This book is a professional textbook for "Electrical Operation of Power Plants and Substations" and related majors. Its main contents include the basic concepts of power generation, substations and power systems, neutral point grounding methods and short-circuit current calculations, main primary equipment of power plants and substations, electrical main wiring and distribution devices, grounding devices, secondary circuits and wiring, as well as overvoltage and protection of power plants and substations. The book also introduces some new technologies and equipment.