This comprehensive resource presents the fundamentals of power systems, including the theory, practical steps, and methods used in the design and management of energy systems. Readers are provided with a uniquely comprehensive derivation of power electronics and will find practical advice based on actual occurrences in the field using real life scenarios. This book offers a direct mathematical approach for models of the main components in an electrical power system. This resource gives insight into power transformer modeling, transmission line and cable modeling, transmission line load ability, power flows, and real and reactive power and frequency control. General fault studies in electrical power systems and state estimation in electrical power systems are also explored.