Optimal Location Selection of SVC for Voltage Stability Enhancement

Abstract

One of serious problems in power systems that can threaten the concept of power systems reliability and security is voltage instability. Improving the system's reactive power handling capacity via Flexible AC Transmission System (FACTS) devices is a remedy for prevention of voltage instability and hence voltage collapse. This thesis presents the enhancement of voltage stability and reduced active and reactive power losses on standard IEEE-14 bus system by selecting the optimal size and location of SVC using voltage stability index method (L-index). The bus with the highest L-index value will be the most vulnerable bus in the system, and hence this method helps in identifying the weak areas in the system which its reactive power needs support . The analysis is carried out using NEPLAN and PSAT software. And the results is discussed.