Date of Publication :15th September 2024

Abstract:The greater need for uninterrupted power supply greed higher quality of power. Flexible AC Transmission Systems (FACTS) controllers/devices are quickly becoming a crucial part of modern power systems; these devices are utilized to expand the potentiality of transmission and enhance the stability as well as the quality of power supply. Several FACTS devices along with the hierarchy of the FACTS family are described in this paper. The properties, benefits, and applications are also addressed here. Among the various devices, STATCOM has the advantage of very quick response, low cost, and low losses. However, its dynamic capability is limited and it faces difficulty in controlling the steady-state power flow. UPFC being the union of SVC and STATCOM, do involve in managing the active/reactive power hence improving the stability of the system. Though it bears a wide dynamic range and improved stability but more complex and expensive than STATCOM. The Static Var Compensator (SVC) is a shunt-type FACTS device that is used to control the reactive power flow and voltage profile. The SVC is expensive and difficult to operate. In conclusion, FACTS devices are important components of modern power systems due to their ability to improve power system stability and power quality. This paper deals with an overview of various FACTS devices used in finding solutions to issues in power system quality.

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