Main Article Content
The power system operation and its security management has become one of the typical tasks to system operator under competitive market environment. The economic efficiency of energy market is mainly dependent on strategic bidding of the market participants and network capability to drive market driven schedule. In order to avoid congestion state and its consequences, the traditional approaches for security management have been replacing by modern technologies like flexible ac transmission system devices, distributed generation etc. This paper addressing the congestion relief approach using unified power flow controller (UPFC). The location and its parameters are optimized with an objective of social welfare maximization. The results on IEEE 30-bus test system are validating the proposed deterministic approach based on contingency ranking for optimal location of UPFC in deregulated power systems.