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, 2025
Filed:
Dec. 21, 2021
Applicant:
Hitachi Energy Ltd, Zürich, CH;
Inventors:
Od Naidu, Karnataka, IN;
Neethu George, Karnataka, IN;
Assignee:
HITACHI ENERGY LTD, Zürich, CH;
Primary Examiner:
Int. Cl.
CPC ...
H02H 1/00 (2005.12); G01R 31/08 (2019.12); H02H 7/22 (2005.12);
U.S. Cl.
CPC ...
H02H 1/0007 (2012.12); G01R 31/085 (2012.12); H02H 7/226 (2012.12);
Abstract
Fault classification and zone identification in a power transmission system are described. Voltage or current measurements are obtained at a terminal of the transmission line in each of the three phases measured during a fault. Modal transformations are performed on voltage or current measurements to obtain traveling wave signals with reference to each of the three phases. Based on the magnitude of the traveling wave signals the fault is classified.