Steve Miller

@MohammadReza -- concerning the negative power, this model does not have any logic to control when the generator is connected to the grid. As a result, there is a significant transient when we simply close the breaker when the turbine is near the appropriate speed. The unexpected sign is because the generator is actually driven by the grid for a short period of time.

@MohammadReza -- when you first open the model it is configured to run with only the mechanical load from the generator and omits the electrical system. To include the electrical power generation, you need to go into the Nacelle subsystem, right-click on the Generator Block, and select "Block Choice" / "Full". Then you will see output on the Power Scope.

Ashish -- you need SimDriveline to run this model. Make sure you are using the right MATLAB release. Before R2011a, use the R2009b version, after R2011a use the R2011a version.

@Sepideh: Yes, of course I did, It has successfully done miss Sepideh and I'll defend my work less than one week later... (my first comment that didn't show up) ;)

Thank you, this project is really useful.
@MohammadReza: Did you solve your problem? You know, My project is designing pitch controller for wind turbine by robust fuzzy controller method as well.