Assessment on the effect of Optimally-Allocated Multi-type FACTS on Short Circuit Level, Voltage Stability and Voltage and Power Security

Flexible alternative current transmission system (FACTS) devices can regulate the active and reactive power as well as voltagemagnitude. Placement of these devices in suitable locations can lead to the control of line power flow, bus voltages and short circuit currents at desired levels and as a result, improvement of power system security margins. This paper presents an optimal allocation algorithm for FACTS devices based on a novel particle swarm optimization method considering power system costs as well as cost of losses, short circuit level and voltage stability. The proposed algorithm has successfully been applied to an IEEE 30-bus power system and the results are presented and discussed.