公开(公告)号：US20200185901A1

公开(公告)日：2020-06-11

申请号：US16617124

申请日：2018-05-22

申请人： NR Electric Co., Ltd. ,  NR Engineering Co., Ltd.

发明人： Lei PAN ,  Jie TIAN ,  Yunlong Dong ,  Yu LU ,  Ruhai HUANG ,  Chongxue JIANG ,  Jiang LU ,  Baoshun ZHANG ,  Defeng QIU ,  Hua XIE

IPC分类号： H02H1/00 ,  H02J3/18 ,  H02H9/00

摘要： A method and apparatus for suppressing the impact of a compensator on line distance protection is provided, wherein the method comprises: obtaining a first current of a line connected to a compensator or series converters in the compensator, and a first voltage of a bus connected to the compensator or the line connected to the compensator; exiting the series converters and series transformers if the first current is greater than a preset current threshold and a duration is greater than a first preset time threshold; exiting the series converters and the series transformers if the first voltage is less than or equal to a preset voltage threshold and duration is greater than a second preset time threshold set the output voltage of the series converters to zero, and if a second current of an element corresponding to the first current meets conditions which the first current needs to meet; and otherwise, canceling the setting of the output voltage of the series converters to zero and obtaining a first current if a second voltage of the line corresponding to the first voltage is greater than the preset voltage threshold and the duration is greater than a third preset time threshold.