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:
Jul. 10, 2012
Filed:
Jul. 14, 2009
Robert J. Nelson, Orlando, FL (US);
John D. Amos, Oviedo, FL (US);
Hongtao MA, Orlando, FL (US);
Siemens Aktiengesellschaft, München, unknown;
Abstract
A wind farm () may include a plurality of variable speed wind turbines (). A centralized controller () may be configured to selectively adjust a respective electrical output power from each of the wind turbines at least during an underfrequency condition. The controller may include a monitor () configured to monitor a grid frequency value relative to at least a first threshold value. A deviation of the grid frequency value beyond the first threshold value is indicative of the underfrequency condition. The controller further includes a control unit () configured to effect a step response to the electrical output power of the wind turbine in a direction selected to counteract the underfrequency condition.