The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2020
Filed:
Nov. 15, 2016
Xj Group Corporation, Xuchang, Henan, CN;
Xj Electric Co., Ltd, Xuchang, Henan, CN;
Xuchang Xj Software Technology Co., Ltd, Xuchang, Henan, CN;
State Grid Corporation of China, Beijing, CN;
Baowei Li, Xuchang, CN;
Chuankun Ni, Xuchang, CN;
Wenzheng Li, Xuchang, CN;
Xu Li, Xuchang, CN;
Ziqiang Jiang, Xuchang, CN;
Yanmei Tang, Xuchang, CN;
Huizhen Hao, Xuchang, CN;
Xin Shi, Xuchang, CN;
Jiansong Zhao, Xuchang, CN;
Xintao Dong, Xuchang, CN;
Yingying Xi, Xuchang, CN;
Quanxia Ma, Xuchang, CN;
Yantao Qiao, Xuchang, CN;
Yu Tang, Xuchang, CN;
Liping Meng, Xuchang, CN;
XJ GROUP CORPORATION, Xuchang, Henan, CN;
XJ ELECTRIC CO., LTD., Xuchang, Henan, CN;
XUCHANG XJ SOFTWARE TECHNOLOGY CO., LTD., Xuchang, Henan, CN;
STATE GRID CORPORATION OF CHINA, Beijing, CN;
Abstract
The present disclosure relates to a method for preventing a maloperation of differential protection of an optical fiber caused by saturation of a single Current Transformer (CT) of 3/2 connection. By applying a combination of the differential judgment and the sub-CT current judgment, reliable identification of internal and external faults is ensured, and the problem of misjudging of the internal fault as the external fault can be prevented as well.