Modern electrical power systems are being expanded continuously and are upgraded to cater the want of ever growing electrical power demand. However in recent years, electrical energy developers have faced both the financial difficulties as well as the environmental difficulties in expanding the power generation and transmission. These situations have forced power designers to look for advanced techniques system to enhance controllability, stability, and power transfer capability of ac transmission systems which are FACTS devices used to control power flow in the transmission grid to relieve congestion and limit loop flows. FACTS using Thyristor Controlled Reactance is thus used either when charging the transmission line or when there is very low load at the receiving end.