A New Method for Optimal Series FACTs Devices Placement to Relieve Congestion in Deregulated Power Systems

In today's wide power systems, there is no possibility to test all lines for compensator devices placement. Therefore, formation of a list of priority system lines is essential. The most important methods for this purpose are locational marginal price difference method, congestion cost contribution method and line outage sensitivity factor method. In this paper, these three methods have been compared and with the introduction of congestion-causing lines and de-congestion lines as new concepts, the locational marginal price method has been modified and improved. Then in the proposed method, series compensators placement process is also examined with investigation cost consideration. To comparison the methods, all of the methods are simulated on New England 39-bus standard system and results confirm the efficiency of the proposed method.