A new approach for optimal location of TCSC in a power system to enhance voltage stability: Steady state studies

This paper investigates a novel optimization-based methodology for placement of series-connected FACTS devices in order to increase static security margin and improve voltage profile of a power system. The optimizations are based on location, size, and number of series FACTS devices. The problem is formulated according to sequential quadratic programming (SQP) in the first stage to accurately evaluate static security margin in the presence of series FACTS devices, and in the next stage a genetic algorithm (GA) based optimization method is used to find the optimal solution. The proposed placement approach enhances distance of voltage collapse point without use of high computational burden procedures such as continuation power flow method. The AEP 14-bus test system is selected to validate the proposed approach.