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. 05, 2022
Filed:
Oct. 05, 2021
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Marcos A. Donolo, Pullman, WA (US);
Jay Hartshorn, Moscow, ID (US);
Veselin Skendzic, Schwenksville, PA (US);
Chandrasekaran Swaminathan, Orefield, PA (US);
Vinod K. Yedidi, King of Prussia, PA (US);
Angelo D'Aversa, Ambler, PA (US);
Hang Li, King of Prussia, PA (US);
Subhash C. Patel, West Chester, PA (US);
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Abstract
A method includes receiving electrical measurements of an input signal of a power system. The method includes determining an estimated frequency of the power system using a rate of change of phase of the power system and using zero crossings of the power system. Selection between using the rate of change of phase of the power system and using zero crossings of the power system is based on a comparison between an estimated phase angle and a measured phase angle of the power system.