公开(公告)号：EP4016778A1

公开(公告)日：2022-06-22

申请号：EP20852658.2

申请日：2020-03-17

申请人： NR ELECTRIC CO., LTD. ,  NR Engineering Co., Ltd.

发明人： LIU, Yongsheng ,  HOU, Wei ,  CHEN, Jun ,  WANG, Wenlong ,  LI, Yuqi

IPC分类号： H02H7/26 ,  H02H3/26 ,  G01R19/10

摘要： The present application provides a protection method, apparatus and system for a pseudo-bipolar direct-current power distribution network, and a device and a medium. The method comprises: detecting a transverse differential current value of a first direct-current switch of the pseudo-bipolar direct-current power distribution network, the transverse differential current value being an absolute value of a difference between a positive pole current amplitude and a negative pole current amplitude of the first direct-current switch; generating first transverse differential out-of-limit signals in response to a condition of the transverse differential current value being greater than a preset transverse differential out-of-limit threshold; detecting second transverse differential out-of-limit signals of a subordinate direct-current switch of the first direct-current switch; and determining that the fault of the first direct-current switch is an internal fault in response to a condition that the first transverse differential out-of-limit signals have been generated and the second transverse differential out-of-limit signals of the subordinate direct-current switch of the first direct-current switch are not found, and performing fault protection.