Power System Security Improvement by Using Differential Evolution Algorithm Based FACTS Allocation

The fast development of restructuring, the problem of power system security has become a matter of grave concern in deregulated power industry. To maintain security of such systems, it is desirable to plan suitable measures to improve power system security margins. FACTS devices can regulate the active and reactive power as well as voltage-magnitude. Placement of these devices in suitable location can lead to control in line flow and maintain bus voltages in desired level and so improve security margins. This paper presents a Differential Evolution Algorithm (DEA) based allocation of FACTS devices considering cost function of FACTS devices and power system losses. Proposed algorithm is tested on IEEE 30 bus power system for optimal allocation of multi-type FACTS devices and the results are presented and discussed.