This book examines the generation, transmission, distribution, and applications of electric power at a level suitable for practicing professionals and upper level undergraduates in science and engineering programs. It examines the demands and generation of conventional and alternative energy technologies and considers the economic and environmental aspects throughout. It also discusses prime movers in energy: heat engines, water and wind turbines, electrochemical systems, and photovoltaics. The book covers all facets of power grids, including generators, transformers, transmission and distribution systems, electric motors, and protective systems.