Improvement of Voltage Stability in Power System using SVC

Abstract

The increased demand for electricity has pushed the electrical grid closer to its stability limit. Due to many methods used to enhance the power system, voltage instability and line overloading have become a difficulty. The creation, transmission, and consumption of reactive power can all be used to investigate the nature of voltage stability. Reactive power unbalancing, which happens when the power system is strained, is one of the key reasons of voltage instability. Flexible AC transmission system (FACTS) devices are vital for enhancing the performance of a power system, but they are also quite expensive, thus they must be placed optimally in the power system. Static var compensator (SVC), a FACTS device, can be used to minimise flows in densely laden lines, resulting in minimal system loss and enhanced voltage stability. A method is proposed based on the index of line stability and overall system of VAR power losses was used to select the best position for the SVC device. Using VSI calculation on the power flow system, the weakest bus will be determined and will be assign as the optimal location for SVC. Also, along with this paper an observation on a power flow system with and without SVC are compared. Therefore, the finding of this research paper will show that SVC can stabilize the voltage profile of a power flow system.