Preventive and corrective operation of FACTS devices to cope with a single line-faulted contingency

This paper presents how to find proper operating points of FACTS devices to enhance the steady-state security level considering line contingency analysis. Three generic types of FACTS devices such as series controllers shunt controllers, and series-shunt controllers are introduced and applied to enhance a security margin and to minimize security indices. Quantities (MW) of security margin are depicted in a PV curve and security indices related to line flows and bus voltages are utilized and minimized iteratively in this paper. Contingency analysis is performed to detect the severest line fault in a power system. In this system condition, FACTS devices are tested to establish appropriately preventive or corrective action without generation re-dispatching or load shedding. The FACTS operation scheme is verified on the 9-bus system and the IEEE 57-bus system in a line-faulted contingency.