Search found 11 matches

by Mustafa.Sahin
Wed Nov 22, 2017 4:42 pm
Forum: Controls
Topic: Question about PI control
Replies: 15
Views: 7523

Re: Question about PI control

Dear Jonkman, First of all, thank you for sharing your valuable ideas, experinces with us. I have applied the Gain Scheduling method to the turbine's above rated region. It seems working! but not as good as i expect. When i check simulation results, It takes long time (150-200 second) for the signal...
by Mustafa.Sahin
Sun Nov 19, 2017 12:44 am
Forum: Controls
Topic: Question about PI control
Replies: 15
Views: 7523

Re: Question about PI control

Dear Jonkman,

Thank for your quick reply. I will apply what you have said. when i have further questions, i write them here on Forum.

Yours sincerely.

Mustafa SAHIN
by Mustafa.Sahin
Sat Nov 18, 2017 2:17 pm
Forum: Controls
Topic: Question about PI control
Replies: 15
Views: 7523

Re: Question about PI control

Attachement 2 with explantions
by Mustafa.Sahin
Sat Nov 18, 2017 2:15 pm
Forum: Controls
Topic: Question about PI control
Replies: 15
Views: 7523

Re: Question about PI control

Last Attachement (4)

Mustafa SAHIN
by Mustafa.Sahin
Sat Nov 18, 2017 2:15 pm
Forum: Controls
Topic: Question about PI control
Replies: 15
Views: 7523

Re: Question about PI control

Attachements are given below.

Mustafa SAHIN
by Mustafa.Sahin
Sat Nov 18, 2017 2:13 pm
Forum: Controls
Topic: Question about PI control
Replies: 15
Views: 7523

Re: Question about PI control

Dear Jonkman, In my wind turbine model prepared in matlab/simulink, i am trying to implemet Gain Scheduled PI Blade Pitch Controller which you applied before. Following is what i wrote in a Simulink Block for the Gain Schudeled PI Control for Region 3, i.e blade pitch control in order to calculate y...
by Mustafa.Sahin
Sun Nov 05, 2017 11:43 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Rationale behind frozen wake assumption
Replies: 4
Views: 1244

Re: Rationale behind frozen wake assumption

Dear Jonkman,

Do I always have to use frozen wake assumption whenever i want to linearize turbine model in between the cut-in and cut-out velocities? Or Frozen wake assumtion is only used for the linearization process above the rated wind speeds (for higly loaded rotors).

Yours Sincerely.

Mustafa.
by Mustafa.Sahin
Thu Jun 01, 2017 5:50 am
Forum: Airfoils
Topic: Using Viterna Method in AirfoilPrep
Replies: 5
Views: 7150

Re: Using Viterna Method in AirfoilPrep

Dear Jonkman,

Thank you for your valuable comments

Yours sincerely.

Mustafa SAHIN.
Metu Aerospace Engineering, Turkey.
by Mustafa.Sahin
Tue May 16, 2017 3:28 am
Forum: Airfoils
Topic: Using Viterna Method in AirfoilPrep
Replies: 5
Views: 7150

Re: Using Viterna Method in AirfoilPrep

Dear Jonkman, Do you know at which angle of attack the stall delay effect disappers? According to an example in Airfoilprep program, Cl and Cd data of a profile between -9 and 50 degree are given and the stall delay is applied in this range. So this means that stall delay effect continues to until 5...
by Mustafa.Sahin
Wed Mar 01, 2017 7:06 am
Forum: Rotor Aerodynamics
Topic: NREL 5-MW reference turbine - CP, CQ, CT Coefficients
Replies: 35
Views: 75597

Re: NREL 5-MW reference turbine - CP, CQ, CT Coefficients

Dear Jonkman,

Thank you for your valuable comments on my questions.

Again, thank you so much.

Yours sincerely

Mustafa SAHIN
by Mustafa.Sahin
Mon Feb 27, 2017 10:27 am
Forum: Rotor Aerodynamics
Topic: NREL 5-MW reference turbine - CP, CQ, CT Coefficients
Replies: 35
Views: 75597

Re: NREL 5-MW reference turbine - CP, CQ, CT Coefficients

Dear All, I am trying to implement the BEM method in MATLAB for wind turbine modelling. I have few questions, which are listed below. First of all, I modelled the NREL 5MW offshore wind turbine in MATLAB. My algorithm is just like the Aerodyn, but with different high axial operation correction-Spera...

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