Analysis of UPFC, SSSC with and without POD in congestion management of transmission system

Since the very beginning of FACTS controllers, congestion management is one of the parameters we control through it. This paper provides the control of power flow and bus voltages in grid using the FACTS controllers. In AC transmission line, power flow can be controlled by injecting a compensating voltage in series with the line. We consider the steady state model of two FACTS Controllers - SSSC, UPFC and SSSC with POD (Power Oscillation Damper) for series voltage compensation, and evaluating their range of power flow control for power grid management. Power flow control ranges are evaluated for a standard 5 bus system. The process of reducing the congestion on power system using FACTS devices are not new, but a combination of POD and FACTS devices are rare. In this research paper, the transmission lines are decongested using this combination and thus the power capability of the transmission system increases. Results are reported to compare the effectiveness of the different FACTS controllers.