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:
Dec. 04, 2012
Filed:
Dec. 30, 2009
Applicant:
Man-on Pun, Cambridge, MA (US);
Inventor:
Man-On Pun, Cambridge, MA (US);
Assignee:
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F 19/00 (2011.01); G06F 17/18 (2006.01); G01R 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Power quality (PQ) events in a waveform in a power distribution network are detected by sampling the waveform. For each sample, a normalized sample is determined by subtracting an undistorted waveform from the sample. An accumulated weighted log-likelihood ratio (LLR) is determined for all normalized samples, as well as a minimum of the accumulated weighted LLR. If the difference between the accumulated weighted LLR an the minimum LLR is greater than a predetermined threshold, then the PQ event is signaled. The network can be a smart grid.