UPFC influence to transient stability of power system

Large-scale power systems operation is faced with many challenges. One of many criteria, which should be fulfilled are stability criteria. Interconnecting separated power systems into interconnected network results in large system complexity, and therefore mixed influences from one power system to another part. Also, new devices are introduced to improve power system performance, like FACTS devices. Main goal of this paper is to examine influence of one of these devices to power system stability.