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:
Aug. 07, 2007
Filed:
Dec. 08, 2005
Haiqing Weng, Shanghai, CN;
Robert William Delmerico, Clifton Park, NY (US);
Xiaoming Yuan, Shanghai, CN;
Changyong Wang, Shanghai, CN;
Haiqing Weng, Shanghai, CN;
Robert William Delmerico, Clifton Park, NY (US);
Xiaoming Yuan, Shanghai, CN;
Changyong Wang, Shanghai, CN;
General Electric Company, Niskayuna, NY (US);
Abstract
A protection system and a protection method are provided for protecting a double fed induction generator and a gearbox during a grid fault. The protection system includes a plurality of controlled impedance devices. Each of the controlled impedance devices is coupled between a respective phase of a stator winding of the double fed induction generator and a respective phase of a grid side converter. The protection system also includes a controller configured for coupling and decoupling impedance in one or more of the plurality of controlled impedance devices in response to changes in at least one of a utility grid voltage and a utility grid current.