FACTS device Power system stability 2 Control actions 1 Control schemes 1 Controller 1 Delay control systems 1 Electric switchgear 1 Facts devices 1 Flexible AC transmission system 1 Loading condition 1 Objective functions 1 Operating regions 1 Optimal locations 1 Optimal placements 1 Optimization process 1 Particle swarm optimization (PSO) 1 Particle swarm optimization technique 1 Population sizes 1 Population statistics 1 Power electronics 1 Static synchronous series compensator 1 System stability 1 Thyristor controlled series capacitor 1 Thyristor controlled series compensator 1 Transient stability 1 Transmission loss 1 Voltage profile 1 Wave transmission 1 Weight coefficients 1 cost of installation 1