Power Systems Operation Modes . Training manual for bachelors and masters of the direction "Electric Power Engineering" by Kobelev A. In. , Kochergina S. In. and Pechagina E. A. It is a unique and indispensable source of knowledge for students and professionals seeking to understand more deeply the complex mechanisms of the functioning of electric power systems. This manual not only covers theoretical aspects, but also offers practical recommendations, making it an ideal choice for those who want not only to learn, but also to apply the knowledge gained in real conditions. The book immerses the reader in the world of electricity, starting with the basics and ending with more complex concepts. The authors carefully worked on the material so that students could easily absorb the information and apply it in practice. The manual discusses various modes of operation of electric power systems, including normal, emergency and transition modes. This is important for future engineers, since understanding these modes allows not only to effectively manage power systems, but also to prevent possible emergency situations. The manual will be especially useful for undergraduate and graduate students studying in the field of "Electric Power Engineering", as well as for teachers and practitioners in this field . The book will be an excellent help for those who are preparing for exams, as well as for those who want to deepen their knowledge and skills in the design and operation of electric power systems. The topics raised in the book cover a wide range of issues, such as systems stability analysis, methods for calculating operating modes, as well as current trends in the field of electricity. The authors emphasize the importance of integrating renewable energy sources and digitalizing energy systems, which makes the book relevant in the light of current challenges and changes in the energy sector. This manual not only educates, but also inspires further research and development in the field of electricity. The style of the authors is distinguished by clarity and accessibility of the presentation . They use a variety of illustrations, diagrams, and examples to help the reader better understand complex concepts. Kobelev A. In. , Kochergin S. In. and Pechagin E. A. experienced specialists in their field, and their knowledge and experience make this manual especially valuable. Each of them has considerable experience in the electric power industry and scientific publications, which adds additional value to their joint work. If you are looking for a tutorial that not only explains the theory, but also offers practical solutions, “Power Systems Working Modes” will become your reliable assistant. The book will help you not only prepare for the exams, but also give you the opportunity to look at the electric power industry from a new perspective, deepening your understanding and interest in this important area. In conclusion, this manual is not just a textbook, but a whole world of knowledge that opens the door to the future of the electric power industry. It will be an excellent choice for students, graduate students, teachers and anyone interested in modern aspects of the operation of electric power systems. Do not miss the opportunity to immerse yourself in the fascinating world of the electric power industry with this unique tutorial!