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:
Apr. 08, 2014
Filed:
Apr. 02, 2009
Applicants:
Thomas Schubert, Ellerau, DE;
Uwe Bellgardt, Rostock, DE;
Inventors:
Thomas Schubert, Ellerau, DE;
Uwe Bellgardt, Rostock, DE;
Assignee:
Nordex Energy GmbH, Norderstedt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 9/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A wind energy plant and method for operating it, the plant having a doubly-fed asynchronous machine, a grid-sided converter and a generator-sided converter both being controlled by a control means. In case of a grid fault the converters are controlled by at least one control module which (i) controls the torque and/or the active power and (ii) controls the reactive current and/or the reactive power.