• Dinesh Madhavrao Dusane
• Gaurav Arunrao Sonawane
• Yogesh Dilip More
• Prof. Vinod P. Patil

The development of the modern power system has led to an increasing complexity in the study of power systems, and also presents new challenges to power system stability, and in particular, to the aspects of transient stability and small -signal stability. Transient stability control plays a significant role in ensuring the stable operation of power systems in the event of large disturbances and faults, and is thus a significant area of research. This paper investigates the improvement of transient stability of a two-area power system, using UPFC (Unified Power Flow Controller) which is an effective FACTS (Flexible AC Transmission System) device capable of controlling the active and reactive power flows in a transmission line by controlling appropriately its series and shunt parameters. Simulations are carried out in Matlab/Simulink environment for the two-area power system model with UPFC to analyze the effects of UPFC on transient stability performance of the system. The performance of UPFC is compared with other FACTS devices such as Static Synchronous Series Compensator (SSSC), Thyristor Controlled Series Capacitor (TCSC), and Static Var Compensator (SVC) respectively. The simulation results demonstrate the effectiveness and robustness of the proposed UPFC on transient stability improvement of the system.

FACTS, Matlab/Simulink, SSSC, SVC, TCSC, Transient stability, Two-area power system, UPFC.

"Simulation of Extra High Voltage Long Transmission Line", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 5, page no.272-279, May-2018, Available :http://www.jetir.org/papers/JETIR1805469.pdf

"Simulation of Extra High Voltage Long Transmission Line", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 5, page no. pp272-279, May-2018, Available at : http://www.jetir.org/papers/JETIR1805469.pdf