Methods for Increasing Region 2 Power Capture on a Variable Speed HAWT

K. E. Johnson, L. J. Fingersh, M. J. Balas, L. Y. Pao

Research output: Contribution to conferencePaperpeer-review

44 Scopus Citations

Abstract

The standard region 2 control scheme for a variable speed wind turbine, τ c = kω 2, has several shortcomings that can result in significant power loss. The first of these is that there is no accurate way to determine the gain k; modeling programs are not accurate enough to represent all of the complex aerodynamics, and these aerodynamics change over time. Furthermore, it is not certain whether the value of k used in the standard control even provides for the maximum energy capture under real-world turbulent conditions. New control ideas are introduced to address these issues. First, it is shown in simulation that using smaller values of k than the standard can result in increased energy capture. Second, an optimally tracking rotor control scheme improves upon the standard scheme by assisting the rotor speed in tracking wind speed fluctuations more rapidly. Finally, an adpative control scheme is proposed that allows for maximum power capture despite parameter uncertainty.

Original languageAmerican English
Pages103-113
Number of pages11
StatePublished - 2004
Event2004 ASME Wind Energy Symposium: 42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, Nevada
Duration: 5 Jan 20048 Jan 2004

Conference

Conference2004 ASME Wind Energy Symposium: 42nd AIAA Aerospace Sciences Meeting and Exhibit
CityReno, Nevada
Period5/01/048/01/04

Bibliographical note

For preprint version including online full-text document, see NREL/CP-500-34979

NREL Publication Number

  • NREL/CP-500-36499

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