Modified Differential Evolution based Multi-Objective Congestion Manage- ment in Deregulatory Power Environment

Congestion Management (CM) is a very important aspect of present deregulatory power environment. In the restructured power market congestion occurs when the transmission network is unable to accommodate all the desired transaction due to violation of system operating limit. Increase of real power loss, increase of load demand compared to generated power, lack of Var sources or the fall of voltage level may be the different causes of CM problem. While solving the CM problem this paper minimises real power loss and reactive power generation aspect together as multi-objective solving problem with the concept of dominance and Pareto optimality. In this paper Thyristor Controlled Series Capacitor (TCSC) is inserted in the transmission line to settle multi-objective CM problem. The optimal location of the TCSC placement is suggested by the sensitivity factor analysis. The optimal size and the operating mode of the TCSC device are decided by the Modified Differential Evolution (MDE) method. As a test case IEEE 30-bus system is considered to solve the said problem.