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:
Feb. 23, 2021
Filed:
Aug. 21, 2018
Applicant:
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Inventors:
Ritwik Chowdhury, Toronto, CA;
Dale S. Finney, Little Bras D'or, CA;
Assignee:
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/34 (2020.01); H02H 7/06 (2006.01); F01D 15/10 (2006.01); H02H 3/52 (2006.01); G01R 31/50 (2020.01); H02H 3/08 (2006.01); G01R 19/25 (2006.01); G01R 21/00 (2006.01); H02H 3/16 (2006.01);
U.S. Cl.
CPC ...
H02H 7/06 (2013.01); F01D 15/10 (2013.01); G01R 31/343 (2013.01); G01R 31/50 (2020.01); H02H 3/52 (2013.01); F05D 2220/76 (2013.01); G01R 19/2513 (2013.01); G01R 21/001 (2013.01); H02H 3/083 (2013.01); H02H 3/16 (2013.01);
Abstract
Detection of electric power generator stator ground fault conditions and protection of the generator due to such conditions is provided herein. In one embodiment, a generator protection element may calculate generator third harmonic voltage quantities using measurements from the generator terminals, and determine a stator ground fault condition using the calculated generator third harmonic voltage quantity. A tripping subsystem may issue a trip command based upon detection of a stator ground fault condition.