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Variable-speed wind power system with improved energy capture via multilevel conversion

United States Patent

May 31, 2005
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
Variable-Speed Wind Power System with Improved Energy Capture via Multilevel Conversion
A system and method for efficiently capturing electrical energy from a variable-speed generator are disclosed. The system includes a matrix converter using full-bridge, multilevel switch cells, in which semiconductor devices are clamped to a known constant DC voltage of a capacitor. The multilevel matrix converter is capable of generating multilevel voltage wave waveform of arbitrary magnitude and frequencies. The matrix converter can be controlled by using space vector modulation.
Erickson; Robert W. (Boulder, CO), Al-Naseem; Osama A. (Safat, KW), Fingersh; Lee Jay (Westminster, CO)
Midwest Research Institute (Kansas City, MO)
10/ 452,570
May 30, 2003
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention under Contract No. DE-AC36-99GO10337 between the United States Department of Energy and the National Renewable Energy Laboratory, a division of the Midwest Research Institute.