Optimal Power Flow with Security Constraint for 330kv Nigeria Power Network using Power World Simulator

Optimal Power Flow (OPF) with security constraint is becoming increasingly important in the new deregulated environment of electric power systems as it considers both the normal state and contingency constraints, and therefore is a key function for modern power systems. It is formulated as a large-scale non-convex optimization problem. This paper focuses on the simulation and analysis of the OPF with contingency constraints for the 41-bus Nigerian 330kV power network using Power World Simulator. A prototype of the network was developed in Power World Simulator using the network data sourced from relevant utility companies. Single line contingency were considered. The results obtained show that while the network was stable at pre-contingency state, a lot of violations occurred at the event of some single line contingencies. To maintain security in the face of these credible contingencies, the network generators output were re-dispatched and this resulted in the increase and disparity in the bus marginal prices.