Control strategy for variable-speed, stall-regulated wind turbines
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.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (US)
- DOE Contract Number:
- AC36-83CH10093
- OSTI ID:
- 594528
- Report Number(s):
- NREL/CP-500-24311; CONF-980623-; ON: DE98004908; TRN: US200311%%451
- Resource Relation:
- Conference: 1998 American controls conference, Philadelphia, PA (US), 06/24/1998--06/26/1998; Other Information: Supercedes report DE98004908; PBD: Apr 1998; PBD: 1 Apr 1998
- Country of Publication:
- United States
- Language:
- English
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