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:
Jun. 04, 2019
Filed:
Sep. 16, 2016
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Edmund O. Schweitzer, III, Pullman, WA (US);
Mangapathirao Venkata Mynam, Pullman, WA (US);
David E. Whitehead, Pullman, WA (US);
Bogdan Z. Kasztenny, Markham, CA;
Armando Guzman-Casillas, Pullman, WA (US);
Veselin Skendzic, Schwenksville, PA (US);
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Abstract
The present disclosure relates to detection of faults in an electric power system. In one embodiment, a time-domain traveling wave differential subsystem is configured to determine at a first terminal a first index between an arrival maximum of a traveling wave generated by a fault at the first terminal and an exit maximum of the traveling wave. The traveling wave subsystem also determines a second index between an arrival maximum of the traveling wave at the second terminal and an exit maximum of the traveling wave. An operating quantity and a restraint quantity may be determined based on a magnitude of the representations of electrical conditions in the first index and the second index. A fault may be declared based on a comparison of the operating quantity and the restraint quantity. A protective action subsystem may be configured to implement a protective action based on the declaration of the fault.