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:
Jan. 29, 2019
Filed:
Nov. 12, 2014
Alstom Technology Ltd, Baden, CH;
James Blake, Baden, CH;
Alan Baker, Baden, CH;
Joseph Schaeffer, Baden, CH;
Michael Putt, Baden, CH;
James Blake, Paradise Valley, AZ (US);
Alan Baker, N. Palm Beach Gardens, FL (US);
Joseph H. Schaeffer, Palm Beach Gardens, FL (US);
Michael Putt, Palm City, FL (US);
ALSTOM TECHNOLOGY LTD, Baden, CH;
Abstract
Systems and methods according to these exemplary embodiments provide for methods and systems related to optical current sensors used to monitor standby power transformers, specifically fiber optical current and voltage sensors and, more particularly, to applications involving filters for use in such sensors, such as frequency tracking comb filters. According to one embodiment, a method for monitoring a connection condition of a stand by power transformer includes the steps of measuring a current flowing through a high voltage side of the standby power transformer using at least one optical current sensor disposed proximate to a current flow path of the high voltage side, using a comb filter to filter the measured current, determining whether the filtered, measured current is less than a predetermined threshold value; and generating an alarm indication that the high voltage side of the standby power transformer is unconnected.