FLEXIBLE AC TRANSMISSION-SYSTEMS - A STATUS REVIEW

With the availability of high power semiconductor switches with turn-o ff capability, voltage source converter based controllers for power tr ansmission system applications have become a reality. Prototypes of so me second generation Flexible AC Transmission System (FACTS) controlle rs like TCSC and STATCON have been installed. This paper presents a re view of the progress in FACTS. A generalized description of FACTS cont rollers is also presented.