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:
Jul. 29, 2014
Filed:
Nov. 09, 2010
Youyi LI, Beijing, CN;
Bin Su, Beijing, CN;
Ying Yang, Beijing, CN;
Torbjorn Einarsson, Vasteras, SE;
Zoran Gajic, Vasteras, SE;
Youyi Li, Beijing, CN;
Bin Su, Beijing, CN;
Ying Yang, Beijing, CN;
Torbjorn Einarsson, Vasteras, SE;
Zoran Gajic, Vasteras, SE;
ABB Research Ltd., Zurich, CH;
Abstract
A synchronization method for current differential protection comprises: selecting a point on the transmission line protected by the current differential protection; measuring the current and the voltage of each of the terminals of said transmission line; calculating the compensating voltage at the selected point respectively according to the measured current and the voltage of the each terminal; detecting and calculating the synchronization error by comparing all the compensating voltages.