Security constrained optimal power flow employing particle swarm optimization

This paper proposes an algorithm to solve the optimal power flow (OPF) problem with security constraints. The proposed approach uses particle swarm optimization (PSO) algorithm to obtain the optimal power dispatch for a given load so that the fuel cost is minimized and all operating and security constraints are satisfied. This algorithm computes the optimal generation schedule and effectively relieves bus voltage and line flow violations under single line outage contingencies. Security constraints such as bus voltage and line flow violations are effectively handled in the optimization problem using penalty function approach. The proposed approach has been tested on standard IEEE30 bus system. The results clearly indicate the superiority of the PSO algorithm in obtaining feasible solutions consistently for all tested line outages.