Voltage Source Converter - Flexible AC Transmission System - High Voltage Direct Current (VSC-FACTS-HVDC) is an advanced technology in electrical power systems. It integrates the benefits of VSC and FACTS with HVDC transmission, enhancing grid stability, efficiency, and control. VSC-HVDC allows for independent control of active and reactive power, improving voltage stability and enabling the connection of renewable energy sources. FACTS devices, such as STATCOM and SVC, further optimize power flow and mitigate issues like voltage sags and harmonics. The synergy of these technologies supports long-distance power transmission, grid interconnections, and integration of offshore wind farms. Overall, VSC-FACTS-HVDC systems offer robust solutions for modernizing and stabilizing power networks, accommodating the growing demand for renewable energy, and ensuring reliable electricity delivery. Most of the topics introduced in this book cover new techniques and the applications of VSC-FACTS-HVDC. Such selected concepts that redefine this area have been presented in this book. This book is a vital tool for all researching or studying electrical systems as it gives incredible insights into emerging trends and concepts.