OpenFAST / openfast

Main repository for the NREL-supported OpenFAST whole-turbine and FAST.Farm wind farm simulation codes.
http://openfast.readthedocs.io
Apache License 2.0
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Wind turbines do not stop at cut-out speeds. #1742

Closed Relax-in closed 1 year ago

Relax-in commented 1 year ago

Dear all, I have a problem when using a 5mw wind turbine, when I increase the wind speed to 29m/s, I see that the RPM is not 0 in the simulation results, under normal circumstances, when the wind turbine is in the cut out wind speed, shouldn't the wind turbine be undergoing a pitch stop condition? Here are my result graphs for 29m/s 40m/s 50m/s I only set their wind speed and initial pitch angle, other parameters are defaulted and the initial pitch angle is 90 degrees. 1 2 3 If I missed some settings. Please help point out the mistakes, thank you very much. By the way, the math I'm using is 5MW_Land_DLL_WTurb

jjonkman commented 1 year ago

Dear @calcin,

The baseline controller for the OpenFAST model of the NREL 5-MW baseline wind turbine available in the OpenFAST r-test (https://github.com/OpenFAST/r-test/tree/main/glue-codes/openfast/5MW_Land_DLL_WTurb) only includes logic for normal operation. This controller will not initiate a shut down of the rotor at high wind speeds. You'll have to implement your own shutdown control logic or switch to a different reference controller (such as ROSCO: https://github.com/NREL/ROSCO) if you need to simulate shutdown transient events.

Best regards

Relax-in commented 1 year ago

Dear @jjonkman Thank you for your reply, another query solved for me, much appreciated, have a nice life.