Enhancement of power transfer capability in a long transmission line using series facts device

Optimal placement of series FACTS device plays a vital role in improving the Power Transfer Capability and also to control the power flow of an existing long transmission line. This paper employs the Thyristor Controlled Series Compensation (TCSC) based series device for the control of the power flow in long distance transmission line. The proposed device is used in different locations such as sending end, middle and receiving end of the different lengths of the transmission line. PI controller is employed in each operating mode. The firing circuit engages three single-phase PLL units for synchronization along with the line current. Simulations are carried out using MATLAB Simulink environment. The suitable location and the performance of the proposed model are examined and compared with and without compensation. This proposed device is tested under the different lengths like 100km to 400km. In every increment of 100km, the impedance, real power and reactive power are noted and tabulated. The results reveals that the power transfer capability at the sending end of the transmission line is sound better when compared with the other ends and also the power flow is