Statistical Extrapolation Methods for Estimating Wind Turbine Extreme Loads
With the introduction of the third edition of the International Electrotechnical Commission (IEC) Standard 61400-1, designers of wind turbines are now explicitly required, in one of the prescribed loa...
With the introduction of the third edition of the International Electrotechnical Commission (IEC) Standard 61400-1, designers of wind turbines are now explicitly required, in one of the prescribed loa...
A Modified Dynamic Stall Model for Low Mach Numbers
The Leishman–Beddoes dynamic stall model is a popular model that has been widely applied in both helicopter and wind turbine aerodynamics. This model has been specially refined and tuned for hel...
The Leishman–Beddoes dynamic stall model is a popular model that has been widely applied in both helicopter and wind turbine aerodynamics. This model has been specially refined and tuned for hel...
Adaptive Pitch Control of Variable-Speed Wind Turbines
J. Sol. Energy Eng. -- August 2008 -- Volume 130, Issue 3, 031012 (7 pages)
doi:10.1115/1.2931505
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The aerodynamic efficiency of a variable-speed wind turbine operating in Region 2, or below-rated wind speeds, is greatly affected by the identification of accurate parameters for the controller. In particular, the power coefficient (Cp) surface must be well known for optimal efficiency to be achieved with a constant-gain controller. However, adaptive control can overcome the inefficiencies caused by inaccurate knowledge of the Cp surface. Previous work focused on adaptive torque gain control to cause a variable-speed turbine to operate, on average, at the tip-speed ratio 
* for which the maximum Cp occurs. This paper considers the effects of adaptive blade pitch angle control on a turbine's aerodynamic efficiency. Computer simulations and tests on a field turbine are used to verify the adaptive pitch control scheme. Simulation and field test results demonstrate that the adaptive pitch controller causes the pitch angle to approach its optimal value. Adaptive pitch control can be used to seek the optimal pitch angle for energy capture in Region 2 operation. Additional field operation is required before a statistically significant improvement in energy capture can be demonstrated.
* for which the maximum Cp occurs. This paper considers the effects of adaptive blade pitch angle control on a turbine's aerodynamic efficiency. Computer simulations and tests on a field turbine are used to verify the adaptive pitch control scheme. Simulation and field test results demonstrate that the adaptive pitch controller causes the pitch angle to approach its optimal value. Adaptive pitch control can be used to seek the optimal pitch angle for energy capture in Region 2 operation. Additional field operation is required before a statistically significant improvement in energy capture can be demonstrated.
©2008 American Society of Mechanical Engineers
| History: | Received 13 February 2007; revised 31 August 2007; published 2 July 2008 | |
| doi: | http://dx.doi.org/10.1115/1.2931505 | |
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- 89.30.Ee
Hydroelectric, hydrothermal, geothermal and wind power - YEAR: 2008
