Voltage Stability enhancement by Coordinated design of FACTS devices by Particle Swarm Optimization algorithm

The grow of electrical energy utilization and day by day increment of nonlinear loads in power system forced for high electrical power and better stability. Flexible AC Transmission System (FACTS) is a key solution for power system performance enhancement. Based on that, a particle swarm optimization (PSO) algorithm is applied to design the coordinated parameters of static VAR compensator (SVC) and Thyristor Controlled Series Capacitor (TCSC). A self-sufficient model of IEEE fourteen bus system has been taken and voltage stability analysis is done by considering load changing at a bus and change of power factor at load. PSO applied here is built on searching the values of L and C of SVC. PSO is available with few modification like change in PSO range & number, difference in selection criteria technique, control technique etc., with due respect to normalize PSO. From the results, it is found that coordination of FACTS devices with each other promises the efficiency of the suggested method for enhancement of voltage stability.