Ten years after the publication of this dissertation the market of renewable energy and especially the wind power segment have changed dramatically and many features, facts and key numbers are outdated since this research, but the key issue of this work remains the same, that is the analysis of every aspect of a wind power plant and the in depth focus of the importance of each one of them in order to accomplish a successful and profitable investment, while providing an alternative to classic ways of producing energy and saving the environment, an issue which especially today is far more urgent than in the beginning of the 21st century, all changes in technology equipment and market dynamics taken under consideration.