Allocating TCSC for Transmission Congestion Management in Deregulated Environment

Abstract

Congestion management is an essential aspect in the restructured power market. The key objective is to alleviate or reduce the congestion from the lines for the consistent and economic operation of the system. There are different ways to manage congestion such as cost-free approach and non- cost free approach. In this dissertation, cost-free approach i.e., use of FACTS devices has been employed to overcome the congestion problem. Two methods, namely LMP difference method and congestion rent contribution method have been used for installing the series FACTS device in the most optimal place. These methods depend on nodal prices which are obtained from the optimal power flow solution. Hence, these have been obtained from DC optimal power flow in the presented work. The techniques used for this purpose are- linear programming (LP) and ge- netic algorithm (GA). The comparison has been made between both the techniques on the basis of generation cost and LMP values. It has been found that generation re-dispatch with GA leads to savings in the generation cost. Hence, GA technique has been used to find the most optimum location to allocate TCSC which gives the minimum congestion rent value. In order to show the efficacy of the employed methods, they have been applied on two IEEE test systems.