One of the biggest generation in Java Bali Power System is located in Suralaya (4500 MW) which supply Jakarta Metropolitan area through Suralaya - Balaraja 500 kV Transmission Lines. An unbalance of power flow problems happen in the Suralaya Baru-Balaraja (2000 A/circuit), Suralaya Lama - Cilegon (2000 A/circuit), and Suralaya Lama- Balaraja (4000 A/circuit) 500 kV transmission line. The Suralaya Baru - Balaraja transmission loading will increase to overload condition when there are new power plant (5625 MW) located around of Suralaya. One of solution to overcome unbalance power flow problem is implementing Series Capacitor or the power electronics devices ie based Flexible AC Transmission Systems (FACTS) technology. Popular FACTS device is Thyristor Controlled Series Capacitor. This device has open up new opportunities for controlling power by set the variable reactance of transmission line, enhancing the usable capacity of present, and improving the stability. In order to have complete view of Series Capacitor and TCSC implementation, this study will consider on steady, dynamic simulation, Sub Synchronous Resonance impact and comparation of estimated cost aspect.