An electrical power system is an assembly of electrical components aimed at the supply, transfer and storage of electric power. The field of electrical power systems has undergone a major transition in recent years as the focus from fossil fuels has shifted to renewable energy sources. Further, with the advent of new technologies like power electronics, energy storage, better models for the efficient production and transmission of energy are now available. The applications of electrical power systems are in the areas of photonics, renewable energy generation, automation, robotics, telecommunication, electric and hybrid vehicle technologies among many others. This book provides significant information on the design, networks and applications of power systems. The various studies that are constantly contributing towards advancing technologies and evolution of this field are examined in detail. This book is an essential guide for engineers, academicians and students who wish to pursue this discipline further.