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:
May. 30, 2017
Filed:
Mar. 22, 2016
Xj Group Corporation, Xuchang, CN;
Xuchang Xj Software Technologies Ltd, Xuchang, CN;
Xj Electric Co., Ltd, Xuchang, CN;
Xi'an Jiaotong University, Xi'an, CN;
State Grid Corporation of China, Beijing, CN;
Xing Liu, Xuchang, CN;
Ruizhi Jiang, Xuchang, CN;
Yuanhang Yang, Xuchang, CN;
Guobing Song, Xuchang, CN;
Guobin Li, Xuchang, CN;
Xu Zhu, Xuchang, CN;
Peiyao Liu, Xuchang, CN;
XJ GROUP CORPORATION, Xuchang, CN;
XUCHANG XJ SOFTWARE TECHNOLOGIES LTD, Xuchang, CN;
XJ ELECTRIC CO., LTD, Xuchang, CN;
XI'AN JIAOTONG UNIVERSITY, Xi'an, CN;
STATE GRID CORPORATION OF CHINA, Beijing, CN;
Abstract
The present invention relates to a differential protection method for bridge circuit in current converter control system, including the steps of: 1). obtaining sample values of the three-phase current for the current converter control system at AC side thereof, and calculating the absolute value of each sampling value respectively; 2). calculating a value of current at the AC side of the current converter control system; and 3). determining whether to perform a relay protection for the current converter control system according to the value current at the AC side of the current converter control system. The method of the present invention provided, is fast, convenient, and with a small amount of calculation. The current converter control system determines whether to perform a relay protection in a short time. Also it reduces the possibility that the equipment burned because of cannot break the circuit in time.