Control strategy for variable-speed, stall-regulated wind turbines

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A variable-speed, constant-pitch wind turbine was investigated to evaluate the feasibility of constraining its rotor speed and power output without the benefit of active aerodynamic control devices. A strategy was postulated to control rotational speed by specifying the demanded generator torque. By controlling rotor speed in relation to wind speed, the aerodynamic power extracted by the blades from the wind was manipulated. Specifically, the blades were caused to stall in high winds. In low and moderate winds, the demanded generator torque and the resulting rotor speed were controlled to cause the wind turbine to operate near maximum efficiency. A computational ... continued below

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6 pages

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Muljadi, E.; Pierce, K. & Migliore, P. April 1, 1998.

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Description

A variable-speed, constant-pitch wind turbine was investigated to evaluate the feasibility of constraining its rotor speed and power output without the benefit of active aerodynamic control devices. A strategy was postulated to control rotational speed by specifying the demanded generator torque. By controlling rotor speed in relation to wind speed, the aerodynamic power extracted by the blades from the wind was manipulated. Specifically, the blades were caused to stall in high winds. In low and moderate winds, the demanded generator torque and the resulting rotor speed were controlled to cause the wind turbine to operate near maximum efficiency. A computational model was developed, and simulations were conducted of operation in high turbulent winds. Results indicated that rotor speed and power output were well regulated. 7 refs., 7 figs.

Physical Description

6 pages

Notes

OSTI as DE98004908

Source

  • 1998 American controls conference, Philadelphia, PA (US), 06/24/1998--06/26/1998; Other Information: Supercedes report DE98004908; PBD: Apr 1998

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  • Other: DE98004908
  • Report No.: NREL/CP--500-24311
  • Report No.: CONF-980623--
  • Grant Number: AC36-83CH10093
  • Office of Scientific & Technical Information Report Number: 594528
  • Archival Resource Key: ark:/67531/metadc690735

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  • April 1, 1998

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • March 28, 2016, 12:16 p.m.

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Muljadi, E.; Pierce, K. & Migliore, P. Control strategy for variable-speed, stall-regulated wind turbines, article, April 1, 1998; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc690735/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.