Optimal Planning for the Placement of FACTS Devices by Differential Evolution Technique for the Increased Loadabilty of a Power System

This paper presents Differential Evolution (DE) based approach for the allocation & coordinated operation of multiple FACTS (Flexible AC Transmission System) devices for the improvement of power transfer capacity in an interconnected power system. The DE based approach is applied on IEEE 30-bus system. The system is reactively loaded starting from base to 200 % of base load. FACTS devices are installed in the different locations of the power system and system performance is noticed with and without FACTS devices. First, the locations, where the FACTS devices to be placed is determined by calculating active and reactive power flows in the lines. A Differential Evolution based algorithm is then applied to find the amount of magnitudes of the FACTS devices. A comparative analysis with PSO (Particle Swarm Optimization) is also done. This approach of Differential Evolution based placement of FACTS devices is tremendous beneficial both in terms of performance and economy is clearly observed from the result obtained.