This book includes a comprehensive and systematic introduction of electric power transmission systems, from basic transmission planning and concepts to various available types of transmission systems. Written particularly for a student or practicing engineer who may want to teach himself or herself, the basic material has been explained carefully, clearly, and in detail with numerous examples, which is also useful for professors. In addition to detailed basic knowledge of transmission lines, new components enabling modern electronics and renewable penetrated transmission systems are emphasized. The discussion goes beyond the usual analytical and qualitative analysis to cover overall aspects of transmission system analysis and design.