Optimal Location of FACTS Devices for Congestion Management in Deregulated Power Systems

In the emerging deregulated electric power market, congestion management becomes extremely important and it can impose barrier to electric power trading. There are t w o 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 optimal location of TCSC and UPFC to relieve congestion in the network is proposed. In congestion management, the objective function is nonlinear hence for solving this function genetic algorithm (GA) technique is used. The above method is tested on IEEE 57-bus system and it can be readily extended to any practical systems. General Terms Congestion, Deregulated Power System, Flexible AC Transmission Systems (FACTS), Thyristor Controlled Series Capacitor (TCSC), Unified Power Flow Controller (UPFC), Genetic Algorithms(GA), Optimal Power Flow (OPF).