FACTS Devices Impact on Congestion Mitigation of Power System

Abstract

The voltage magnitude and reactive power control of a large power system are computed on the basis of its dynamic voltage controllers, which may overcome the limitations of a conventional controller of the power system. The approach of the voltage controller is dynamic in nature and capable of controlling voltage of the bus to the specified level and eliminates such circumstances which may lead the system to become uncontrollable. The static series compensation devices are capable of providing additional flexibility in the operation of power transfer on transmission lines. The previously presented paper discussed multiple applications of FACTS devices either in series or shunt connected. The FACTS devices, i.e., TCSC and SSSC, are incorporated in IEEE-14 bus test system for the analysis of their performance in a relation of reactive power and voltage magnitude. The steady-state modelling of these devices has been carried out by deriving the static equations. The WLS technique is used for measuring system parameters on individual buses. The techniques help in reducing error and improving accuracy in measuring of system parameters. The weak buses on which the voltage profile is poor have been identified. The FACTS devices as mentioned above are located on these buses. The voltage profile on these buses improves remarkably. The reactive power variation on these buses has been computed and graphically plotted. The size of the FACTS devices and their allocation has been determined on the basis of voltage magnitude and reactive power required on those buses during loading conditions. The IEEE 14 bus test system is designed on MATLAB/SIMULINK environment.