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. 22, 2006
Filed:
Jul. 20, 2004
Akira Kikuchi, Hitachi, JP;
Motoo Futami, Hitachiota, JP;
Yasuhiro Imazu, Hitachi, JP;
Yoshio Eguchi, Hitachi, JP;
Akira Kikuchi, Hitachi, JP;
Motoo Futami, Hitachiota, JP;
Yasuhiro Imazu, Hitachi, JP;
Yoshio Eguchi, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An object of the present invention is to minimize the torsional vibration caused on the shafting of the wind turbine genarator system so as to operate the windmill stably. A wind turbine genarator system according to the present invention, equipped with a synchronous generator connected to the shaft of a windmill, converter connected to the stator of the synchronous generator, and inverter connected to the converter and also to an electric power system, extracts the torsional vibration component of the shafting between the windmill and synchronous generator from the detected rotation speed of the synchronous generator, regulates the active component of the current command to the converter according to the vibration component, and controls so as to minimize the rotation speed variation of the synchronous generator.