Acknowledgments

      We both would like to thank our former colleagues at Westinghouse where the pioneering development of FACTS controllers started in 1990 under the technical leadership of Dr. L. Gyugyi. We are very grateful for all those who dedicated their time to review the manuscript thoroughly and provide valuable feedback. Special gratitude goes to Mr. R. Alexander, Dr. S. Behzadirafi, Mr. J. M. DeSalvo, Dr. M. Haj‐Maharsi, Dr. A. J, F. Keri, Dr. T. Manna, Mr. A. Parsotam, Mr. G. Pedrick, Dr. B. Shperling, and Mr. R. Subramanian. We acknowledge the continuous effort to promote Sen Transformer – a SMART Power Flow Controller technology by Dr. S. Behzadirafi, Mr. A. Ettlinger, Dr. B. Fardanesh, and Mr. G. Pedrick of New York Power Authority, late Mr. M. Henderson of New England ISO, Mr. A. Parsotam of Newcastle, New South Wales, Australia, Prof. V. Dinavahi of University of Alberta, Prof. R. Gokaraju of University of Saskatchewan, Mr. R. Alexander, and Mr. J. M. DeSalvo. We thank American Public Power Association and Abby Anaday on Unsplash for using their respective photos of Hydropower and Windmill on the coverpage. After performing decades of research on various power flow control technologies, we feel that “the more we learn, the more we realize how little we know.” We appreciate feedback from the readers. Our email addresses are [email protected] and [email protected], respectively.

      K.K.S.

      M.L.S.

      I would like to acknowledge my three professors, in particular, late S. K. Dutta of Jadavpur University for teaching me the basics of power electronics – a new and upcoming subject during 1970–1980, Dr. P. K. Ray of Tuskegee University for giving me a thorough training on how to conduct a basic research, and Dr. A. E. Emanuel of Worcester Polytechnic Institute for perfecting the mold as my PhD thesis Advisor.

      Very special thanks go to my two Westinghouse mentors – late T. Heinrich and late M. Brennen whose insights in power electronics were unparalleled. Proper thanks go to Dr. L. Gyugyi who convinced me to change my job from academia to industry, a change that I never regretted. He is the inspiration for my life‐long passion to develop power flow control technologies. I feel fortunate to have worked in the development of FACTS products under his supervision.

      Throughout my tenure at Westinghouse Science & Technology Center in Pittsburgh, I had a rare opportunity of working with extraordinary people from all over the world. Not only were they a fine class of engineers, they also had hobbies that could be considered as careers in their own rights. During the long hours of commissioning of the world’s first UPFC in Kentucky and a STATCOM in Texas, and the TNA test in Montreal, the team of engineers kept everyone amused with their life stories. I thank the fine colleagues at the Tennessee Valley Authority, American Electric Power, New York Power Authority, Bonneville Power Administration, Western Area Power Administration, and the Electric Power Research Institute.

      K.K.S.