Planet Search algorithm based GSA Approaches to optimal Placement of UPFCConsidering transient Stability margin and voltage stability

The present paper proposes a novel search algorithmto optimal placement of UPFC by modification ofgravity search algorithm (GSA). In this regard, effect of transient stability margin and voltage stability margin are takenin to account which isneglected in previous studies. Also, three constrain limitation such as power loss, fuel costand UPFC cost is considered during the optimization.Hence, the GSA is modified by proposed method (PM) which is named planet search algorithm (PSA) to improve Accuracy and Speed of GSA algorithm. In order to validate the performance of proposed method, comprehensive case studyhasbeen conducted on IEEE26-bus test system and Simulation resultsis compared with Primary GSA, PSO algorithm and genetic algorithm. Thecomparison results illustrate ability of the proposed method to fast and accurate placement of UPFC.