公开(公告)号：US20200052483A1

公开(公告)日：2020-02-13

申请号：US15580520

申请日：2016-11-28

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY ,  GUANGZHOU POWER SUPPLY CO. LTD.

Inventor： Zhao YUAN ,  Junxiang LIU ,  Fating YUAN ,  Lixue CHEN ,  Junjia HE ,  Yuan PAN ,  Kaijian WU ,  Yong WANG ,  Wenxiong MO ,  Haibo SU

IPC: H02H9/02 ,  H02H3/02

Abstract: A short circuit fault current limiter includes a circuit breaker, a transfer current limiting unit and a current detection unit. The current detection unit is connected to the circuit breaker in series, and the circuit breaker and the transfer current limiting unit are connected in parallel into the power system line. An output terminal of the current detection unit is connected to a control terminal of the transfer current limiting unit. The current detection unit is configured to detect a fault current flowing through a branch of the circuit breaker under a short circuit fault operating condition and trigger the corresponding trigger switch of the transfer current limiting unit to be switched on, so that the circuit breaker is disconnected and the secondary side winding of the coupling reactor is connected to the system line in series, which is capable of rapidly limiting the amplitude of the fault current and reducing impact of the fault current on the system.

公开(公告)号：US20180005783A1

公开(公告)日：2018-01-04

申请号：US15703959

申请日：2017-09-13

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhao YUAN ,  Junjia HE ,  Yuan PAN ,  Hui XU ,  Wenting ZHAO ,  Xiaogen YIN

IPC: H01H33/59 ,  H02H9/02 ,  H02H3/38

CPC classification number: H01H33/596 ,  H01H9/542 ,  H02H3/021 ,  H02H3/087 ,  H02H3/38 ,  H02H9/02

Abstract: A direct current circuit breaker, including: n in number circuit breaker modules connected in series, one energy-absorbing and voltage-limiting module connected in parallel to the n in number circuit breaker modules, and a trigger module. The n in number circuit breaker modules each includes a mechanical switch and a commutation branch circuit which are connected in parallel; each commutation branch circuit includes a charging commutation module and a commutation capacitor which are connected in series; the charging commutation module is configured to charge up the commutation capacitor and produce reverse current to cut off the mechanical switch; the one energy-absorbing and voltage-limiting module is configured to absorb energy stored in inductive elements of power systems after a fault current is cut off, so as to limit voltage and protect the mechanical switch, and n is a positive integer greater than or equal to 1.