A gravitation based search algorithm for improvement of maximum power transfer by optimal placement of UPFC

In regulated electricity markets, there is trading of large volume of power over existing transmissions lines. Due to this, some corridors experience congestion and may endanger system security, stability and reliability. To overcome this, Unified Power Flow Controller (UPFC) can act as a decongestion device and can improve power flow. The proposed method uses a modified gravitational search algorithm to improve maximum power transfer capability of UPFC. This is tested on IEEE-57 bus system.