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:
Jun. 27, 2017
Filed:
Oct. 19, 2010
Applicant:
Keith Slavin, Beaverton, OR (US);
Inventor:
Keith Slavin, Beaverton, OR (US);
Assignee:
SunPower Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/48 (2007.01);
U.S. Cl.
CPC ...
H02M 7/4807 (2013.01);
Abstract
A method includes generating samples of a grid parameter at a point of common coupling, fitting a waveform to the samples, and detecting an islanding condition in response to a parameter of the waveform. The waveform may be fit to the samples using a nonlinear algorithm. A controller includes a waveform fitting circuit to fit a waveform to samples of a grid parameter, an inverter controller to generate one or more switching signals to control an inverter in response to an error signal, and an error generator arranged to generate the error signal in response to a parameter of the waveform.