Turbine Operational Parameters

The Turbine Operational Parameters are a set of parameters that define the high level operating characteristics of a turbine. Bladed uses these parameters to compute steady state and initial conditions such that the rotor speed is constant. The dynamic behaviour of the turbine can then be refined using a dynamic turbine controller which might or might not use the turbine operational parameters.

The user can decide how the steady state conditions are set in a Bladed calculation. Regardless of which method is used Bladed will internally calculate the generator torque to balance against the aerodynamic torque to maintain constant rotor speed. The pitch angle and rotor speed states are determined using one of the following options set by the user:

• If the user chooses to specify VariableSpeedPitchRegulatedControlModel Bladed will use the specified parameters to automatically compute a suitable operating point (see variable speed pitch regulated control model).
• If the user specifies NominalHubWindSpeedVsRotorSpeedAndPitchAngle Bladed will use the supplied lookup table to set the rotor speed and pitch angle and then tries to compute a balancing generator torque such that the drivetrain acceleration is zero (see operating point lookup table).