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:
Oct. 01, 2012
Filed:
May. 02, 2004
Raymond M. Hudson, Livermore, CA (US);
Raymond M. Hudson, Livermore, CA (US);
Schneider Electric USA, Inc., Palatine, IL (US);
Abstract
A controller () for a doubly fed induction generator () adjusts control signals to a rotor side converter () and line side converter () to adjust rotor current when a voltage transient on a utility grid () occurs, so that the doubly fed induction generator can ride through the transient. The controller can also turn off the transistors of the rotor side converter () to reduce rotor current and/or activate a crowbar () to reduce the voltage of the DC link () connecting the converters () when significant voltage transients occur on the grid (). This permits continued operation of the DFIG system without disconnecting from the grid.