R. MOHAN MATHUR is Vice President, Training Support and Services Division, Ontario Power Generation, Toronto, Canada. Until 1999 he was Dean, Faculty of Engineering Science and Professor of Electrical Engineering at the University of Western Ontario, London, Canada, where he continues to be a Professor Emeritus. For over two decades he has been engaged in research in the area of electronic controllers for power transmission systems, including ac/dc converters and active and reactive power compensators for ac transmission lines. RAJIV K. VARMA is Professor of Electrical Engineering at Indian Institute of Technology, Kanpur, India. He was awarded the Government of India BOYSCAST Young Scientist Fellowship in 1992-93 to conduct research on FACTS at the University of Western Ontario, London, Canada. Since then he has maintained active research collaboration with researchers at the University of Western Ontario. With Wayne Litzenberger he has coedited two editions of the Annotated Bibliography of HVDC Transmission and FACTS Devices, 1994-95 and 1996-97. For preparing the Second Edition, he was awarded the Fulbright Scholarship of U.S. Educational Foundation in India to travel to the United States. His teaching and research interests include Flexible AC Transmission System and Power System Stability. He is a member of the faculty of the Department of Electrical and Computer Engineering, University of Western Ontario, London, Canada.