Title:
MICRO-LOSS COMBINED MECHANICAL DIRECT CURRENT CIRCUIT BREAKER AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/104793
Kind Code:
A1
Abstract:
A micro-loss combined mechanical direct current circuit breaker and a control method therefor, wherein a used circuit breaker comprises n wiring terminals, n through-flow branches, and one commutation branch; the n through-flow branches are connected in parallel with the one commutation branch, and each through-flow branch is divided into an upper bridge arm and a lower bridge arm by using a connection point as a boundary; each wiring terminal is electrically connected to a connection point of a through-flow branch; the upper bridge arm of each through-flow branch comprises an auxiliary mechanical switch, and the lower bridge arm comprises one isolation switch and one semiconductor switch assembly which are connected to one another in series; the commutation branch comprises one main mechanical switch, one high voltage arm capacitor and one low voltage arm capacitor in series connection; the control method therefor comprises operating in a micro-loss state and breaking a fault current during normal operation, as well as permanent fault fast reclosing and temporary fault fast reclosing. One direct current circuit breaker of the present solution may achieve the breaking and isolation of fault currents of all external wiring circuits on one bus bar, thereby reducing the construction costs for a direct current circuit breaker in a direct current power grid. The direct current circuit breaker may achieve fast reclosing while not causing current overshoot, which provides strong technical support for the development of an overhead line direct current grid.
Inventors:
WEN WEIJIE (CN)
LI BIN (CN)
LI BIN (CN)
Application Number:
PCT/CN2017/118163
Publication Date:
June 06, 2019
Filing Date:
December 25, 2017
Export Citation:
Assignee:
UNIV TIANJIN (CN)
International Classes:
H02J1/00
Foreign References:
| CN105656019A | 2016-06-08 | |||
| CN107947131A | 2018-04-20 | |||
| CN107947132A | 2018-04-20 | |||
| JP2016541088A | 2016-12-28 |
Attorney, Agent or Firm:
BEI & OCEAN (CN)
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