Aerodynamic Separability in Tip Speed Ratio and Separability in Wind Speed- a Comparison

The Science of Making Torque from Wind 2012

Santos, M.L. Gala^1 ; Leithead, W.E.^2 ; Jamieson, P.^1

CDT Wind Energy Systems, Department of Electronic and Electrical Engineering, University of Strathclyde, 204 George Street, Glasgow

G1 1XW, United Kingdom^1

Industrial Control Centre, Department of Electronic and Electrical Engineering, University of Strathclyde, 204 George Street, Glasgow

G1 1XW, United Kingdom^2

关键词: Additive function;    Aerodynamic torque;    Large wind turbines;    Nonlinear rotors;    Rotor speed;    Tip speed ratio;    Variable speed wind turbines;    Wind speed;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/555/1/012039/pdf
DOI  :  10.1088/1742-6596/555/1/012039

来源: IOP

【 摘 要 】

From extensive application over a number of years, it has been established that the nonlinear rotor aerodynamics of typical medium and large wind turbines exhibit an effectively global separability property, in other words the aerodynamic torque of the machine can be defined by two independent additive functions. Two versions of the separability of aerodynamic torque for variable speed wind turbines are investigated here; the separated function, related to wind speed, in the first version is only dependent on that variable and not rotor speed and in the second version is only dependent on tip speed ratio. Both provide very good approximations to the aerodynamic torque over extensive neighbourhoods of T0, at least from 0 to 2T0.