Published Paper Details:

The improve Transient Stability of a two area power system , UPFC based on conventional P-I control can be connected to verify that the constant power flow from one area to other area, even if severe fault occurs on the line is achieved. For this a Multimachine power system is developed (Kundur test system) and UPFC is connected on line, modeled & designed its series controls. A MATLAB Simulink model for the enhancement of transient stability technique with both without UPFC and with UPFC is developed .By the use and tuning of UPFC controllers (PI regulators) the constant power flow from one area to other area, even if severe fault appears on the line is achieved in transient state. Simulation is carried out in the MATLAB/Simulink platform. Simulations run for duration of 50 sec. with the application of three phase fault, (applied only for the 0.1 seconds and after that it is removed by the auto recloser circuit breakers) to prove that UPFC helps in enhancing transient stability of a Multi-machine power system in the event of severe fault. Detailed simulation studies are carried out with MATLAB/SIMULINK environment for three cases :(a) Without UPFC, without fault (b) without UPFC, with fault(c) with UPFC, with fault.