Abhishek Gandhar, Priyanka Vashisht, Anupam Joshi, Prince
FACTS (Flexible AC Transmission Systems) means a family of controllers and devices for increase the use and flexibility of power systems. A FACTS controller is a power electronics-based system or other static equipment that provides control of one or more ac transmission parameters”. In this paper, a FIVE BUS SYSTEM is analyzed. . This paper will treat benefits of PST (phase shift transformer)-OLTC (on-load tap changer) installed in power systems such as control of power transmission capability. This paper also includes the main barriers of power system stability and transmission structure. It includes usage of OLTC/PST for the removal of power congestion.