This component models the simple mechanical physics of a wind turbine, considering blade configuration (2 or 3 blade), tip speed ratio, coefficient of power, and blade sweep area and radius. Shaft dynamics are not considered in this model and it may be used together with the wind governor model. Wind speed Vw and the mechanical speed of the machine connected to the turbine W are the inputs. Beta is the pitch angle of the turbine blades and is entered in degrees. Tm and P are the output torque and power respectively in per-unit, based on the machine rating.
Two type of turbines are modelled, a 2 blade (MOD 5) and a 3 blade (MOD 2).
Inputs:
Vw: Wind speed (must be a positive value) [m/s]
W: Machine mechanical speed [rad/s]
Beta: Pitch angle [deg]
Outputs:
Tm: Output torque of the turbine [pu]
P: Output power of the turbine [pu]
More: |
Name for Identification |
Text |
Optional text parameter for identification of the component. |
||
Generator Rated MVA |
|
REAL |
Constant |
Rated MVA of the machine [MVA] |
|
|
|
|
|
Machine Rated Angular Speed |
|
REAL |
Constant |
Rated mechanical speed of the machine [rad/s] |
|
|
|
|
|
Rotor Radius |
|
REAL |
Constant |
Radius of the wind turbine blades [m] |
|
|
|
|
|
Rotor Area |
|
REAL |
Constant |
Rotor blade area [m2] |
|
|
|
|
|
Air Density |
|
REAL |
Constant |
Air density [kg/m3] |
|
|
|
|
|
Gearbox Efficiency |
|
REAL |
Constant |
Efficiency of the turbine gearbox [pu] |
|
|
|
|
|
Gear Ratio - Machine/Turbine |
|
REAL |
Variable |
Gearbox speed ratio |
|
|
|
|
|
Equation for Power Coefficient |
|
Choice |
|
Select MOD 2, MOD 5 or External Input. MOD 2 is suitable for a horizontal axis turbine with three blades (see [1] above), whereas MOD 5 is suitable for a horizontal axis turbine with two blades (see [2] above). External Input allows the user to specify power coefficient through a connection. |