Protection of Electrical Power Transmission Systems: Smart Grid - Microgrid, AI, and Cybersecurity provides a thorough examination of power transmission system components, architecture, and common vulnerabilities. This classroom-tested textbook introduces the techniques and technologies used to protect transmission systems, explaining the concepts of Transducers, overcurrent relays, distance protection, current differential protection, auto-reclose for transmission systems, numeric protection, smart grid operations and control, micro grid operations and control, power transmission line characteristics, Artificial Intelligence industrial application, cyber security and Information power system to ensure the power system remains protected even when the protection system fails. The book emphasizes that understanding the subject is best achieved by working with schemes and exploring the history behind their development, enabling readers to delve deeper into the specifics of the subject. Exercises and self-assessment questions addressing a broad range of technical questions are provided to ensure a comprehensive understanding of the design and manufacturing process to establish seamless topologies of protection control schemes. Coverage includes relevant regulations and standards to ensure compliance with industry requirements, emerging trends, and technologies to future-proof systems against evolving threats and leverage cutting-edge innovations.