Hi everyone,
I’m currently simulating DLC 1.2 (IEC 61400-1) for a custom wind turbine as part of my master’s thesis, focusing on rotor blade modeling. The wind speed range I’m using spans from 3 m/s (cut-in) to 25 m/s (cut-out) (turbulent wind). However, I’ve observed some unexpected controller behavior in the results.
In several simulations, the controller appears to shut down unexpectedly or fails to actuate pitch control at all. I’m unsure whether this points to an issue with the controller itself, or if the root cause lies within my model setup (e.g., numerical instability or improper initialization).
Unfortunately, I have very limited information about the controller — I only know the rated generator torque and speed (79293 Nm and 739,82 rpm), and that the .dll was compiled from a Simulink model. To further investigate, I ran a simulation with a uniform wind speed ramp from 3 m/s to 30 m/s. These are the results I got:
For initialization, I used a rotor speed of 3.3 rpm and a pitch angle of 2° for all three blades.
Does this look like a controller issue to you, or could this just be a problem with how my model is set up?
Any help or suggestions would be greatly appreciated!
Best regards,
Linus
