Enhancing Voltage Stability of Thu Duc Transmission System Using Static Var Compensator

This paper presents the comparative simulation results of using Static VAR Compensator (SVC) for enhancing the quality of voltage in normal operating conditions and fault conditions such as reducing oscillation and transience stability after three-phase short circuit fault happened. To improve the voltage stability of this studied Thu Duc transmission network in normal and fault operating conditions, an SVC device is proposed and installed at Intel bus for researching its effectiveness and the stability of the system. The presenting results are implemented by using Mullah software which is a powerful tool for simulating power transmission network. It can be concluded from simulation results of a case study based on the Thu Duc power system that SVC can gain the voltage profile, reduce amplitude and also improve transience time after the three-phase fault occurred. These parameters meet the grid code and qualifications of the studied system after severe hard operating conditions.