Power System Small Signal Stability Analysis and Control

3.9 Model of FACTS devices

FACTS is an acronym for flexible alternating current transmission system. The philosophy of FACTS is to use power electronic-controlled devices to control power flows in a transmission network, thereby allowing transmission line plant to be loaded to its full capability. Power electronic-controlled devices, such as static VAR compensators, have been used in transmission networks for many years; however, the concept of FACTS as a total network control philosophy was introduced in 1988 by Dr. N. Hingorani from the Electric Power Research Institute in the United States.

FACTS is defined by the IEEE as “A power electronic based system and other static equipment that provide control of one or more ac transmission system ...