Selection of Pilot buses for VAR Support Considering N-1 Contingency Criteria

This paper proposes a new approach for the identification of possible bus location, pilot buses, for reactive power support that will improve voltage stability and security. A continuation power flow based N-1 contingency analysis is performed alongside the reactive power management to pinpoint the locations for the VAR support provided in this study by an SVC. The approach is through the optimization of a performance index that account for worst voltage deviations at all load buses and at the same time maximizing the loading margin. A case study of the proposed approach is performed on the IEEE 14 bus system and when compared to existing methods, it shows that the proposed approach gives better results