This report presents a brief introduction to wind energy and technologies available for horizontal wind turbines. A detailed taxonomy for horizontal axis wind turbines is presented covering parts of the turbine, control systems, applications among others. A detailed landscape analysis of patent and non-patent literature is done with a focus on Doubly-fed Induction Generators (DFIG) used in the horizontal axis wind turbines for efficient power generation. The product information of major players in the market is also captured for Doubly-fed Induction Generators. The final section of the report covers the existing and future market predictions for wind energy-based power generation.
[[Image:Wind_Energy.JPG|right|1000px800px|thumb|Wind EnergySource: [http://www.imageafter.com/image.php?image=b19industry014.jpg&size=full&download=no Image After]]]
=Introduction=