Settings

The parameters af the atmospheric model can be configured in the section environment of the settings.yaml file in the data folder.

The file system.yaml specifies which yaml files are used to configure the current project.

Example for system.yaml

system:
    project: "settings.yaml"  # simulator settings

Often additional yaml files, for example for the controller settings are used.

Example settings_nearshore.yaml, scenario Maasvlakte, NL

environment:
    v_wind: 10.35            # wind speed at reference height          [m/s]
    upwind_dir: -90.0        # upwind direction                        [deg]
    temp_ref: 15.0           # temperature at reference height         [°C]
    height_gnd: 0.0          # height of groundstation above see level [m]
    h_ref:  6.0              # reference height for the wind speed     [m]

    rho_0:  1.225            # air density at zero height and 15 °C    [kg/m³]
    alpha:  0.08163          # exponent of the wind profile law
    z0:     0.0002           # surface roughness                       [m]
    profile_law: 3           # 1=EXP, 2=LOG, 3=EXPLOG
    use_turbulence: 0.0      # turbulence intensity

Example settings.yaml, scenario Cabauw, NL

environment:
    v_wind: 5.324            # wind speed at reference height          [m/s]
    upwind_dir: -90.0        # upwind direction                        [deg]
    temp_ref: 15.0           # temperature at reference height         [°C]
    height_gnd: 0.0          # height of groundstation above see level [m]
    h_ref:  6.0              # reference height for the wind speed     [m]

    rho_0:  1.225            # air density at zero height and 15 °C    [kg/m³]
    alpha:  0.234            # exponent of the wind profile law
    z0:     0.0002           # surface roughness                       [m]
    profile_law: 1           # 1=EXP, 2=LOG, 3=EXPLOG
    # the following parameters are for calculating the turbulent wind field using the Mann model
    use_turbulence: 1.0      # turbulence intensity relative to Cabauw, NL
    v_wind_gnds: [3.483, 5.324, 8.163] # wind speeds at ref height for calculating the turbulent wind field [m/s]
    avg_height: 200.0        # average height during reel out          [m]
    rel_turbs:   [0.342, 0.465, 0.583] # relative turbulence at the v_wind_gnds
    i_ref: 0.14              # is the expected value of the turbulence intensity at 15 m/s.
    v_ref: 42.9              # five times the average wind speed in m/s at hub height over the full year    [m/s]
                             # Cabauw: 8.5863 m/s * 5.0 = 42.9 m/s
    grid: [4050, 100, 500, 70] # grid size nx, ny, nz and minimal height z_min                              [m]
    height_step: 2.0         # use a grid with 2m resolution in z direction                                 [m]
    grid_step:   2.0         # grid resolution in x and y direction    [m]

Remarks

• If the parameter use_turbulence is zero, no windfield is loaded.