branch; the rated current path branch comprises a power electronic switch assembly and an IGBT assembly that are connected in series; the power electronic switch assembly is formed by connecting a plurality of groups of thyristor units in series; and the fault current cutout branch is formed by connecting a plurality of groups of IGBT units in series. Each IGBT unit has a full-bridge bidirectional through-flow topological structure, can achieve the bidirectional through-flow of current, and also can double a fault current through-flow ability. The high-potential energy supply apparatus converts three-phase alternating current into a high-frequency high-voltage direct-current power source so as to supply power for an IGBT module of the all-solid-state direct-current circuit breaker, thereby greatly reducing the size of the energy supply apparatus.
Inventors:
SHI XIAODONG (CN)
CHEN PENG (CN)
SHI QINFENG (CN)
ZHU JIANJUN (CN)
ZHENG LICHENG (CN)
CHEN PENG (CN)
SHI QINFENG (CN)
ZHU JIANJUN (CN)
ZHENG LICHENG (CN)
Application Number:
PCT/CN2020/130465
Publication Date:
June 17, 2021
Filing Date:
November 20, 2020
Export Citation:
Assignee:
ZHEJIANG DOWAY ADVANCED TECH CO LTD (CN)
International Classes:
H02H7/26
Foreign References:
| CN110943440A | 2020-03-31 | |||
| CN211655738U | 2020-10-09 | |||
| CN103997322A | 2014-08-20 | |||
| CN106558864A | 2017-04-05 | |||
| CN104242265A | 2014-12-24 | |||
| CN108889096A | 2018-11-27 | |||
| US20180174784A1 | 2018-06-21 |
Attorney, Agent or Firm:
ZHEJIANG KG IP LAW FIRM (CN)
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