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.
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.