A Power flow control, in an existing transmission line, plays an imperative role in Power System. This study makes use of the Shunt Attached Compensation (STATCOM) FACTS device for the manipulation of voltage and the power flow in a transmission line. The proposed devices are used in different sites such as sending end of the, middle and receiving end of the transmission line. Simulations were carried out using MATLAB SIMULINK software. The apposite location and the performance of the proposed model were examined. In this study a STATCOM is cast off to standardize voltage in a power system. The STATCOM more proficiently boost the voltage stability and upsurge transmission size in a power system. In this study a semblance is also performed between SVC and STATCOM under burden state and it is shown that STATCOM have the adeptness to take care for more capacitive power during a slip over SVC. It is also shown that STATCOM revelations accelerated retort than SVC.