An electrical power system refers to a network that uses, supplies and transfers electric power using electrical components. An electrical grid is an electric power system. It constitutes of generators, transmission systems and a distribution system. A power system ideally consists of power sources, loads, conductors, power electronics, capacitors and reactors, protective devices, etc. Power systems can be of different types depending on their design and mode of operation. Some common types are residential and commercial power systems. This book is a compilation of chapters that discuss the most vital concepts and emerging trends in electrical power systems. It aims to shed light on some of the unexplored aspects of power systems and the recent researches in this technology. With state-of-the-art inputs by acclaimed experts of electrical, electronic and power engineering, this book targets students and professionals.