STABILITY ANALYSIS USING UPFC

Flexible AC Transmission Systems (FACTS) is an Alternating current transmission systems incorporating power electronic based and other static controllers with an aim to build flexibility in the system in order to enhance controllability and increase power transfer capability.FACTS Controller is a power electronic based system and other static equipment that provide control of one or more AC transmission system parameters. The term FACTS controllers describes power electronic based circuit configuration applied in ac transmission systems. FACTS represent flexible ac transmission system, with the term ‘flexible’ implying the controllability of voltage and/or current.