Effect of constriction factor on minimization of transmission power loss using Particle Swarm Optimization

In this paper power system network is optimized using Particle Swarm Optimization technique (PSO) considering transmission loss function as problem objective. Specified bus voltage is the system constraint while formulating the problem. Load flow study is carried out using Newton Raphson method (NR method) accompanied by Particle Swarm optimization technique for IEEE-14 and IEEE-30 test bus system. On the basis of result for voltage and phase angle at each bus, PSO technique gives more accurate and efficient result than Newton Raphson method. Also to find out minimum transmission power loss calculation for line flows and losses are carried out for IEEE-14 and IEEE-30 test bus systems, Particle Swarm Optimization technique produces more efficient result than Newton Raphson method. Effect of constriction factor on the rate of convergence, has been shown by plotting a graph for both test systems.