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. 20, 2008
Filed:
Oct. 26, 2005
Applicants:
Reigh Allen Walling, Clifton Park, NY (US);
Andre Langel, Münster, DE;
Inventors:
Reigh Allen Walling, Clifton Park, NY (US);
Andre Langel, Münster, DE;
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05D 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for detecting islanding conditions in an electrical grid having a power line voltage includes monitoring a detectable signal different from the power line voltage at a generating station, superimposing the detectable signal onto the power line voltage at a grid point outside the generating station, and switching the generating station from a grid-connected mode of operation to an islanded mode of operation when the signal to which the detector is responsive is determined to be absent.