In response to your question, I've attached an informative article on the optimal control of variable speed wind turbines. This article is published in 2012. The variable speed wind turbine is the commonly used design.

I teach this specific subject in my Green Energy Systems course at Yale University

Khalil, Y.F. (Summer 2016). Green Energy Systems (GES). Yale College, Yale University, New Haven, CT 06520, USA.

Hope this helps answer your question.

Professor Yehia Khalil

Yale University

USA

Thank you Sir Yehia F. Khalil, for sharing such a valuable information

Hello , 

I think that control of variable speed wind turbines like MADA by using advenced methods is a recent work, like developped in this work "New neural network and fuzzy logic controllers to monitor maximum power for wind energy conversion system"

alos a techno-economic analysis of  Megawatts wind farm is also be a recent work.

cordialy 

Dear Sir, in attached you will find some recent works (including a review) on operation and control of wind power plants.

Article Participation of wind power plants in system frequency contr...

Article A new control strategy for participation of wind power plant...

Hello Sir,

some interesting topics were presented at the TORQUE-Conference in München last month in the section “Control and supporting technologies”.

The related papers can be found in the Conference Series of the Journal of Physics.

Regards

http://iopscience.iop.org/issue/1742-6596/753/5