Load flow analysis and optimal allocation of SVC in nine bus power system

Abstract

The demand of quality & reliable power by the consumers is increasing day by day in a tremendous manner. Everyone needs good quality of power with out any disturbances or interruptions. Also due to large no of present day consumers, the power system needs a boosting mechanism in order to capitalize the complexity of power system. So a reliable technology of FACTS(Flexible AC Transmission System) is introduced in the power system to enhance the flexibility of power grids. FACTS devices are power electronics based controllers & improve the system performance by shunt or series compensation. They injects or absorbs reactive power to/from the power system at the time of need. In this paper a shunt type of FACTS controller such as SVC(Static Var Compensator) is considered for stability enhancement & loss minimization in a nine bus power system. SVC consists of TCR(Thyristor Controlled Reactor), TSC(Thyristor Switched Capacitor), a fixed capacitor connected parallel to the line & filter elements for harmonic reduction. Here the enhancement of voltage stability & loss minimization is analyzed in terms of voltage magnitude variation & overall real & reactive power losses at each bus w.r.t the location of installation of SVC. Firstly Load flow study carried out for an uncompensated system & then for SVC compensated system by changing the location of installation of SVC from bus1 to bus9. And also thereby specifying the optimal location of SVC by analyzing the load flow data in terms of voltage magnitude variation & overall losses. All the performance analysis has been performed using MATLAB/SIMULINK software.