Two deals announced last month reflect the competition. Portuguese utility EDP Energias de Portugal SA agreed to pay $2.15 billion to buy Houston-based Horizon Wind Energy LLC, from investment bank Goldman Sachs, giving the company its first toehold in the U.S. And Denmark's Vestas Wind Systems, the world's largest wind turbine maker, announced plans to build a $60 million wind turbine blade factory in Colorado, its first U.S. manufacturing plant.