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Congestion Management Using UPFC in Deregulated Power System

P.Suganya, S. Nandini, Mrs. K. Muthulakshmi

Congestion in the transmission lines is one of the technical problems that appear particularly in the deregulated environment. There are two types of congestion management methodologies to relieve congestion in transmission lines. One is non-cost free methods and another is cost-free methods, among them later method relieves the congestion technically whereas the former is related more with the economics. In this paper congestion is relieved using cost free method. Among the various cost free methods, use of FACTS devices method is considered in this paper. The unified power flow controller (UPFC) integrates properties of both shunt and series compensations, and can effectively alter power system parameters in a way that increases power transfer capability and stabilizes system. The above method is tested on modified IEEE 30-bus system and it can be readily extended to any practical systems.