Performance Evaluation of UPFC in long Transmission Line

Nowadays the measurement of reliability indices for proper evaluation of reliability in a power system has become a great challenge to power engineers. The HV lines are now installed in different countries as well as in India also. But the amount as well as quality of power transfer is very much responsible towards congestion in power system. FACTS technologies have been introduced to overcome the various operational difficulties during control of power flow as well as power compensation. By properly locating these FACTS devices the phase angle; impedance and voltage profile of the selected bus can be controlled. The UPFC is the most versatile; multifunction controller which uses the complex power electronic devices for the efficient control as well as optimization of power flow in transmission line. In this paper firstly; the basic operating principle of UPFC has been discussed. Additionally the power transmission capacity has also been improved by implementing the UPFC in a modeled power system which has been implemented in MATLAB.