"Power System Fundamentals" is a textbook compiled according to the teaching requirements of the electrical "Power System Fundamentals" course in higher vocational colleges. Each chapter is compiled based on the characteristics of vocational and technical education in higher vocational colleges, and the main knowledge content is carefully arranged to make it easy for readers to learn and master, and has concise and refined practical features. The book is divided into 10 chapters, including the concept of power system, equivalent circuit of each component, power flow distribution calculation, frequency adjustment and voltage adjustment, system economic operation, symmetrical fault analysis and asymmetrical fault analysis, power system operation stability analysis, etc. There are exercises at the end of each chapter to help readers review and practice. "Basics of Electric Power Systems" is mainly suitable for the teaching of power plants and power systems majors (three-year program) in higher vocational colleges and electricity majors such as power supply and consumption. It can also be used as an auxiliary teaching material for studying this course in colleges and universities, adult education and other related majors. It can also be used as a reference for engineering and technical personnel engaged in power system work.