Voltage stability improvement of power system using a shunt capacitor

Abstract

Due to the deregulation of the electricity market, increasing demand approaching transmission capacity, and the endeavor for economic benefits, the power system is recently placed under more severe operating conditions than ever before. Therefore, voltage stability analysis is a major concern in power system planning and operation. This paper proposes a method to improve the voltage stability of the power system by using the active and reactive power information of the transmission line in accordance with the voltage stability index. Installing a bank of shunt capacitors at the load substation in order to inject the proper amount of reactive power can improve the voltage stability of the system as shown by simulations.