JEE_V3_N2_RP6 D. Ragaleela CH. Padmanabha Raju K. Vaisakh S. Sivanagaraju Journal on Electrical Engineering 2230 – 7176 3 2 49 58 Optimal Power Flow, SSSC, Contingency Analysis, Deregulated Power Industry The planning, operation and control of power system are having great significance governed by security considerations. The estimation of effect of contingencies and planning suitable measures are desirable issues for maintaining security of complex power system. In this paper a novel hybrid method, called Interior Point method embedded with Evolutionary Particle Swarm Optimization is employed to solve optimal power flow problem. IPM-EPSO based methodology considering Series FACTS device like SSSC was proposed for improving the system security and for minimization of fuel cost under consideration of degree of severity of the contingencies. The ranking for the network contingencies is evaluated using composite criteria based fuzzy logic for eliminating masking effects. The proposed hybrid OPF technique using SSSC for deregulated power industry has been tested under simulated conditions on a fewer systems and the results for modified deregulated IEEE 30-bus system were presented for illustration purpose. October - December 2009 Copyright © 2009 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=1048