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.