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. 05, 2026
Filed:
Apr. 22, 2022
Applicant:
Hitachi Energy Ltd, Zürich, CH;
Inventors:
Od Naidu, Karnataka, IN;
Dinesh Patil, Karnataka, IN;
Neethu George, Karnataka, IN;
Vedanta Pradhan, Bhubaneswar, IN;
Suresh Maturu, Pradesh, IN;
Assignee:
HITACHI ENERGY LTD, Zurich, CH;
Primary Examiner:
Int. Cl.
CPC ...
H02H 1/00 (2006.01); G01R 31/08 (2020.01); H02H 7/26 (2006.01);
U.S. Cl.
CPC ...
H02H 1/0092 (2013.01); G01R 31/088 (2013.01); H02H 7/26 (2013.01);
Abstract
Techniques for distance protection of a transmission line include determining a fault inception time from a voltage and/or current, determining rate of change sample values indicative of a rate of change of the voltage and/or of a rate of change of the current for at least one sample time that is dependent on the fault inception time, and using the rate of change sample values to generate a phase classifier for fault classification of a zone classifier for faulted zone identification.